When an error message is displayed (Error code list)
Maintenance/Troubleshooting
1-119
3601 There are no instructions on branch.
Confirm the logic.
There is a branch with no instructions. If this is
set on purpose, it presents no problem. If there is
no specific purpose, it is recommended to delete
the branch.
3650
∗∗∗
There is no program descrip-
tion.(
∗∗∗
indicates an operand
name.)
There is an empty subroutine program. This does
not affect the operation; however, it is recom-
mended to delete the program if there is no spe-
cific purpose.
3651
∗∗∗
Subroutine is not used.
(
∗∗∗
indicates a subroutine name.)
There is a subroutine program which is not
called. This does not affect the operation; how-
ever, it is recommended to delete the subroutine
program if there is no specific purpose.
3652 Labels are defined consecutively with
nothing in between them.
There are labels defined consecutively with
nothing in between. This does not affect the
operation; however, it is recommended to delete
the labels if they are unnecessary.
3700 Rung has only one Coil instruction.
This instruction will always run.
Only one coil instruction exists in the rung. This
does not affect the operation; however, note that
this coil will always turn on.
3900
∗∗∗
Variable is used in multiple Coil
instructions.
(
∗∗∗
indicates a symbol variable.)
One variable is used in two or more coil instruc-
tions (double coil). If this is set on purpose, it
presents no problem. Under normal conditions,
one variable is used in one coil instruction
(except for SET/RESET instructions).
3901
∗∗∗
Variable is used in multiple Timer
instructions.
(
∗∗∗
indicates a symbol variable.)
One timer variable is used in multiple timer
instructions. Since this may cause malfunctions,
define one timer variable for one timer instruc-
tion.
3902
∗∗∗
Variable is used in multiple
Counter instructions.
(
∗∗∗
indicates a symbol variable.)
One counter variable is used in multiple counter
instructions. Define one counter variable for one
counter instruction.
3903 Operand S1 is out of range. Define a
valid value.
The constant of operand S1 is out of range. Set a
positive constant value.
3904 Operand S2 value is zero.
When operand S2 is an integer constant and its
value is zero, operand S2 is set to zero.
3905 Operand S1 and operand S2 are
integer constants.
Both operands S1 and S2 are set to constants. Set
either of operand S1 or S2 to a value other than a
constant.
3906 PT value is zero.
The value of PT is zero. This presents no prob-
lem when the value of PT is specified separately.
3907 PV value is zero.
The value of PV is zero. This presents no prob-
lem when the value of PV is specified separately.
Error
No.
Error Message
Cause and Solution
