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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
g
the execution of an oper-
ation.
When an operation error
occurs, STOP the PLC
enter pro
g
rammin
g
ode
and correct the fault.
Note: operation errors
can occur even when the
s
y
ntax or circuit desi
g
n
is correct, e.
g
.
D500Z is a valid state-
ment within an FX PLC.
But if Z had a value of
100, the data re
g
ister
D600 would be
attempted to be
accessed. This will
cause an operation error
as there is no D600
device available.
6701
1) No
j
ump destination for CJ or CALL
instructions
2) A label is desi
g
nated in a block that
comes after the END instruction
3) An independent label is desi
g
nated in
a FOR-NEXT loop or a subroutine
6702
6 or more CALL instructions have been
nested to
g
ether
6703
3 or more interrupts have been nested
to
g
ether
6704
6 or more FOR - NEXT loops have been
nested to
g
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
g
e for an applied instruc-
tion operand
6707
A file re
g
ister has been accessed which is
outside of the users specified ran
g
e
6708 FROM/ TO instruction error
6709
Other error, i.e. missin
g
IRE/ SRET, unau-
thorized FOR - NEXT relationship
D8067
PID
Operation
error
6730 Samplin
g
time T
S
(T
S
<0 or >32767)
The identified parameter
is specified outside of its
allowable ran
g
e
Execution ceases PID
instruction must be reset
before execution will
resume
6732 Input filter value
α
(
α
<0 or >=101)
6733 Proportional
g
ain K
P
(K
P
<0 or >32767)
6734 Inte
g
ral time constant T
I
(T
I
<0 or >32767)
6735 Derivative
g
ain K
D
(K
D
<0 or >=101)
6736
Derivative time constant T
D
(T
D
<0 or >32767)
6740
Samplin
g
time TS is less than the pro-
g
ram scan time.
TS is set to pro
g
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
g
ral result exceeds its limits
6745
Derivative
g
ain over, or differential value
exceeds allowable ran
g
e
6746 Derivative result exceeds its limits
6747 Total PID result exceeds its limits
6750
SV - PV
nf
< 150, or s
y
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
g
e Overshoot of the Set Value
6752
Lar
g
e fluctuations durin
g
Autotunin
g
Set
Process