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4 Modbus Communications Procedure
E5C-T Digital Temperature Controllers Programmable Type Communications Manual (H186)
4-4 Detailed Description of the Services
4
4-4-3 Variable Write, Single/Operation Command
(2) Command Code and Related Information
This information is the same as that for CompoWay/F. Refer to page 2-16.
(3) Response Code
• Normal Completion
• Error Occurred
Note: For details on variable writing, refer to 4-4-2 Variable Write, Multiple. For details on AT,
refer to the E5
@
C-T Digital Temperature Controllers User's Manual Basic Type (Cat. No.
H185).
(4) Example Command and Response
The following example shows the command/response for a RESET command. (In this case,
the slave address is H'01.)
RESET command (command code: 01; related information: 01)
• Address: H'0000 (fixed)
Write data: H'0101 (RUN/RESET, RESET command)
(5) Operation Commands and Precautions
This information is the same as that for CompoWay/F. Refer to page 2-18.
Function code Error code Name Description
H
'06
--- Normal
completion
No errors were found.
Function code
Error
code
Name Description
H'86 H'02
Variable
address error
The write variable address is incorrect.
H'03
Variable data
error
The write data is incorrect.
• The write data is out of the setting range.
• Command code or related information are
incorrect.
H
'04
Operation
error
The Controller cannot write the data in its
present operating status.
• The Communications Writing parameter is set
to “OFF” (disabled). The command is received
regardless of the Communications Writing
parameter setting (ON/OFF).
• Attempted to write to a parameter in setup
area 1 from setup area 0.
• Attempted to write to a protect parameter from
other than the protect level.
• AT execution is in progress.
• The command cannot be processed. For
details, refer to (5) Operation Commands and
Precautions following this table.
01 06 00 00
01 06 00 00 01 01
01 01 49 9A(CRC-16)
49 9A(CRC-16)
Command:
Response:
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