ICP DAS USA ET-2242, User Manual

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ET-2200 Series Ethernet I/O Modules
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6.2.7 15(0x0F) Force Multiple Coils (Write DOs)
This function code is used to set multiple coils status or 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 the Modbus Address Table ( Section
6. Mod us ‘egister
Table ) for ET-2200
series module.
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 02-03 of the
Request
04-05
Number of Output Channels
(Points)
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 1to 247
01 Function Code 1 Byte 0x8F
02 Exception Code 1 Byte
Refer to the Modbus Standard
Specifications for more details.
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