YASKAWA
SIEP C730600 0NA MECHATROLINK-4 Technical Manual
43
NOP Response
Byte
Command
Description
・
Ofs+31
◆
PRM_RD: 01 (Hex.) (Read Parameter Command)
The PRM_RD command reads the data for SIZE from the MEMOBUS/Modbus register number specified by NO.
You can use the command in communication phases 2 and 3. This sub-command functions in the same way as the
PRM_RD main command. Refer to the drive manual for more information on MEMOBUS/Modbus register
numbers.
PRM_RD Command
Byte
Command
Description
Ofs+0
PRM_RD (01 (Hex.))
Command code
Ofs+1
SUB_CTRL
Refer to page
Ofs+2
Ofs+3
Ofs+4
NO
MEMOBUS/Modbus register number (Lower)
Ofs+5
MEMOBUS/Modbus register number (Upper)
Ofs+6
SIZE
Data size to read [units: byte] 2, 4, 6, and 8 are available.
Ofs+7
Reserved (0)
Not used
Ofs+8
Ofs+9
Ofs+10
・
・
Ofs+31
PRM_RD Response
Byte
Response
Description
Ofs+0
PRM_RD (01 (Hex.))
Command code
Ofs+1
SUB_STAT
Refer to page
Ofs+2
Ofs+3
Ofs+4
NO
The value (Lower) set in the command.
Ofs+5
The value (Upper) set in the command.
Ofs+6
SIZE
The value set in the command.
Ofs+7
Reserved (0)
0 is set.
Ofs+8
PARAMETER
Sets the data read in the byte set in the command.
The option stores the data read for PARAMETER from lower byte (LSB) to upper byte (MSB). 0 is stored when the field is
not used.
0 is stored in PARAMETER when command error occurs.
Ofs+9
Ofs+10
・
・
Ofs+31
◆
PRM_WR: 02 (Hex.) (Write Parameter Command)
The PRM_WR command specifies the parameter number, data size, and parameter data to write a parameter. You
can use the command in communication phases 2 and 3. The CONFIG command must be sent to set up after the
parameters are written. Refer to the drive manual for more information on MEMOBUS/Modbus register numbers.