Publication 1766-RM001A-EN-P - October 2008
64 Function Files
General Status Block of Communications Status File
General Channel Status Block
Word Bit Description
0 - Communications Channel General Status Information Category Identifier
Code
1 - Length
2 - Format Code
3 - Communications Configuration Error Code
4 0 ICP – Incoming Command Pending Bit
This bit is set (1) when the controller determines that another device has
requested information from this controller. Once the request has been
satisfied, the bit is cleared (0).
1 MRP – Incoming Message Reply Pending Bit
This bit is set (1) when the controller determines that another device has
supplied the information requested by a MSG instruction executed by this
controller. When the appropriate MSG instruction is serviced (during
end-of-scan, SVC, or REF), this bit is cleared (0).
2 MCP – Outgoing Message Command Pending Bit
This bit is set (1) when the controller has one or more MSG instructions
enabled and in the communication queue. This bit is cleared (0) when the
queue is empty.
3 SSB – Selection Status Bit
This bit indicates that the controller is in the System Mode. It is always set.
4 CAB – Communications Active Bit
This bit is set (1) when at least one other device is on the DH-485 network.
If no other devices are on the network, this bit is cleared (0).
5…14 Reserved
15 Communications Toggle Push Button Communications Defaults Active. This
bit is set (1) whenever Channel 0 is in the default communications mode.
The bit is cleared (0) when Channel 0 is in user configured communications
mode.
5 0…7 Node Address - This byte value contains the node address of your controller
on the network.
8…15 Baud Rate - This byte value contains the baud rate of the controller on the
network.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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