7- Troubleshooting - Omron MX2 Series User Manual

Drive Programming
7- Drive Programming specific trips and Troubleshooting
The table below shows how to handle the specific errors to Drive Programming function. For details on
other errors in the inverter, refer to the inverter instruction manual.
Factor Error (causing
code inverter trip)
E43 Invalid instruction
E44 Nesting count error
E45 Instruction error 1
E50 User trip 0 to 9
to
E59
Possible cause
The PRG terminal was
turned on without a
program downloaded to
the inverter.
Subroutines are nested in
more than eight layers.
For-Next loop statements
are nested in more than
eight layers.
If statements are nested in
more than eight layers.
The jump destination of a
GoTo instruction is a next
instruction to end a for or
other loop.
The variable "U(ii)"
referenced via another
variable is not found.
An arithmetic instruction
caused:
-Overflow,
-underflow, or
-division by zero
A ChgParam instruction
caused:
- reference to a non
existing parameter.
-writing of a value out of
the setting range
-change of a parameter
value (during inverter
operation) that cannot be
updated during inverter
operation, or
Change of a parameter
value of which updating is
restricted by software lock
(when software lock is
enabled).
These trips are generated
from the user application.
The cause is determined
by the Drive Programming
logic
Checking method
By uploading the program,
you can check if really a
program is in the inverter or
not.
Read the program to check
the number of nesting layers
(some times difficult to
recognize)...
Check whether each GoTo
instruction jumps to an
instruction that ends a loop.
Check the numerical value
specified in "U(ii)".
Check the program for the
instruction causing overflow,
underflow, or division by
zero (not in early MX2
firmware).
-Check the parameters and
the values to be written.
-If the error has occurred
during inverter operation,
check whether the
parameter in question can
be updated during inverter
operation.
-Check the setting of
software lock selection
(b031).
Check with the drive
program documentation to
recognize the trip conditions
78
Corrective action
Recreate the program,
and then download it to
the inverter
Correct the program so
that the number of
layers will be eight or
less.
Correct the jump
destinations of GoTo
instructions. As general
recommendation, never
jump a Goto out of the
current level it is.
Correct the value of
variable "U(ii)" or limit
the range of values of
variable "U(ii)".
Correct the program so
that no arithmetic
instruction causes
overflow, underflow, or
division by zero.
-Correct the parameters
or the values to be
written to parameters so
that they will be within
the setting range.
-Disable software lock.
-If the parameter to be
updated is the one that
cannot be updated
during inverter
operation, change the
setting of software lock
selection (b031) to "10"
to switch to the mode
enabling parameter
updating during inverter
operation.
Check the drive
program documentation
to recognize
countermeasures