Troubleshooting
57
11 Troubleshooting
11-1
Detection of communication errors
This driver has functions to detect abnormalities that may occur in communication, including two types:
communication errors and alarms.
Communication errors
If a communication error of the RS-485 communication error (error code 84h) occurs, the C-DAT/C-ERR LED will be lit
in red and the POWER/ALARM LED will blink in blue. When any other communication error occurs, all LEDs remain off.
The communication error can be checked with the “Communication error history” command or the
MEXE02
.
The communication error history is cleared when the main power supply and control power supply
of the driver is turned off because it is stored in RAM.
z
Communication error list
For RS-485 communication
Refer to the
AZ
Series OPERATING MANUAL Function Edition for details about causes.
Type of communication error
Error
code
Cause
RS-485 communication error
84h
A transmission error was detected.
Command not yet defined
88h
An exception response (exception code 01h, 02h) was
detected.
Execution disable due to user I/F
communication in progress
89h
An exception response (exception code 04h) was detected.
Execution disable due to non-volatile
memory processing in progress
8Ah
Out of setting range
8Ch
An exception response (exception code 03h, 04h) was
detected.
Command execute disable
8Dh
An exception response (exception code 04h) was detected.
For industrial network
Error
code
Type of
communication error
Cause
Remedial action
84h
RS-485 communication
error
One of the following errors was
detected.
Framing error
BCC error
•
Check the connection with the
network converter.
•
Check the setting of RS-485
communication.
88h
Command not yet
defined
A command requested by the host
controller could not be executed
because of being undefined.
•
Check the setting value for the
command.
•
Check the flame configuration.
89h
Execution disable due
to user I/F
communication in
progress
A command requested by the host
controller could not be executed
because the driver and the
MEXE02
was being communicated.
Wait until the
MEXE02
is completed
processing.
8Ah
Execution disable due
to non-volatile memory
processing in progress
A command could not be executed
because the driver was under
processing of the non-volatile memory.
Internal processing was in progress.
(SYS-BSY is ON.)
An alarm of the EEPROM error was
being generated.
•
Wait until the internal processing is
completed.
•
When the EEPROM error occurred,
initialize all parameters using the
MEXE02
or via RS-485
communication.
