2.4 Communications with MP-series Controllers
Message Functions
2-84
Option (PARAM11)
This code is not used for the Extended MEMOBUS protocol.
Function Code (PARAM12)
This parameter gives the function code that was received.
Note: B: Bit data, W: Integer data
Reserved for System (PARAM13)
This parameter is used by the system.
Function Code
Target
Data
Type
Function
Registers When Acting
as the Master
Send Registers
Receive
Registers
00 hex −
Not used for the Extended MEMOBUS
protocol.
MM
01 hex B Reads the states of coils.
02 hex B Reads the states of input relays.
03 hex W Reads the contents of hold registers.
04 hex W Reads the contents of input registers.
05 hex B Changes the state of a single coil.
06 hex W Writes to a single hold register.
07 hex −
Not used for the Extended MEMOBUS
protocol.
08 hex − Performs a loopback test.
09 hex W
Reads the contents of hold registers
(extended).
0A hex W
Reads the contents of input registers
(extended).
0B hex W Writes to hold registers (extended).
0C hex −
Not used for the Extended MEMOBUS
protocol.
0D hex W
Reads the contents of non-consecutive
hold registers (extended).
0E hex W
Writes to non-consecutive hold registers
(extended).
0F hex B Changes the states of multiple coils.
10 hex W Writes to multiple hold registers.
4341 hex B Reads the states of bits.
S, M, G, I, or O M or G
4345 hex B Changes the state of a single bit.
4346 hex W Writes to a single register.
4349 hex W Reads the contents of registers.
434B hex W Writes to multiple registers.
434D hex W
Reads the contents of non-consecutive
registers.
434E hex W Writes to non-consecutive registers.
434F hex B Changes the states of multiple bits.
Do not change the value of PARAM13 from a user program or by any other means.
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