Corrected from:
Profibus E94AYCPM communication module FW 1.21
Behaviour of the new version:
Profibus I&M0 data is already compiled during the module initialisation and immediately available after enabling the fieldbus communication module.
What happens?
So far, the I&M data has been compiled on request of the master. Due to internal processing times, the module sporadically reported Profibus error messages (5 = State conflict) to the master. With the S7, this led to an empty display window when querying the module state of the device.
When does this behaviour occur?
The problem occurs when the Profibus master queries the I&M data very shortly after starting the Profibus system.
Which products are affected?
Profibus E94AYCPM communication module FW 1.00, 1.05,1.10,1.11, and 1.20
Short-term measures:
None
Evaluation/recommendations:
I&M data is pure diagnostic data and does not impair cyclic process data communication.
