Omron E5AR - MANUAL 2 User Manual page 188

Response
Response codes
Function Error
code code
H'02
H'03
H'86
H'04
H'06
7.7 Operation commands (Communication/Modbus)
Response frame
Slave Function Write start
address mode address Write data
H'06 H'00 H'00
1 1 2
Data name
Client address The value from the command frame appears here.
This is the received function code.
In an error response frame, "H'80" is added to the
received function code to indicate that it is an error
Function code
response.
Example: Received function code = H'06
Beginning Beginning address of write that was received.
address of write
Written data Received operation command data.
This is a check code calculated from the client address
to the data end. For the calculation method, see "7.2
CRC-16
Frames ■ Command frame ● Example of CRC-16 cal-
culation" (P.7-4).
Error name
Variable address error
Variable data error
Operation error
Normal end
Command/response example
Operation command to channel 2 (client address: H'01)
Channel 2 operation command
Address : H'0000
Written data: H'0111 (Stop command to channel 2)
Command: 01 06
00 00
01 06 00 00
Response:
CRC-16
2 2 bytes
Explanation
Function code in error response frame = H'86
Cause
The variable address is not H'0000.
Error in written data.
•
Incorrect command code or related informa-
tion.
The operation state does not permit writing.
•
Write via communication is OFF (disabled).
Note that the command is received regardless
of write via communication ON/OFF.
•
Cannot process.
See explanation of commands in "7.9 Com-
mands and responses (Communication/Mod-
bus)" (P.7-17).
Unit error, unit change, display unit error, non-
volatile memory error
No error
(CRC-16)
01 11
01 11 (CRC-16)
7-15