ProSoft Technology CLX-APACS - Manual (Page 45)

QTS-CLX-APACS Page 39
In monitor mode, the bits do not update and are always 0. Aliases to the bits are provided
by the configuration tool for compatibility with master mode.
Aliases for these bits have names like
APACS_SlotStatus_R01S04
for the bit associated with the module in rack 1 slot 4.
Use the aliases to access the status bits.
TIP
If the ControlLogix loses communication with the QTS-CLX-APACS, it
sets the first four bytes of connection 0 to FF hexadecimal (11111111
binary).
Monitor these four bytes to determine if there is a problem.
Diagnostic Counters
Refer to page 18 for details about monitor mode diagnostic counters.
Refer to page 31 for details about master mode diagnostic counters.