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Siemens Simatic S7-1500 Function Manual
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Siemens Simatic S7-1500 Function Manual

Cycle and response times
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  • Page 2 ___________________ Preface ___________________ Documentation guide ___________________ SIMATIC Program execution ___________________ Cyclic program execution S7-1500, S7-1500R/H, ET 200SP, ET 200pro ___________________ Event-driven program Cycle and response times execution ___________ Cycle and response times of the S7-1500R/H redundant Function Manual system 10/2018 A5E03461504-AD...
  • Page 3 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.

  • Page 4: Preface

    Preface Purpose of the documentation The controller offers various options for program execution with different run priorities. Cyclic-driven and time-driven program execution have the largest share. The response times of a controller are therefore significantly determined by the processing cycles. There is also the possibility of event-driven program execution.
  • Page 5 Functions that you will be familiar with Starting from section Program contents ual expanded to include the from the SIMATIC S7-1500 CPUs are execution (Page 13) CPUs of the ET 200SP implemented in CPUs in other designs distributed I/O system and...
  • Page 6 Siemens' products and solutions undergo continuous development to make them more secure. Siemens strongly recommends that product updates are applied as soon as they are available and that the latest product versions are used. Use of product versions that are no longer supported, and failure to apply the latest updates may increase customers' exposure to cyber threats.
  • Page 7 Preface Industry Mall The Industry Mall is the catalog and order system of Siemens AG for automation and drive solutions on the basis of Totally Integrated Automation (TIA) and Totally Integrated Power (TIP). You can find catalogs for all automation and drive products on the Internet (https://mall.industry.siemens.com).

  • Page 8: Table Of Contents

    Table of contents Preface ..............................3 Documentation guide ..........................8 Program execution ..........................13 Principle of operation ......................13 Overload behavior ........................16 Cyclic program execution ........................20 Cycle ............................21 Cycle time ..........................24 3.2.1 Different cycle times ........................ 24 3.2.2 Influences on the cycle time ....................

  • Page 9: Documentation Guide

    Documentation guide The documentation for the SIMATIC S7-1500 automation system, for CPU 1516pro-2 PN based on SIMATIC S7-1500, and for the distributed I/O systems SIMATIC ET 200MP, ET 200SP and ET 200AL is divided into three areas. This division allows you easier access to the specific information you require.
  • Page 10 You must register once to use the full functionality of "mySupport". You can find "mySupport" on the Internet (https://support.industry.siemens.com/My/ww/en). "mySupport" - Documentation In the Documentation area in "mySupport" you can combine entire manuals or only parts of these to your own manual.
  • Page 11 ● Manuals, characteristics, operating manuals, certificates ● Product master data You can find "mySupport" - CAx data on the Internet (https://support.industry.siemens.com/my/ww/en/CAxOnline). Application examples The application examples support you with various tools and examples for solving your automation tasks. Solutions are shown in interplay with multiple components in the system - separated from the focus on individual products.
  • Page 12 You can find the SIMATIC Automation Tool on the Internet (https://support.industry.siemens.com/cs/ww/en/view/98161300). PRONETA With SIEMENS PRONETA (PROFINET network analysis), you analyze the plant network during commissioning. PRONETA features two core functions: ● The topology overview independently scans PROFINET and all connected components.
  • Page 13 Documentation guide SINETPLAN SINETPLAN, the Siemens Network Planner, supports you in planning automation systems and networks based on PROFINET. The tool facilitates professional and predictive dimensioning of your PROFINET installation as early as in the planning stage. In addition, SINETPLAN supports you during network optimization and helps you to exploit network resources optimally and to plan reserves.

