YASKAWA GA800 Technical Reference page 321

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
ENTER Command Mode on page 948
Table 6.9 Message Example When Writing to Multiple Holding Registers
Byte Command Message
0 Slave address
1 Function code
2
Starting No.
3
4
Data Quantity
5
6 Byte No.
7
First data
Data Quantity
8
9
Next data
10
11
CRC-16
12
Note:
The number of bytes set in the command message set the data quantity × 2 during the command message. The response message uses the
same formula.
■
Reading from More than One Holding Register/Reading the Indicated Register
The drive uses function code 5A (Hex.) to write to more than one register, then it reads the contents of four holding
registers at the same time.
The function for writing to more than one register is the same as the function for function code 10 (Hex.). You can
write to a maximum of 16 holding registers.
The four holding registers to be read from are specified in H5-25 to H5-28 [Function 5A Register x Selection].
Table 6.10 shows example messages when you write to more than one holding register or when you read more than
one command register. Table 6.10
• The drive 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 drive rated current (100% = 8192, 50% = 4096 = 1000H)
– H5-28 = 0049H: U1-10 [Input Terminal Status] = 00H
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
ENTER Command Mode on page 948
Table 6.10 Message Example When Reading from More than One Holding Register/Reading the Indicated Register
Command Message
Byte
0 Slave address
1 Function Code
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
and Enter Command on page 324
Setting Data
Response Message (When
(Hex.)
01
10
Upper 00
Starting No.
Lower 01
Upper 00
Data Quantity
Lower 02
04
CRC-16
Upper 00
Lower 01
Upper 17
Lower 70
Upper 6D
Lower B7
uses this register data for the examples:
and Enter Command on page 324
Response Message (when normal)
Setting Data
(Hex.)
01 Slave address
5A Function Code
6.3 MEMOBUS/Modbus Communications
for more information.
Setting Data
Normal)
(Hex.)
Slave address 01
Function code 10
Upper 00
Lower 01
Upper 00
Lower 02
Upper 10
Lower 08
-
-
-
-
-
for more information.
Setting Data
(Hex.)
01
5A
H5-11: Comm
Setting Data
Response Message (When
There is a Fault)
(Hex.)
Slave address
Function code
Error code
Upper
CRC-16
Lower
-
-
-
-
-
-
-
-
H5-11: Comm
Response Message (when there is a fault)
Setting Data
(Hex.)
Slave address
Function Code
01
90
02
CD
C1
6
01
DA
321