Reading of input signals via extension board is incorrect (elimination)

Concerns the products:
EPL-10200 (Drive PLC Software Version 1.3) with

• EPZ-10201 (Extension Board 1)
• EPZ-10202 (Extension Board 2)
• EPZ-10203 (Extension Board 3)

Reactions when the problem occurs:
Drive PLC reads incorrect input signals from the inputs of the extension board fitted.

When does the problem occur?

• in the control configuration of Drive PLC an extension board has been selected although no extension board is fitted
• in the control configuration of Drive PLC a different extension board has been selected from the one which is actually fitted
• if the extension board has not been fitted properly (by the customer)

Possible diagnoses:
None

Quick remedy/recommendations:
By calling up the PLC program ExtensionCheck the user can integrate an additional monitoring function into his project. In the event of an exchange this may mean that an incorrect extension board or an incorrectly fitted extension board is detected. This PLC program is part of the library 'HardwareCheck.lib' and can be obtained from Lenze Customer Service.

The reaction to detection of an incorrect extension board then has to be effected by the user program. In the event of an error ExtensionCheck generates a trip with error number 401. Via input bPlcStop = TRUE processing of the user program than be stopped if an error occurs.

The program must not be called up in PLC_ColdStart because processing requires more than one PLC cycle.
Recommendation: Call up in PLC_PRG and process the user program only when a test has produced no errors.