FX Series Programmable Controller Diagnostic Devices 6
6-19
Error Detection
Device
Stored Error
Number
Associated Meaning Action
D8067
Operation
error
0000 No error
These error occur durin
the execution of an oper-
ation.
When an operation error
occurs, STOP the PLC
enter pro
rammin
ode
and correct the fault.
Note: operation errors
can occur even when the
s
ntax or circuit desi
n
is correct, e.
.
D500Z is a valid state-
ment within an FX PLC.
But if Z had a value of
100, the data re
ister
D600 would be
attempted to be
accessed. This will
cause an operation error
as there is no D600
device available.
6701
1) No
ump destination for CJ or CALL
instructions
2) A label is desi
nated in a block that
comes after the END instruction
3) An independent label is desi
nated in
a FOR-NEXT loop or a subroutine
6702
6 or more CALL instructions have been
nested to
ether
6703
3 or more interrupts have been nested
to
ether
6704
6 or more FOR - NEXT loops have been
nested to
ether
6705
An incompatible device has been speci-
fied as an operand for an applied instruc-
tion
6706
A device has been specified outside of
the allowable ran
e for an applied instruc-
tion operand
6707
A file re
ister has been accessed which is
outside of the users specified ran
e
6708 FROM/ TO instruction error
6709
Other error, i.e. missin
IRE/ SRET, unau-
thorized FOR - NEXT relationship
D8067
PID
Operation
error
6730 Samplin
time T
S
(T
S
<0 or >32767)
The identified parameter
is specified outside of its
allowable ran
e
Execution ceases PID
instruction must be reset
before execution will
resume
6732 Input filter value
α
(
α
<0 or >=101)
6733 Proportional
ain K
P
(K
P
<0 or >32767)
6734 Inte
ral time constant T
I
(T
I
<0 or >32767)
6735 Derivative
ain K
D
(K
D
<0 or >=101)
6736
Derivative time constant T
D
(T
D
<0 or >32767)
6740
Samplin
time TS is less than the pro-
ram scan time.
TS is set to pro
ram
scan time -
Execution will continue.
6742 Current value
∆
exceeds its limits Data affected resets to
the nearest limit value.
For all errors except
6745, this will either be a
minimum of -32768 or a
maximum of +32767.
Execution will continue.,
but user should reset
PID instruction.
6743 Calculated error
ε
exceeds its limits
6744 Inte
ral result exceeds its limits
6745
Derivative
ain over, or differential value
exceeds allowable ran
e
6746 Derivative result exceeds its limits
6747 Total PID result exceeds its limits
6750
SV - PV
nf
< 150, or s
stem is unstable
(SV - PV
nf
has wide, fast variations)
The error fluctuation is
outside the normal oper-
ation limits for the PID
instruction. Execution
ceases. PID instruction
must be reset.
6751 Lar
e Overshoot of the Set Value
6752
Lar
e fluctuations durin
Autotunin
Set
Process
