Allen-Bradley MicroLogix 1400 Instruction Manual page 83

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General Channel Status Block
Word Bit Description
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 to 4 Reserved – Always zero
5 SNMP Server Status
This bit is set (1) when the SNMP server is enabled. The cleared bit (0) means that the SNMP server is disabled.
6 HTTP Server Status
This bit is set (1) when the internal web server is enabled. The cleared bit (0) means that the internal web server is
disabled.
7 SMTP Client Status
This bit is set (1) when the SMTP client (for email) is enabled. The cleared bit (0) means that the SMTP client is
disabled.
8...15 Reserved – Always zero
Function Files
Publication 1766-RM001A-EN-P - October 2008
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