In preparation to migrate from PLC5 to ControlLogix, we are moving our PLC into a separate chassis, using a 1771-ASB in its place in the former rack 0&1 chassis. The ASB has been assigned to new contiguous rack numbers.
We added the new ASB to RIO channel 2B (230.4 kbaud) and the active light was off. We tried two other ASB modules and got the same results.
Out of desperation, we moved the rack over to RIO Channel 1B (57.1 kbaud) and the green active light came on.
Now the great mystery is... why doesn't this work at the higher baud rate???
This chassis contains several analog & specialty modules, including 1771-OFE2, 1771-IFE, 1771-NOC, 1771-NR & 1771-VHSC. I'm used to having these modules only in the local rack. Are one or more of these unable to work at 230kb? Any other thoughts?
Thanks in advance.
We added the new ASB to RIO channel 2B (230.4 kbaud) and the active light was off. We tried two other ASB modules and got the same results.
Out of desperation, we moved the rack over to RIO Channel 1B (57.1 kbaud) and the green active light came on.
Now the great mystery is... why doesn't this work at the higher baud rate???
This chassis contains several analog & specialty modules, including 1771-OFE2, 1771-IFE, 1771-NOC, 1771-NR & 1771-VHSC. I'm used to having these modules only in the local rack. Are one or more of these unable to work at 230kb? Any other thoughts?
Thanks in advance.