ICP DAS USA ET-2217CI, Руководство пользователя

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ET-2200 Series Ethernet I/O Modules
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6.2.7 15(0x0F) Force Multiple Coils (Write DO values)
This function code is used to set the status of multiple coils or to write multiple Digital Output
values for 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 0x0F
02-03 Starting DO 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 Output Channels
(Points)
2 Bytes Byte 04 = high byte ; Byte 05 = low byte
06 Byte count 1 Byte n = (7)/8
07 Output value n Bytes
A bit corresponds to a channel. A value of 1
for a bit denotes that the channel is ON,
while a value of denotes that the channel is
OFF.
n= 1; Byte 07 = data bit 7 to 0
n= 2; Byte 08 = data bit 15 to 8
.......
n= m; Byte m+6 = data bit (8m-1) to 8 (m-1)
[Response]
Byte Description Size Value
00 Net ID (Station Number) 1 Byte 1 to 247
01 Function Code 1 Byte 0x0F
02-03 Starting DO Address 2 Bytes
The value is the same as Bytes 02-05 of the
Request
04-05
Number of Output Channels
(Points)
2 Bytes
[Error Response]
Byte Description Size Value
00 Net ID (Station Number) 1 Byte 1to 247
01 Function Code 1 Byte 0x8F
02 Exception Code 1 Byte
Refer to the Modbus Standard Specifications
for more details.