I using a DIGI IAP as a protocol converter To connect ControlLogix to Modbus slaves.
I am trying to write a single bit to coil 0x00813, and if I understand correctly it should have the SLC5 notation B10:50 and the string ‘/12=1’. Instead it writes to coil 0x00811. ‘/13=1’ also writes incorrectly to coil 0x00812, however alll other neighboring coils write predictably.
ie: /8 to bit 9
/9 to bit 10
/10 to bit 11
/14 to bit 15
/15 to bit 16.
As far as I can tell, I can write a single bit to any coil and the addressing behaves normally, except for those 2 coils. Is this a bug or is there something in my setup that could be causing this behaviour?
Thanks.