Yaskawa SI-ET3 - Manual (Page 27)

9 Main Command
YASKAWA ELECTRIC SIEP C730600 62B 1000-Series Option SI-ET3 Technical Manual 27
Example: Reading C1-01 (200H)
‹ PRM_WR: 02H (Write Parameter Sub-Command)
The PRM_WR command is used to write a parameter by specifying the parameter number, data size, and parameter data.
The command can be used in communication phases 2 and 3. The CONFIG command must be sent to set up after the
parameters are written. Refer to the drive instruction manual for details of MEMOBUS/Modbus register numbers.
PRM_RD Response
Byte Response Description
0 PRM_RD (01H) Command code
1 RWDT Watchdog data
2
CMD_STAT
Refer to Command Status (CMD_STAT) on page 24 .
If the SIZE data is invalid or MEMOBUS/Modbus register number does not exist, “9” is set for CMD_ALM. 3
4
NO
MEMOBUS/Modbus register number (Lower) set in the command.
5 MEMOBUS/Modbus register number (Upper) set in the command.
6 SIZE The SIZE is the same as the register number set in MEMOBUS/Modbus transfers.
7 Reserved (0) 0 is set.
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.
9
10
x
x
31
Byte Command Response
4 00H 00H
5 02H 02H
6 02H 02H
7 00H 00H
8 00H Value set to C1-01 (Lower)
9 00H Value set to C1-01 (Upper)
PRM_WR Command
Byte Command Description
0 PRM_WR (02H) Command code
1 WDT Watchdog data
2
CMD_CTRL Refer to Command Control (CMD_CTRL) on page 24 .
3
4
NO
MEMOBUS/Modbus register number (Lower)
5 MEMOBUS/Modbus register number (Upper)
6 SIZE
Set the data size in byte.
Available setting values are 2, 4, 6, and 8
7 Reserved (0) Not used
8
PARAMETER Specify the lower byte (LSB) before the upper byte (MSB) in the size set in the SIZE.
9
10
x
x
31
PRM_WR Response
Byte Response Description
0 PRM_WR (02H) Command code
1 RWDT Watchdog data