10.6 MEMOBUS/Modbus Communications
746 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Table 10.26 shows example messages when you write to more than one holding register or when you read more than
one command register. Table 10.26 uses this register data for the examples:
• The bypass for slave 1 is set for Forward run with a frequency reference of 60.00 Hz.
• The setting in H5-25 to H5-28 and the data in the specified holding registers are as follows.
– H5-25 = 0044H: U1-05 [Motor Speed] = 60.00 Hz (6000 = 1770H)
– H5-26 = 0045H: U1-06 [Output Voltage Ref] = 200.0 V (2000 = 07D0H)
– H5-27 = 0042H: U1-03 [Output Current] = 50% of rated current (100% = 8192, 50% = 4096 = 1000H)
– H5-28 = 0049H: U1-10 [Input Terminal Status] = 00H
If parameter values are changed using the Write command, an Enter command is necessary to activate and save the
data. Refer to H5-11: Comm ENTER Command Mode on page 309 and Enter Command on page 748 for more
information.
Table 10.26 Message Example When Reading from More than One Holding Register/Reading the Indicated Register
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 5A Function Code
5A
Function Code DA
2
Starting No.
Upper 00 Register status 0F Register status 0F
3 Lower 01
Data in holding
register 1
selected with H5-
25
Upper 17
Data in holding
register 1
selected with H5-
25
Upper 17
4
Data Qty
Upper 00 Lower 70 Lower 70
5 Lower 02
Data in holding
register 2
selected with H5-
26
Upper 07
Data in holding
register 2
selected with H5-
26
Upper 07
6 Byte No. 04 Lower D0 Lower D0
7
First data
Upper 00
Data in holding
register 3
selected with H5-
27
Upper 10
Data in holding
register 3
selected with H5-
27
Upper 10
8 Lower 01 Lower 00 Lower 00
9
Next data
Upper 17
Data in holding
register 4
selected with H5-
28
Upper 00
Data in holding
register 4
selected with H5-
28
Upper 00
10 Lower 70 Lower 00 Lower 00
11
CRC-16
Upper 4F
Starting No.
Upper 00 Error Codes 02
12 Lower 43 Lower 01
CRC-16
Upper E9
13 -
Data Qty
Upper 00 Lower 6C
14 - Lower 02 -
15 -
CRC-16
Upper AC -
16 - Lower D0
-