Issue
The ACX 57xx series controller supports up to 2 xP or xPB (bi-directional) expansion modules, plus a display for extended input and output configurations. The ACX 57xx series controller is compatible with all of the TAC expansion modules. For more information about expansion modules, see the xP Expansion Module Reference, 30-3001-840 and/or the xPB Expansion Module Reference, 30-3001-883.
What are the valid channel numbers for expansion IO on the ACX5740/5720?
Environment
CyberStation
ACX5740
ACX5720
Cause
The expansion IO channel number assignments is different in the ACX5720 due to the fact that it has only half the onboard IO as the ACX5740
Resolution
The ACX5740 has 12 onboard inputs and 4 onboard outputs, therefore the first expansion input channel is 13 and the first expansion output channel is 5
The ACX5720 has 6 onboard inputs and 2 onboard outputs, therefore the first expansion input channel is 7 and the first expansion output channel is 3
