Multiple slave FCs on Module 1,01,02 slave 3: see slave report (Module 1,01,02 Header) for details
This message means that DBDOC's analysis of the configuration of your slave FC specs suggests that there may be a problem with too many slaves chained together or with more than one slave on the same channel.
In the example, you can see that Channel 17 has a problem. Two pairs of DIGRP: Digital Input Group [FC84] blocks (blocks 720/730 and 740/750) have the same slave address 17. 18 and higher are unused, so the solution probably involves configuring the second pair to be the next slave.
--Module 31,30,04 Slave Report Multiple slave FCs on Module 31,30,04 channel 17: see slave report for details.
This message is likely to show an error in the system configuration. It should be reviewed. The issue raised may be in unused logic or graphics, or have other realities that make it a non-issue.
Please contact us for help resolving your error messages.