The error LED is on and the history contains the message XOB 20 / 25 missing

FAQ #100690

XOBs 20 and 25 are called when interrupt input INB1 or INB2 of the PCD1/2 has detected a rising edge.


Obviously XOB 20/25 are called and they are not programmed. The PCD has detected a rising edge on INB1/INB2.

If the interrupt inputs are used XOB20/25 has to be programmed otherwise this will generate an error. If the interrupt inputs are not used and there is a history entry anyway it can be that the PCD detects a rising edge do to disturbances.

If the interrupt inputs are used, programm the XOB 20 /25.
If the interrupt inputs are not used, connect the INB1 and INB2 to the GND to avoid disturbances




Last update: 29.05.2015 02:51

First release: 08.02.2007 10:13

Views: 1428

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.