Modbusmappingtable; Functioncode3(0X03)=Readholdingresisters; Functioncode4(0×04)=Readinputresisters - Autonics DPU Series User Manual

9.ModbusMappingTable
9.1 Functioncode3(0X03)=Readholdingresisters
(1)Request
0×01
Add.
(2)Response
0×01
Add.
(3)Error
0×01
Address
※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
0×01
Address
(2)Response
0×01
Address
(3)Error
0×01
Address
※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.
©CopyrightReservedAutonicsCo.,Ltd.
0×03 0×00
Start address
Com-
mand
High
0×03 0×10
Response Number of
command data
0×83 ××
Response Exception
command code
0×04 0×00
Start address
Command
High
0×04 0×10
Response Number
command of data
0×84 ××
Response Exception
command code
0×00 0×00
Number of data
Low High
0×03 0×E8 ...
1st data ...
High Low ...
Slave to Master
×× ××
CRC 16
0×00 0×00
Number of data
Low High
0×03 0×E8 ... 0×03
1st data ... 16th data
High Low ... High
Slave to Master
×× ××
CRC 16
9.ModbusMappingTable
Master to Slave
0×16 ××
CRC 16
Low High
Slave to Master
0×03 0×E8 ××
16th data CRC 16
High Low High
Master to Slave
0×10 ××
CRC 16
Low High
Slave to Master
0×E8 ××
CRC 16
Low High
××
Low
××
Low
××
Low
××
Low
49