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2-2-29 Failure Diagnosis Instructions
Instruction
Symbol/Operand
Mnemonic
Code
FAILURE ALARM
FAL(006)
FAL
@FAL
006
N: FAL number
S: 1st message
word or error
code to gener-
ate
SEVERE
FALS(007)
FAILURE ALARM
FALS
007
N:
FALS number
S: 1st message
word or error
code to gener-
ate
FAILURE POINT
DETECTION
FPD(269)
FPD
269
C: Control word
T: Monitoring time
R: 1st register
word
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Generates or clears user-defined non-fatal errors. Non-fatal errors
do not stop PC operation.
N
Also generates non-fatal errors with the system.
S
Execution of
FAL(006)
generates a
non-fatal error
with FAL
number N.
Generates user-defined fatal errors. Fatal errors stop PC operation.
Also generates fatal errors with the system.
N
Execution of
S
FALS(007)
generates a
fatal error
with FALS
number N.
Diagnoses a failure in an instruction block by monitoring the time
between execution of FPD(269) and execution of a diagnostic output
and finding which input is preventing an output from being turned ON.
C
Time monitoring function:
T
Starts timing when execution condition A goes
R
ON. Generates a non-fatal error if output B
isn't turned ON within the monitoring time.
Execution
condition A
Next instruction block
Logic diagnosis block*
Logic diagnosis
execution condition C
Logic diagnosis function
Determines which input in C
prevents output B from going ON.
2. Summary of Instructions
Function
FAL Error Flag ON
Corresponding Executed FAL
Number Flag ON
Error code written to A400
Error code and time written to Error
Log Area
ERR Indicator flashes
Message
displayed on
Programming
Console
FALS Error Flag ON
Error code written to A400
Error code and time/date written to
Error Log Area
ERR Indicator lit
Message displayed
on Programming
Console
Error-pro-
T
cessing
R
block (op-
tional)
Diagnostic output B
Location
Page
Execution
condition
Output
999
Required
2
Output
1006
Required
Output
1012
Required
111
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