  • Page 14: Program Execution

    Program execution Principle of operation Introduction You often program your user program with a cyclic OB, usually in OB 1. With complex applications, problems are often encountered in complying with the response times required by the application. You can often meet the response time requirements by splitting the user program up into several parts with different response time requirements.
  • Page 15 Program execution 2.1 Principle of operation Using process image partitions If you have distributed a program over various OBs, for example, due to different response time requirements, it is advisable and often necessary to assign the update of the used I/O data directly to these OBs.
  • Page 16 ● S7-1500R/H redundant system (https://support.industry.siemens.com/cs/ww/en/view/109754833) system manual ● ET 200SP distributed I/O system (https://support.industry.siemens.com/cs/ww/en/view/58649293) system manual ● CPU 1516pro-2 PN (https://support.industry.siemens.com/cs/ww/en/view/109482416) operating instructions You can find additional information on organization blocks and their priorities for Motion Control in the S7-1500T Motion Control (https://support.industry.siemens.com/cs/ww/en/view/109481326) function manual.

  • Page 17: Overload Behavior

    Program execution 2.2 Overload behavior Overload behavior CPU overload behavior An occurring event triggers the execution of the associated OB. Depending on the OB priority and the current processor load, a time delay may occur before the OB is executed when there is an overload.
  • Page 18 Program execution 2.2 Overload behavior Events to be queued The OB parameter "Events to be queued" is used to specify how many similar events the operating system places in the associated queue and therefore post-processes. If this parameter has the value 1, for example, exactly one event is stored temporarily. If the maximum number of similar start events is reached in the queue, each additional start event is only counted and subsequently discarded.
  • Page 19 Program execution 2.2 Overload behavior Example 1 The following example shows the response of the CPU when multiple similar events occur faster than the CPU can process the associated OBs. In example 1, the user selected the following parameter assignment: Figure 2-2 Example of parameter assignment for the overload behavior The figure below shows the processing sequence as soon as an event calls an associated...
  • Page 20 Program execution 2.2 Overload behavior Example 2 In example 2, the user has selected the following parameter assignment: Figure 2-4 Example of parameter assignment for the overload behavior Contrary to example 1, the CPU in example 2 requests a time error as soon as the configured event threshold has been exceeded.

  • Page 21: Cyclic Program Execution

    S7-1500 automation system (for example, it does not support PROFIBUS DP, central I/O, web server, etc.). The restrictions are described in the S7-1500R/H redundant system (https://support.industry.siemens.com/cs/ww/en/view/109754833) system manual. Cycle and response times Function Manual, 10/2018, A5E03461504-AD...

  • Page 22: Cycle

    Cyclic program execution 3.1 Cycle Cycle Definition of cycle A cycle includes the following sections: ● Update of process image partition 0 of the outputs (PIPQ 0) ● Automatic update of the process image partition 0 of the inputs (PIPI 0) ●...
  • Page 23 Cyclic program execution 3.1 Cycle The figure below illustrates the phases that are passed through during a cycle. In the example below the user has configured a minimum cycle time. Updating of the process image partitions and processing of the cyclic program is completed before the end of the configured minimum cycle time.
  • Page 24 Cyclic program execution 3.1 Cycle Cycle control point When the cycle control point is reached, the CPU has completed the cycle program and is no longer executing OBs. All user data are consistent at this time. Requirement is that no communication that modifies user data (such as HMI communication or PUT/GET communication) is active.

  • Page 25: Cycle Time

    Cyclic program execution 3.2 Cycle time Cycle time Definition of cycle time The cycle time is the time the CPU needs for: ● Updating the process image inputs/outputs ● Executing the cyclic program ● All program parts and system activities interrupting this cycle ●...
  • Page 26 Cyclic program execution 3.2 Cycle time Causes of different cycle times The figure below shows the different cycle times T and T using an example. cyc1 cyc2 Because the cyclic program is interrupted by a cyclic interrupt OB in this example (for example: OB 30), the cycle time T is greater than T .
  • Page 27 Cyclic program execution 3.2 Cycle time Minimum cycle time In STEP 7, you can set a minimum cycle time for a CPU. The default for the minimum cycle time is one millisecond. It is advisable to increase this setting in the following cases: ●...
  • Page 28 Cyclic program execution 3.2 Cycle time Cycle time statistics You can read the cycle time statistics either directly from STEP 7 ("Online tools" task card) or with the "RT_INFO" instruction. You can use the "RT_INFO" instruction to generate statistics in STEP 7 on the runtime of specific organization blocks for communication or for the user program.

