Yaskawa SI-ET3 - Manual (Page 26)

26 YASKAWA ELECTRIC SIEP C730600 62B 1000-Series Option SI-ET3 Technical Manual
9 Main Command
9 Main Command
‹ NOP: 00H (No Operation Command)
The NOP command is used for network control. The current state is returned as a response. The command can be used in
all communication phases.
‹ PRM_RD: 01H (Read Parameter Command)
The PRM_RD command is used to read a parameter by specifying the parameter number and the data size.
The command can be used in communication phases 2 and 3. Refer to the drive instruction manual for details of
MEMOBUS/Modbus register numbers.
NOP command
Byte Command Description
0 NOP (00H) Command code
1 WDT Watchdog data
2
CMD_CTRL Refer to Command Control (CMD_CTRL) on page 24 .
3
4
Reserved (0) Not used
5
x
x
31
NOP Response
Byte Response Description
0 NOP (00H) Command code
1 RWDT Watchdog data
2
CMD_STAT Refer to Command Status (CMD_STAT) on page 24 .
3
4
Reserved (0) Not used
5
x
x
31
PRM_RD command
Byte Command Description
0 PRM_RD (01H) 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
Data size to read [units: byte]
Available setting values are 2, 4, 6, and 8.
7 Reserved (0)
Not used
8
Reserved (0)
9
10
x
x
31