EtherCAT to Modbus RTU Gateway
16(0x10) Preset Multiple Registers (Write AOs)
This function code is used to set multiple holding registers that are used to store the configuration
values.
[Request]
Byte
Description
00
Net ID (Station Number)
01
Function Code
02-03
Starting AO Address
Number of 16-bit Registers
04-05
(Channels)
06
Byte Count
07
Register Values
[Response]
Byte
Description
00
Net ID (Station Number)
01
Function Code
02-03
Starting AO Address
Number of 16-bit Registers
04-05
(Channels)
[Error Response]
Byte
Description
00
Net ID (Station Number)
01
Function Code
02
Exception Code
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Size
1 Byte
1 to 247
1 Byte
0x10
Refer to the Modbus address depends on your slave
device for more details.
2 Bytes
Byte 02 = high byte
Byte 03 = low byte
Word Count.
2 Bytes
Byte 04 = high byte
Byte 05 = low byte
1 Byte
n =Points x 2 Bytes
Register Values.
n= 2; Byte 03 = high byte
Byte 04 = low byte
.......
n Bytes
n= m; Byte 03 = high byte
Byte 04 = low byte
.......
Byte m+1 = high byte
Byte m+2 = low byte
Size
1 Byte
1 to 247
1 Byte
0x10
The value is the same as Bytes 02-03 of the
2 Bytes
Request
The value is the same as Bytes 04-05 of the
2 Bytes
Request
Size
1 Byte
1 to 247
1 Byte
0x90
Refer to the Modbus Standard Specifications for
1 Byte
more details.
Value
Value
Value
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