  • Page 29: Influences On The Cycle Time

    Cyclic program execution 3.2 Cycle time Reference Additional information on the "RT_INFO" instruction is available in the STEP 7 online help. 3.2.2 Influences on the cycle time 3.2.2.1 Update time for process image partitions Estimating update time for process image partitions The update time of the process image partitions depends on the volume of assigned central and distributed I/O module data.
  • Page 30 Cyclic program execution 3.2 Cycle time Update times of the process image partitions The following table contains the times for estimating the typical update times of the process image partitions. Table 3- 1 Data for estimating the typical update time of the process image partitions Components Update times of the CPUs S7-1500...
  • Page 31 Cyclic program execution 3.2 Cycle time Components Update time of the CPU ET 200SP 1510SP(F)-1 PN 1512SP(F)-1 PN 1515SP(F)-PC Basic load for 60 μs 60 μs 30 μs updating process image partitions Copy time for 0.5 μs/word 0.5 μs/word 0.5 μs/word central I/O Copy time for 0.5 μs/word...

  • Page 32: User Program Execution Time

    Cyclic program execution 3.2 Cycle time 3.2.2.2 User program execution time Introduction Organization blocks or system activities with higher priority interrupt organization blocks or system activities with lower priority, and thus extend their runtime. Program execution time without interruptions The user program has a certain runtime without interruptions. The runtime depends on the number of operations that are executed in the user program.
  • Page 33 Cyclic program execution 3.2 Cycle time ET 200SP 1510SP(F)-1 PN 1512SP(F)-1 PN 1515SP(F)-PC Bit operations, 72 ns 48 ns 30 ns typ. Word operations, 86 ns 58 ns 36 ns typ. Fixed-point arith- 115 ns 77 ns 48 ns metic, typ. Floating-point 461 ns 307 ns...
  • Page 34 Cyclic program execution 3.2 Cycle time Extension due to nesting of higher-priority OBs and/or interrupts The interruption of a user program at the end of an instruction by a higher-priority OB causes a certain basic time expenditure. Take account of this basic time expenditure in addition to the update time of the assigned process image partitions and the execution time of the contained user program.
  • Page 35 Cyclic program execution 3.2 Cycle time ET 200pro 1516pro(F)-2 PN Hardware interrupt 80 μs Time-of-day interrupt 80 μs Time-delay interrupt 80 μs Cyclic interrupt 80 μs Table 3- 4 Basic time expenditure for an error OB S7-1500 1511(F)-1 PN 1515(F)-2 PN 1517(F)-3 PN/DP 1518(F)-4 PN/DP 1511T(F)-1 PN...
  • Page 36 (http://support.automation.siemens.com/WW/view/en/58649293) system manual ● CPU 1516pro-2 PN operating instructions (https://support.industry.siemens.com/cs/ww/en/view/109482416) You can find additional information on the topic of the complete cycle time of a program in an FAQ on the Internet (https://support.industry.siemens.com/cs/ww/en/view/87668055). Cycle and response times Function Manual, 10/2018, A5E03461504-AD...

  • Page 37: Extension Of Cycle Time Due To Communication Load

    Cyclic program execution 3.2 Cycle time 3.2.2.3 Extension of cycle time due to communication load Impact of communication on the cycle time In the sequence model of the CPU, communication tasks are processed with priority 15. All program parts with priority > 15 (e.g. for Motion Control functions) are unaffected by communication.
  • Page 38 Cyclic program execution 3.2 Cycle time Dependency of maximum cycle time on the configured communication load The diagram shows the nonlinear relationship between maximum cycle time and configured communication load with a pure cycle time of 10 ms. No interruptions occur in the example. ①...

  • Page 39: Special Consideration When Profinet Io Communication Is Configured On The 2Nd Profinet Interface (X2)

    Cyclic program execution 3.2 Cycle time Effect on the actual cycle time Communication is only one cause of extension of the cycle time. All configured events that extend the cycle time (e.g. hardware interrupts) mean that more asynchronous events can occur within a cycle.
  • Page 40 Cyclic program execution 3.2 Cycle time Reducing additional system load You reduce the communication load at the 2nd PROFINET interface, e.g. with: ● Fewer HMI devices or slower update cycles of the HMI devices ● Less or slower communication with other CPUs Increase the update times in STEP 7 for all IO devices that are assigned to the 2nd PROFINET interface (X2): 1.

