1140
Failure Diagnosis Instructions Section 3-30
3-30 Failure Diagnosis Instructions
This section describes instructions used to define and handle errors.
3-30-1 FAILURE ALARM: FAL(006)
Purpose Generates or clears user-defined non-fatal errors. Non-fatal errors do not stop
PLC operation.
With CS1-H, CJ1-H, and CJ1M CPU Units, FAL(006) can also be used to
generate non-fatal system errors.
Ladder Symbol • Generating or Clearing User-defined Non-fatal Errors
• Generating Non-fatal System Errors (CS1-H, CJ1-H, CJ1M, or CS1D
Only)
Variations
Applicable Program Areas
Operands The function of the operands when FAL(006) is used to generate/clear user
defined errors is slightly different from the function when FAL(006) is used to
generate system errors (CS1-H, CJ1-H, CJ1M, and CS1D CPU Units only).
Instruction Mnemonic Function code Page
FAILURE ALARM FAL 006 1140
SEVERE FAILURE ALARM FALS 007 1148
FAILURE POINT DETECTION FPD 269 1156
N
S
FAL(006)
N: FAL number
S: First message word or
constant (0000 to FFFF)
N
S
FAL(006)
N: FAL number (value in A529)
S: First word containing the
error code and error details
Variations Executed Each Cycle for ON Condition FAL(006)
Executed Once for Upward Differentiation @FAL(006)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
To Next Page
Loading...
Need help?
General
