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Appendix G MSG-SND/MSG-RCV Functions (Ethernet)
G.2 Message Receive Function (MSG-RCV)
A-102
( 5 ) Option (PARAM03)
A unique value is output for each communication device.
Not used for the MELSEC protocol.
( 6 ) Function Code (PARAM04)
Received function code is output.
The following table lists the function codes available when using the MELSEC protocol.
Note: 1. B: Bit type, W: Integer type
2. AnCPU dedicated commands are not supported. Commands for extended file register are not sup-
ported.
( 7 ) Data Address (PARAM05)
A data address requested from the transmission side is output.
( 8 ) Data Size (PARAM06)
The read/write data size (number of bits or words) requested from the transmission side is output.
( 9 ) Remote CPU Number (PARAM07)
Refer to G.2.4 Function Setting and Parameter Details for MEMOBUS and Extended MEMOBUS Protocols.
Table G.24 Function Code List (MELSEC)
Function Code
MELSEC ACPU
Common Command
Targ e t Data
Type
Function
01H/02H
00H B
Reads bit device in units
03H/04H/09H/0AH
01H W
Reads word device in units
05H/0FH
02H B
Writes to bit device in units
06H/0BH/10H
03H W
Writes to word device in units
08H
16H
Loopback test
0EH
05H B
Specifies a device number for each word device at random
and sets/resets each word device
31H
60H W
Writes to the fixed buffer in words
32H
61H W
Reads from the random access buffer in words (unable to
receive for MP2000 series)
33H
62H W
Writes to the random access buffer in words
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