PROFIBUS DP Communication
8.7 DP slave MCP 483
Manual
282 Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
PLC user program
If an MCP is connected via PROFIBUS DP, the basic PLC program does not check for
module failure.
In this case the MCP is monitored by a standard mechanism to monitor the active DP slave:
● PLC operating system
● PROFIBUS controller
On detecting a failure of an MCP 483 DP slave, the PLC is switched to the STOP state by
default.
Customized response
The following organization blocks can be added to the PLC user program to customize the
response to a DP slave MCP 483 failure:
● OB 82: Diagnostic interrupt
● OB 86: Rack failure
Please refer to the corresponding SIMATIC literature for details of linking organization blocks
and evaluating diagnostic data.
NOTICE
No alarm is initiated by the basic PLC program if there is a failure of an MCP connected via
PROFIBUS. The triggering of a corresponding alarm is the sole responsibility of the user
(machine manufacturer).
To Next Page
Loading...
