scarter@ltsoftware.com

The MSG instruction is not required if you are using input and output assemblies.

The easiest way I have found to detect com loss to a 525 drive is to reset the "Ready" bit in the input structure for the drive.  If the ready bit stays "Off" then there is no communications with the drive. Use timers to trigger the reset of the "Ready" bit and to detect if the "Ready" bit has been off for long enough to signal a disconnection. I set the timer for reset of the ready bit at the connection update rate * 1.5 I then set the timer to test if the drive is disconnected (i.e. Ready bit not on) at the connection update rate * 4