YASKAWA GA800

Network Communications
6
6.3 MEMOBUS/Modbus Communications
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 323
Table 6.11 Message Example When Reading the Contents of Non-Consecutive Holding Registers
Byte
Command Message Response Message (when normal) Response Message (when there is a fault)
Setting Data
(Hex.)
Setting Data
(Hex.)
Setting Data
(Hex.)
0 Slave address 01 Slave address 01 Slave address 01
1 Function Code 67 Function Code 67 Function Code E7
2
Subfunction
Code
Upper 01
Subfunction
Code
Upper 01 Error Codes 02
3 Lower 0D Lower 0D
CRC-16
Upper EA
4
Data Qty
Upper 00
Byte No.
Upper 00 Lower 31
5 Lower 02 Lower 04 -
6
Holding register
1 No.
Upper 00
Holding register
1 data
Upper 17 -
7 Lower 24 Lower 70 -
8
Holding register
2 No.
Upper 00
Holding register
2 data
Upper 03 -
9 Lower 28 Lower E8 -
10
CRC-16
Upper 8B
CRC-16
Upper 47 -
11 Lower 29 Lower ED -
Note:
The number of bytes set within the response message sets twice the number of data contained in the command message.
■ Writing to Non-Consecutive Holding Registers
The drive uses function code 67 (Hex.) and subfunction code 010E (Hex.) to read data with a maximum of 60 holding
registers.
You must give the holding register number from which to write separately.
Table 6.12 shows example messages when you write the frequency reference and torque limit from the drive for slave
1. Table 6.12 uses these specified holding registers data for the examples.
• 0002H: Frequency Reference = 60.00 Hz (6000 = 1770H)
• 0004H: Torque Limit = 150.0% (1500 = 05DCH)
When you rewrite the parameter value with the write command through the H5-11 [Comm ENTER Command Mode]
setting, you must use the Enter command to save and enable the contents of the changes. Refer to H5-11: Comm
ENTER Command Mode on page 948 and Enter Command on page 324 for more information.
Table 6.12 Message Example When Writing to Non-Consecutive Holding Registers
Byte
Command Message Response Message (when normal) Response Message (when there is a fault)
Setting Data
(Hex.)
Setting Data
(Hex.)
Setting Data
(Hex.)
0 Slave address 01 Slave address 01 Slave address 01
1 Function Code 67 Function Code 67 Function Code E7
2
Subfunction
Code
Upper 01
Subfunction
Code
Upper 01 Error Codes 02
3 Lower 0E Lower 0E
CRC-16
Upper EA
4
Data Qty
Upper 00
Data Qty
Upper 00 Lower 31
5 Lower 02 Lower 02 -
6
Byte No.
Upper 00
CRC-16
Upper D5 -
7 Lower 04 Lower FC -
8
Holding register
1 No.
Upper 00 - -
9 Lower 02 - -