Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 272 / 478

7 Using Modbus-RTU Slave Mode
7-22
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
z
Response
z
Writing 3AC5 and 9713 Hex to 2 Words, DM1000 and DM1001
Length Data
Function Code 1 byte 10 hex
Starting Address 2 bytes 0000 to 17FF hex
Quantity of Regis-
ters 2 bytes 0001 to 007B hex
Request Response
Data Data
Function Code 10 hex Function Code 10 hex
Starting Address (H) 03 hex Starting Address (H) 03 hex
Starting Address (L) E8 hex Starting Address (L) E8 hex
Quantity of Registers (H) 00 hex Quantity of Registers (H) 00 hex
Quantity of Registers (L) 02 hex Quantity of Registers (L) 02 hex
Byte Count 04 hex
Registers Value (H) 3A hex
Registers Value (L) C5 hex
Registers Value (H) 97 hex
Registers Value (L) 13 hex
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DM1000 3 A C 5
DM1001 9 7 1 3
Error Format
Length Data
Function Code 1 byte Function code + 80 hex
Exception Code 1 byte Error code
Error
code
Name Description
01 Illegal function • There is an error in the specified function code.
• A function code not supported by the Serial Com-
munications Unit was specified.
02 Illegal data address • There is an error in the specified starting address.
• The combination of the specified starting address
and data length (quantity of registers/coils)
exceeds the valid range.
• The specified data length (quantity of regis-
ters/coils) exceeds the valid range.
• The specified data length (quantity of regis-
ters/coils) differs from the actual data length.
• Less than 4 bytes of data was received.
03 Illegal data value • There is an error in the specified data. (The data
for the Write Single Coil Command is not 0000 hex
or FF00 hex.)
04 Slave device failure • Reading or writing could not be performed
because an error occurred in the CPU Unit.