Allen-Bradley MicroLogix 1100

Publication 1763-RM001B-EN-P - April 2007
Communications Instructions 369
PLC5 O, I, B, N 1-word 103
F
(2)
, L
2-word 51
T5-word20
ST
(1)
42-word 1
Modbus
Commands
B, N (command 5) 1-bit 1
B, N (command 6) 1-word 1
B, N
(commands 1, 2, and 15)
1-bit 1920 Modbus bit elements
(120 words)
(Commands 1 and 2 are read
only, 15 is write only.)
B, N
(commands 3, 4, and 16)
multi-register 120 Modbus register elements
(120 words)
(Commands 3 and 4 are read
only, 16 is write only.)
(1) MicroLogix 1100 Series B FRN 4 or later.
(2) Message Type must be 500CPU or PLC5. The Local File Type and Target File Type must both be Floating Point.
(3) MicroLogix 1100 OS Series A FRN3
Message Type File Type Element Size Maximum Number
of Elements per Message
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