YASKAWA JEPMC-MP2300S-E, User Manual

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A-92
Note: 1. In MP9 0/MP2 00 series, the data storage area for the write request from the transmission side is
the M register.
2. The write range parameter enables you to specify the range of the M register which permits writing
messages.
The following table indicates the write range parameters.
Specify the write range so that the expression below is met:
0
≤
Write range LO
≤
Write range HI
≤
Maximum address of M register
This write range is effective for the following function codes:
05H (changes single coil state)
06H (writes to single holding register)
0BH (writes to holding register (write))
0FH (changes multiple coil states)
10H (writes to multiple holding registers)
16H (mask writes to holding register)
17H (reads/writes multiple holding registers)
Example: When setting the address of the M register which permits writing to 1000 to 1999:
PARAM12=1000
PARAM12=1000
PARAM13=1999
The reception side will return an error against a write request to an address other than MW01000 to
MW01999, and will not write it.
( 12 ) Reserved by System 1 (PARAM14)
Used by system (the channel number of the communication buffer in use is stored).
Note: At the first scan during power up, make sure to set this to “0” by user program. After that, the register is
used by system, so do not change the value with the user program.
( 13 ) Reserved by System 2 (PARAM15, PARAM16)
Used by system. Do not change the value with the user program, etc.
Table G.31 Write Range Parameter List
Parameter Contents Description
PARAM12 Write range LO Start address of the write range
PARAM13
Write range HI Last address of the write range