I-7021/22/24, M-7022/24/28 User Manual, Rev: B2.3
156
M-7022, M-7024, M-7024L, M-7024R, M-7024U
3.3 03 (0x03) Read Output Channels
This function code is used to read the analog output values of a
module.
Request
00
Address
1 Byte 1 ~ 247
01
Function code
1 Byte 0x03
02 ~ 03 Starting channel 2 Bytes 0x0000 ~ 0x0001 for M-7022
0x0000 ~ 0x0003 for M-7024
0x0000 ~ 0x0003 for M-7024L
0x0000 ~ 0x0003 for M-7024R
0x0000 ~ 0x0003 for M-7024U
0x0000 ~ 0x0007 for M-7028
04 ~ 05 Number of
output channels
(N)
2 Bytes 0x0001 ~ 0x0002 for M-7022
0x0001 ~ 0x0004 for M-7024
0x0001 ~ 0x0004 for M-7024L
0x0001 ~ 0x0004 for M-7024R
0x0001 ~ 0x0004 for M-7024U
0x0001 ~ 0x0008 for M-7028
Response
00
Address
1 Byte 1 ~ 247
01
Function code
1 Byte 0x03
02
Byte count
1 Byte N x 2
03 ~
Data of output
channels
N x 2
Bytes
Data in the specified data format
Error Response
00
Address
1 Byte 1 ~ 247
01
Function code
1 Byte 0x83
02
Exception code
1 Byte 02: starting channel out of range
03: (starting c number of
output channels) out of range,
incorrect number of bytes received
Summary of Contents for I-7021
Page 9: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 9 1 2 Terminal Assignment 7021 7021P 7022 ...
Page 10: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 10 7024 7024L 7024R ...
Page 11: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 11 7024U 7028 ...
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