I/O 1000 EtherCAT bus coupler sporadically reports 'inconsistent settings' (corrected from EPM-S131)

Corrected from:

I/O1000 Bus coupler EPM-S131 (from V40)

Behaviour of new version:

The behaviour described no longer occurs. The alarms no longer have to be deactivated when using the EPM-S131 bus coupler.

What happens?

The Lenze EtherCAT master does not switch the EtherCAT EPM-S130 bus coupler to 'Operational' and, thus, does not change to 'Operational' either. The following message is entered into the PLC logbook:
EPM_S130 (EtherCAT address): Slaves signals Error. AL Status: 'PRE OPERATIONAL' (0x12), AL Status Code: 'Unknown Text' (0x26)

When does this behaviour occur?

If analog I/O modules (EPM-S40x) are connected on the backplane bus of the EtherCAT EPM-S130 bus coupler and their inputs are not interconnected, the EtherCAT bus coupler sporadically reports the AL status code 0x26 (= 'inconsistent settings') when the EtherCAT master is started. As a consequence, neither the EtherCAT slave nor the EtherCAT master change to 'Operational'.

Which products are affected?

I/O 1000 EPM-S130 bus coupler from firmware V2.8 with analog EPM-S40x input modules

c300 controller

3200 C controller

p300 panel controller

p500 panel controller

Short-term measures:

Deactivate the open-circuit monitoring at the analog EPM-S40x I/O modules via the corresponding parameter or interconnect the free inputs of the I/O modules.

For this purpose, the parameters of all EPM-S40x analog I/O modules are set to the following values (if these parameters are available):
0x310x Subindex 1: Disable
0x310x Subindex 2: 0

Evaluation/recommendations:

In the case of free inputs of the analog I/O 1000 modules, the EtherCAT master may not change to 'Operational'. An applicative solution is described under 'Short-term measures'.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201304778/1/