Omron RX2 Series User Manual page 772

12 Troubleshooting
E041 RS485 Communication Error
The inverter displays this error only when timeout occurs because of a malfunction due to noises, loose
connection or disconnection of circuit for RS485 communication (such as Modbus-RTU).
This error function can be enabled and disabled by setting of the communication error selection
[CF-05].
Occurrence
Error occurred after
communication is
started.
E042 RTC Error
The error is generated if the data of RTC incorporated in the operator keypad is returned to the initial
data.
Occurrence
Error occurred at
power-on.
E043 EzSQ Illegal Instruction Error
This error is output when an invalid instruction is detected in operation of a program which is
downloaded to the inverter while the programing function EzSQ is used.
The error is also output if the program is put into action in the condition that the program hasn't been
written.
Occurrence
Error occurred when
the program was
about to put into
action.
E044 EzSQ Nest Count Error
This error is output when the nesting frequency of a subroutine, "for" statement, "next" statement, etc.
on a program exceeds 8 times while the programing function EzSQ is used.
Occurrence
Error occurred when
the program was put
into action.
12 - 18
Estimated cause(s)
• Loose connection
Check the wiring to see whether or not the connection is prop-
erly made.
• Disconnection
The situation may be improved by taking a noise countermea-
Noise is mixed.
sure such as wiring separation.
Estimated cause(s)
Replacement of the battery and setting of the date solve the
issue.
A battery in the operator
runs out.
The error occurs when the power supply is turned ON with a
dead battery.
Estimated cause(s)
There is a possibility of EzSQ program writing error and if
Writing error due to there is a noise source nearby, the situation may be improved
noise by taking a noise countermeasure such as keeping the noise
source away and writing the program.
Program hasn't been EzSQ program needs to be written in the factory default set-
entered. ting condition and after initialization. Write in the program.
Estimated cause(s)
The program has deep nesting of a subroutine, "for" state-
Program structure is too ment, "next" statement, etc., with its nesting frequency
complicated. exceeding 8 times. Improvement of the program structure is
required.
High-function General-purpose Inverter RX2 Series User's Manual
Exemplar measures to be taken
Exemplar measures to be taken
Exemplar measures to be taken
Exemplar measures to be taken