ICP DAS USA ET-2217CI, User Manual

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ET-2200 Series Ethernet I/O Modules
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6.2.8 16(0x10) Set Multiple Registers (Write AO values)
This function code is used to set multiple holding registers that are used to store the configuration
valuesfor the ET-2200 series module.
[Request]
Byte Description Size Value
00 Net ID (Station Number) 1 Byte 1 to 247
01 Function Code 1 Byte 0x10
02-03 Starting AO Address 2 Bytes
Refer to Section 6.3 or 6.4 “Modbus Register
Table” to find the address.
Byte 02 = high byte ; Byte 03 = low byte
04-05
Number of 16-bit Registers
(Channels)
2 Bytes
Word Count.
Byte 04 = high byte ; Byte 05 = low byte
06 Byte Count 1 Byte n =Points x 2 Bytes
07 Register Values n Bytes
Register Values.
n= 2; Byte 03 = high byte
Byte 04 = low byte
.......
n= m; Byte m+1 = high byte
Byte m+2 = low byte
[Response]
Byte Description Size Value
00 Net ID (Station Number) 1 Byte 1 to 247
01 Function Code 1 Byte 0x10
02-03 Starting AO Address 2 Bytes
The value is the same as Bytes 02-03 of the
Request
04-05
Number of 16-bit Registers
(Channels)
2 Bytes
The value is the same as Bytes 04-05 of the
Request
[Error Response]
Byte Description Size Value
00 Net ID (Station Number) 1 Byte 1 to 247
01 Function Code 1 Byte 0x90
02 Exception Code 1 Byte
Refer to the Modbus Standard Specifications
for more details.