Diagnostics; Diagnostics Via The Display Elements Of The Cp - Siemens SIMATIC S7 Manual

6

Diagnostics

Diagnostic
Function
Display Elements
(LED)
STATUS Output of
the FB
MODBUSCP
6.1

Diagnostics via the Display Elements of the CP

Display Functions
OPEN MODBUS / TCP communication via CP343-1 and 443-1
2XV9450-1MB00; Manual edition 4.3
The diagnostic functions of the CP 343/ CP 443 allow you fast failure
localization. The following diagnostic features are available:
• Diagnostics via the display elements of the CP
• Diagnostics via the STATUS output of the function block MODBUSCP.
The display elements inform you about the operating mode or about the
failure conditions of the CP. The display elements give you an overview of
internal failures, external failures and interface specific failures.
For error diagnostics, the function block MODBUSCP has got a STATUS
output. By reading the STATUS output you get a general indication of failures
that have occurred during the communication. The STATUS parameter can
be evaluated in the user program.
The output STATUS_FUNC shows the name of the function, which has
caused the error.
The display elements of the CP give you information on the module status.
There are two types of display functions:
•
Group Error Displays
- INTF Internal failure
- EXTF External failure
•
Special Displays
CP 343-1:
- RX/TX A telegram is being transmitted via the interface.
CP 443-1:
- TXD A telegram is being sent via the interface.
- RXD A telegram is being received via the interface.
A detailed description of the display elements can be found in the device
manual of the CP.
Diagnostics
6-1