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9.ModbusMappingTable
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9.ModbusMappingTable
9.1 Functioncode3(0X03)=Readholdingresisters
(1)Request
(2)Response
(2)Response
※ Exception code
0×01 : Not supported command code.
0×02 : Starting address of required data and transmittable address are different.
0×03 : The number of required data is over than the number of transmittable data.
0×04 : Transmittable data does not process properly.
9.2 Functioncode4(0×04)=Readinputresisters
(1)Request
※ Exception code
0×01 : Not supported command code.
0×02 : Starting address of required data and transmittable address are different.
0×03 : The number of required data is over than the number of transmittable data.
0×04 : Transmittable data does not process properly.
(3)Error
(3)Error
Master to Slave
Master to Slave
Slave to Master
Slave to Master
Slave to Master
Slave to Master
0×01 0×03 0×00 0×00 0×00 0×16 ×× ××
Add.
Com-
mand
Start address Number of data CRC 16
High Low High Low High Low
0×01 0×03 0×10 0×03 0×E8 ... 0×03 0×E8 ×× ××
Add.
Response
command
Number of
data
1st data ... 16th data CRC 16
High Low ... High Low High Low
0×01 0×83 ×× ×× ××
Address
Response
command
Exception
code
CRC 16
0×01 0×04 0×00 0×00 0×00 0×10 ×× ××
Address Command
Start address Number of data CRC 16
High Low High Low High Low
0×01 0×84 ×× ×× ××
Address
Response
command
Exception
code
CRC 16
0×01 0×04 0×10 0×03 0×E8 ... 0×03 0×E8 ×× ××
Address Response
command
Number
of data
1st data ... 16th data CRC 16
High Low ... High Low High Low