  • Page 41: Time-Driven Program Execution In Cyclic Interrupts

    Cyclic program execution 3.3 Time-driven program execution in cyclic interrupts Time-driven program execution in cyclic interrupts With a cyclic interrupt you have the option of having a specific OB processed in a time interval. The time interval is independent of the execution time of the cyclic program. A priority from 2 to 24 can be selected for the cyclic interrupt.
  • Page 42 Cyclic program execution 3.3 Time-driven program execution in cyclic interrupts Accuracy of a cyclic interrupt Even if a cyclic interrupt is not delayed by a higher-priority OB or communication activities, the accuracy with which it is started is nevertheless subject to system-dependent fluctuations.

  • Page 43: Response Time For Cyclic And Time-Driven Program Execution

    Cyclic program execution 3.4 Response time for cyclic and time-driven program execution Response time for cyclic and time-driven program execution Introduction In this section you learn: ● How the response time is composed ● How to calculate the response time Definition The response time in the case of cyclic or time-controlled program execution is the time between the detection of an input signal and the change of a connected output signal.
  • Page 44 Cyclic program execution 3.4 Response time for cyclic and time-driven program execution Factors To determine the process response time, you must take account of the following factors in addition to the CPU response time described above: ● Delay of the inputs and outputs at the I/O module ●...
  • Page 45 Cyclic program execution 3.4 Response time for cyclic and time-driven program execution Update time of the backplane bus for ET 200SP CPUs The following table shows the central (typical) update times of the backplane bus for the ET 200SP CPUs. Table 3- 6 Update time of the ET 200SP CPUs Update time of the CPU...

  • Page 46: Summary Of Response Time With Cyclic And Time-Controlled Program Execution

    ● Application example for determining the response time for PROFINET (http://support.automation.siemens.com/WW/view/en/21869080) ● Transmission times and isochronous mode in function manual PROFINET with STEP 7 V15 (http://support.automation.siemens.com/WW/view/en/49948856); see also the section "Tips on assembly" ● Transmission times and isochronous mode in function manual PROFIBUS with STEP 7 V15 (http://support.automation.siemens.com/WW/view/en/59193579);...
  • Page 47 Cyclic program execution 3.5 Summary of response time with cyclic and time-controlled program execution Estimation of the longest response time The longest response time is the sum of: 1 x delay of the input/output module for inputs + 2 x (update PROFINET IO or PROFIBUS DP)*; (update time of the backplane bus for the ET 200SP CPUs) + 2 x transfer time of the process image input + 2 x execution of the user program...

  • Page 48: Event-Driven Program Execution

    Event-driven program execution Response time of the CPUs when program execution is event- controlled Introduction Hardware interrupts are used to detect events in the process in the user program and to react to them with an appropriate program. In STEP 7, the organization blocks OB 40 to OB 47 are intended for processing hardware alarms.
  • Page 49 Event-driven program execution 4.1 Response time of the CPUs when program execution is event-controlled Interrupt response times of the CPUs for hardware interrupts The interrupt response time starts with the occurrence of a hardware interrupt event in the CPU. The interrupt response time ends with the start of processing of the assigned hardware interrupt OB.

  • Page 50: Process Response Time When Program Execution Is Event-Driven

    You can find additional information on determining response times for PROFINET in the application example with the entry ID 21869080 on the Service&Support (http://support.automation.siemens.com/WW/view/en/21869080) Internet page. Influence of input modules on the interrupt response times of hardware interrupts Digital input modules:...
  • Page 51 Event-driven program execution 4.2 Process response time when program execution is event-driven The following figure shows the individual execution steps for event-driven program execution. Figure 4-1 Schematic representation of event-driven program execution Cycle and response times Function Manual, 10/2018, A5E03461504-AD...

