Publication 1747-RM001G-EN-P - November 2008
12-4 SLC Communication Instructions
The following status bits let you customize or monitor communications
servicing.
Channel Servicing
Whether you select a channel to be serviced by the SVC instruction or not,
that channel is still serviced normally at the end of the scan.
Table 12.2 Status Bits for Customizing Communication Servicing
Channel 1
Channel 0
(1)
(1)
SLC 5/03 and higher processors only.
S:2/5 Incoming Command Pending Bit S:33/0 Incoming Command Pending Bit
S:2/6 Message Reply Pending Bit S:33/1 Message Reply Pending Bit
S:2/7 Outgoing Message Command
Pending Bit
S:33/2 Outgoing Message Command
Pending Bit
S:2/15 Communications Servicing
Selection Bit
S:33/5 Communications Servicing
Selection Bit
S:33/7
(1)
Message Servicing Selection Bit S:33/6 Message Servicing Selection
Bit
TIP
You may program the SVC instruction unconditionally
across the rungs. This is the normal programming technique
for the SVC instruction.
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