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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Failure Diagnosis Instructions
2
FAL
Failure Diagnosis Instructions
FA L
Applicable Program Areas
Operands
Generating or Clearing User-defined Non-fatal Errors
Note The value of operand N must be different from the content of A529 (the system-generated FAL/FALS number).
Generating Non-fatal System Errors
Note The value of operand N must be the same as the content of A529 (the system-generated FAL/FALS number).
Operand Specifications
Instruction Mnemonic Variations
Function
code
Function
FAILURE ALARM FAL @FAL 006
Generates or clears user-defined non-fatal errors.
Non-fatal errors do not stop PLC operation.
Symbol
FAL
Generating or Clearing User-defined Non-fatal Errors Generating Non-fatal System Errors
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
N FAL number Constants only 1
S
First message word or constant / First word containing the error
code and error details
WORD Variable
Generates a non-fatal error Clears all non-fatal errors
N 1 to 511 (These FAL numbers are shared with FALS numbers.) 0
S
Word address:
Generates a non-fatal error with the corresponding FAL number.
The 16-character ASCII message contained in S through S+7 will
be displayed on the Programming Device.
#0000 to #FFFF:
Generates a non-fatal error with the corresponding FAL number (no
message).
#FFFF: Clears all non-fatal errors.
#0001 to #01FF: Clears the non-fatal error with the corresponding
FAL number.
Other: Clears the most serious non-fatal error.
Generates a non-fatal error
N 1 to 511 (These FAL numbers are shared with FALS numbers.)
S Error code that will be generated. (See Function below.)
S+1 Error details code that will be generated. (See Function below.)
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
N --- --- --- --- --- --- --- --- ---
OK --- --- ---
S OKOKOKOKOKOKOK OK OK
N: FAL number
S: First message word or
constant
(
0000 to FFFF
)
FAL(006)
N
S
N: FAL number (value in A529)
S: First word containing the
error code and error details
FAL(006)
N
S