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External control
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■Control commands
■Support commands
An instruction for the controller is called a “command,” while the message sent back from the controller is a
“response.” The commands below marked by ○ are supported.
If an unsupported command is received by the controller it returns an error response including a “NOT
supported error” code.
■Error codes
Binary hexadecimal 00-FF (ASCII-encoded)
・Description of generated errors
Name Character ASCII Descriptions
Header < 3CH Beginning of the message
Command # 23H Command message
Response
(Normal)
$ 24H Normal response message
Response
(Error)
! 21H Error response message
Terminator C
R
0DH End of the message
No. Command name Code Description
Support
1 Data area read RD Reading from data area
○
2 Data area write WD Writing to data area ○
Error code Error name Descriptions and troubleshooting
40H BCC error
The command data caused a BCC error.
<Troubleshooting> Check the BCC code and resend the data.
41H Format error
For example, the transmission format of the command data is not
correct, or the address does not exist.
<Troubleshooting> Correct the format or command.
42H NOT supported error
The sent address was outside the range.
<Troubleshooting> Check the address.
45H Address error
The sent address was outside the range.
<Troubleshooting> Check the address.