Diagnosis Via The Display Elements Of The Plc - Siemens SIMATIC S7 Manual
S7 open modbus / tcp
communication via the
integrated pn interface of the plc
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Also See for SIMATIC S7:
- System manual (866 pages) ,
- Functional safety manual (212 pages) ,
- User manual (134 pages)
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7.1
Diagnosis via the Display Elements of the PLC
Display Functions
MODBUS / TCP communication via the integrated PN interface of the CPU
2XV9450-1MB02; Manual edition 2.1
The display elements of the PLC provide information on the status of the
component. There are two types of display functions:
•
Group Error Displays
PN CPU 300
- SF
Group error
When this LED is flashing, the Modbus block has not been licensed yet.
You can find further information in section 5 "Licensing".
PN-CPU 400
- INTF
Internal error
When this LED is flashing, the Modbus block has not been licensed yet.
You can find further information in section 5 "Licensing".
•
Special Displays
PN CPU 300, PN CPU 400 and IM 151-8 PN/DP CPU:
- RX/TX a telegram is transferred via the integrated interface
A detailed description of the display elements can be found in the device
manual of the PLC.
Diagnosis
7-2
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