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Chapter 6 Communication Mode
(3) Example
Read the status of Y110-Y123 (14 points) in the slave 03.
Y115
OFF
OFF
ON
OFF
ON
C
B
Y131
OFF
OFF
ON
OFF
OFF
Query
Field name
Slave address
Function code
Coil head address (upper)
Coil head address (lower)
Number of coils (upper)
Number of coils (lower)
Error check
Data in Y110 – Y117 is stored in high byte (LSB = Y110), and data in Y118 –Y123 is stored in low byte.
Y110
ON
OFF OFF OFF
ON
OFF OFF
Y123
ON
OFF
ON
OFF
OFF
ON
0
Example
(HEX)
0 3
0 1
0 1
0 A
0 0
0 E
[CRC]
6 - 64
Y100
ON ON ON
OFF
Y116
OFF
ON
OFF
ON
ON
A
Response
Field name
Slave address
Function code
Number of data bytes
Coil data (upper)
Coil data (lower)
Error check
Example
(HEX)
0 3
0 1
0 2
C B
0 A
[CRC]
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