  • Page 52: Cycle And Response Times Of The S7-1500R/H Redundant System

    Cycle and response times of the S7-1500R/H redundant system Introduction CPUs of the S7-1500R/H redundant system are designed as being redundant. The goal of the redundant configuration is to avoid production downtimes. When a CPU fails, the other CPU maintains control over the process. Compared to non-redundant CPUs, the CPUs of the S7-1500R/H redundant system have the following special features: ●...

  • Page 53: Maximum Cycle Time And Time Errors

    Cycle and response times of the S7-1500R/H redundant system 5.2 Maximum cycle time and time errors Maximum cycle time and time errors Maximum cycle time As with non-redundant CPUs, you can parameterize a high limit of the cyclic program by setting the maximum cycle time.
  • Page 54 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Time error As with non-redundant CPUs, you can specify the response to a time error for the CPUs of the S7-1500R/H redundant system. In RUN-Solo system state, the redundant CPUs behave like non-redundant CPUs when the maximum cycle time is exceeded (see section Cycle time (Page 24)).

  • Page 55: 5.3 Influences On The Cycle Time Of The S7-1500R/H Redundant System

    Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Influences on the cycle time of the S7-1500R/H redundant system 5.3.1 Influences on the cycle time in RUN-Solo system state RUN-Solo system state In RUN-Solo system state, the primary CPU is in RUN operating state.

  • Page 56: Influences On The Cycle Time In Syncup System State

    Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system 5.3.2 Influences on the cycle time in SYNCUP system state SYNCUP system state In SYNCUP system state, the primary CPU is in RUN-Syncup operating state. The backup CPU is in SYNCUP operating state.
  • Page 57 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system In SYNCUP system state, all relevant data is synchronized from the primary CPU to the backup CPU. At the end of SYNCUP, the backup CPU makes up the time lag to the primary CPU caused by the synchronization.
  • Page 58 An overview of all reasons for the cancellation of the SYNCUP and remedial measures is available in the system manual S7-1500R/H redundant system (https://support.industry.siemens.com/cs/ww/en/view/109754833). Disable SYNCUP To avoid the described effects of the SYNCUP on the cycle times during critical process states, use the instruction "RH_CTRL".
  • Page 59 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Minimum cycle time It is often necessary to set a longer minimum cycle time for the CPUs of the S7-1500R/H redundant system than for those of the non-redundant CPUs.

  • Page 60: Influences On The Cycle Time In Run-Redundant System State

    Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system 5.3.3 Influences on the cycle time in RUN-Redundant system state RUN-Redundant system state In RUN-Redundant system state, the primary CPU guides the process. The primary CPU continuously synchronizes itself with the backup CPU.
  • Page 61 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Extension of the cycle As with non-redundant CPUs, an occurring event and the associated OB can extend the cycle. Events can occur both during the execution of the cyclic program and during the time lag.
  • Page 62 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Execution of the cyclic program (CP with priority 1) is complete. While the primary CPU waits for the end of the cycle of the backup CPU, a higher priority OB (OB 30 with priority 7) starts. The primary CPU starts the next cycle as soon as the following conditions have been fulfilled: ●...
  • Page 63 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Differences between the synchronization times The available bandwidth has a significant impact on the synchronization time. With the R-CPUs both the synchronization of data and the synchronization of communication tasks operate over the PROFINET ring.

  • Page 64: Influences On The Cycle Time When A Cpu Fails

    CPUs in the event of an error (failure of one of the CPUs). Information on the causes for the failure of a CPU is available in the S7-1500R/H redundant system (https://support.industry.siemens.com/cs/ww/en/view/109754833) system manual. Cycle and response times Function Manual, 10/2018, A5E03461504-AD...
  • Page 65 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Failure of the primary CPU The figure below shows the impact of the failure of the primary CPU on the cycle time. ①...
  • Page 66 Cycle and response times of the S7-1500R/H redundant system 5.3 Influences on the cycle time of the S7-1500R/H redundant system Failure of the backup CPU The figure below shows the impact of the failure of the backup CPU on the cycle time. ①...

