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1141
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
1141
SEVERE FAILURE ALARM
FALS
007
1149
FAILURE POINT DETECTION
FPD
269
1157
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
Summary of Contents for SYSMAC CS1D-CPU**
Page 3: ...iv...
Page 29: ...xxx...
Page 185: ...146 List of Instructions by Function Code Section 2 4...
Page 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Page 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Page 1391: ...1352 ASCII Code Table Appendix A...