Service and maintenance
5.2 Diagnostics
SIMATIC RF120C
Operating Instructions, 02/2021, C79000-G8976-C328-03
29
5.2 Diagnostics
The diagnostics options are limited
Error messages that the RF120C communications module forwards automatically to the
SIMATIC controller are not evaluated by S7-1200 controllers with firmware version 4.0. For
this reason error messages from the communications module are displayed neither on the
controller nor in the TIA Portal. This error eliminated by an update of the SIMATIC controller.
The error display using the function block is not affected by this restriction in diagnostics.
You have the following diagnostics options available for the module:
• The LEDs of the module
For information on the LED displays, refer to the section "LED status display on the RF120C
(Page 27)".
• STEP 7 Basic / Professional using the TIA Portal: Diagnostics functions in the "Online &
diagnostics" menu
Here, you can obtain static information on the selected module:
– General information on the module
– Diagnostics status
• Evaluation with the standard "GET_DIAG" instruction
• Evaluation based on the "ERROR" and "STATUS" output parameters
You can find information on the parameters in the section "Error messages (Page 31)".
Diagnostics with the TIA Portal (STEP 7 Basic / Professional)
Requirements
STEP 7 Basic / Professional is installed and started, and a project is open. The communications
module is installed in the SIMATIC S7-1200 controller and connected.
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