Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
622 Protocol Configuration
87 Negative Acknowledge The slave cannot perform the program function received in the
command.
7
88 Memory Parity Error The slave attempted to read extended memory, but detected a
parity error in the memory.
8
89 Non-standard Error Code An error code greater than 8 was returned by the slave. >8
Modbus Error Codes in Modbus RTU Master MSG Instruction
Error
Code
Error Description Received
Exception Code
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes