Error handling and diagnostics
EL675284 Version: 2.1
7.2 EL6752/-0010 diagnostics
The EL6752/-0010 feature various diagnostic variables that describe the state of the terminal and the
DeviceNet and can be linked in the PLC:
We recommend monitoring the following process data during each cycle:
• WcState: if ≠ 0, this EtherCAT device does not take part in the process data traffic
• State: if ≠ 8, the EtherCAT device is not in OP (operational) status
We recommend monitoring the following process data:
• Error: if ≠ 0, the indicated number of DeviceNet devices has a BoxState not equal zero, i.e.
check which DeviceNet devices are not operating correctly in the bus
• DiagFlag: indicates pending diagnostic data
7.2.1 EL6752/-0010 - WC-State
For monitoring the EtherCAT communication the WC state (working counter) of the EL6752/-0010 must be
checked. If the WC state is not equal "0" the EtherCAT communication is disturbed, i.e. data sent to the
slave or the master are no longer transferred correctly and are not valid.
Fig.71: WCState in the TwinCAT tree
WcState
0: data are valid
1: data are not valid, problem in the EtherCAT communication
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