Omron Q2A Series Technical Manual page 223

You must give the holding register number from which to read separately.
The following table shows example messages when you read the frequency reference and torque limit from the
drive for slave 1. These specified holding registers data are used for the examples.
• 0024H:U1-01 [Frequency Reference] = 60.00 Hz (6000 = 1770H)
• 0028H:U1-09 [Torque Reference] = 100.0% (1000 = 03E8H)
Table 6.7 Message Example When Reading the Contents of Non-Consecutive Holding Registers
Command Message
Byte
0 Slave address
1 Function code
2
Subfunction
code
3
4
Data Qty
5
6
Holding register
1 No.
7
8
Holding register
2 No.
9
10
CRC-16
11
Note:
The number of bytes set within the response message sets twice the number of data contained in the command message. The response
message uses the same formula.
■
Writing to Non-Consecutive Holding Registers
You can separately write the specified data to a maximum of 60 holding registers that uses function code 67
(Hex.) and subfunction code 010E (Hex.) .
You must give the holding register number from which to write separately.
The following table shows example messages when you write the frequency reference and torque limit from the
drive for slave 1. These specified holding registers data are used 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 [Mbus ENTER Command
Mode] setting, you must use the Enter command to save and enable the contents of the changes. Refer to
Mbus ENTER Command Mode on page 728
Table 6.8 Message Example When Writing to Non-Consecutive Holding Registers
Command Message
Byte
0 Slave address
1 Function code
2 Upper
Subfunction
code
3 Lower
4 Upper
Data Qty
5 Lower
6 Upper
Byte No.
7 Lower
8 Upper
Holding register
1 No.
9 Lower
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Setting Data
(when Normal)
(Hex.)
01
67
Upper 01
Subfunction
code
Lower 0D
Upper 00
Byte No.
Lower 02
Upper 00
Holding register
1 data
Lower 24
Upper 00
Holding register
2 data
Lower 28
Upper 8B
CRC-16
Lower 29
and Enter Command on page 224
Setting Data
(when Normal)
(Hex.)
01 Slave address
67 Function code
01
Subfunction
code
0E
00
Data Qty
02
00
CRC-16
04
00
02
Response Message
Setting Data
(Hex.)
Slave address 01
Function code 67
Upper 01
Lower 0D
Upper 00
Lower 04
Upper 17
Lower 70
Upper 03
Lower E8
Upper 47
Lower ED
Response Message
Setting Data
(Hex.)
01
67
Upper 01
Lower 0E
Upper 00
Lower 02
Upper D5
Lower FC
-
-
6.2 Modbus Communications
Response Message
Setting Data
(when There is a Fault)
Slave address
Function code
Error code
Upper
CRC-16
Lower
-
-
-
-
-
-
-
for more information.
Response Message
Setting Data
(when There is a Fault)
Slave address
Function code
Error code
Upper
CRC-16
Lower
-
-
-
-
-
(Hex.)
01
E7
02
EA
31
H5-11
6
(Hex.)
01
E7
02
EA
31
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