  • Page 67: Response Time Of R/H Cpus

    Cycle and response times of the S7-1500R/H redundant system 5.4 Response time of R/H CPUs Response time of R/H CPUs Relationship between the cycle time and response time The cycle time of the system also forms the basis for its response time. The response time depends, among other things, on the cycle time of the individual program cycles.
  • Page 68 Cycle and response times of the S7-1500R/H redundant system 5.4 Response time of R/H CPUs In the figure below, the process image has already been updated by the time of the signal change. It therefore takes one cycle until the system detects the change and sets the input in the process image.
  • Page 69 Display of measurements (traces) which record special time-critical signal char- Function manual Using the trace and acteristics logic analyzer functions (http://support.automation.siemens.com/ WW/view/en/64897128) Reading out the progress of the SYNCUP system state using the display of the S7-1500R/H redundant system (https://support.industry.siemens.com/c...

  • Page 70: Timetables For The Run-Redundant System State

    Cycle and response times of the S7-1500R/H redundant system 5.5 Timetables for the RUN-Redundant system state Timetables for the RUN-Redundant system state The following section describes the typical times of the CPUs of the S7-1500R/H redundant system in the RUN-Redundant system state. Update times of the process image partitions The following table contains the times for estimating the typical update times of the process image partitions.
  • Page 71 Cycle and response times of the S7-1500R/H redundant system 5.5 Timetables for the RUN-Redundant system state Extension due to nesting of higher-priority OBs and/or interrupts The interruption of a user program at the end of an instruction by a higher-priority OB causes a certain basic time expenditure.
  • Page 72 Cycle and response times of the S7-1500R/H redundant system 5.5 Timetables for the RUN-Redundant system state Accuracy of a cyclic interrupt Even if a cyclic interrupt is not delayed by a higher-priority OB or communication activities, the accuracy with which it is started is nevertheless subject to system-dependent fluctuations.

  • Page 73: Glossary

    Glossary Backup CPU Role of a CPU in the S7-1500R/H redundant system. If the R/H system is in RUN-Redundant system state, the primary CPU guides the process. The backup CPU processes the user program synchronously and can take over the process management if the primary CPU fails. Cycle time The cycle time represents the time a CPU requires to process the user program once.
  • Page 74 Glossary Firmware of the CPU In SIMATIC, a distinction is made between the firmware of the CPU and user programs. The firmware is a software embedded in electronic devices, which means it is permanently connected with the hardware functionally. It is usually saved in a flash memory, such as EPROM, EEPROM or ROM, and cannot be replaced by the user or only with special means or functions.
  • Page 75 Glossary Interrupt, time-delay The time-delay interrupt is one of the program execution priority classes of SIMATIC S7. The time-delay interrupt is generated after the expiration of a timer started in the user program. The CPU then processes the corresponding organization block. Interrupt, time-of-day The time-of-day interrupt is one of the program execution priority classes of SIMATIC S7.
  • Page 76 Glossary Parameters, static Static parameters of modules cannot be changed by the user program but only by the configuration in STEP 7, e.g. input delay of a digital input module. Primary CPU If the R/H system is in RUN-Redundant system state, the primary CPU guides the process. The backup CPU processes the user program synchronously and can take over the process management if the primary CPU fails.
  • Page 77 Glossary Redundant systems Redundant systems are identified by the fact that important automation components are available in multiple units (redundant). If one redundant component fails, control of the process is maintained. Retentivity A memory area whose content is retained even after a power failure and after a transition from STOP to RUN is retentive.

  • Page 78: Index

    Index Cycle Maximum cycle time, 26, 37, 52 Definition, 21 Minimum cycle time, 22, 26, 58 Cycle control point, 23 Cycle time Definition, 24 Different, 25 OB 80 Process image partition, 28 Time error OB, 26 Update, 28 Cycle time statistics, 27 Parameter Enable time error, 17 Dead time, 52, 63...
  • Page 79 Index Time error OB OB 80, 26, 53 Times Basic expenditure for error OB, 34, 70 Basic expenditure for interrupts, 33, 70 Cyclic interrupts for S7-1500 CPUs, 41 Cyclic interrupts for S7-1500R/H-CPUs, 71 For one operation, 31, 34, 34, 35, 35, 70 Update times Backplane bus ET 200SP CPUs, 44 PROFIBUS DP, 43...

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