1031
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Failure Diagnosis Instructions
3
FPD
FPD
Applicable Program Areas
Operands
C: Control Word
T: Monitoring Time
T must be between 0 and 9,999 decimal (between 0000 and 270F hex). A value of 0 disables time
monitoring; values in the range of 1 to 270F set the monitoring time from 0.1 to 999.9 seconds.
R: First Register Word
The functions of the register words are described on page 1032.
z Operand Specifications
Instruction Mnemonic Variations
Function
code
Function
FAILURE POINT DETECTION FPD --- 269
Diagnoses a failure in an instruction block by mon-
itoring 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.
Symbol
FPD
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or
transition programs
Usage Not allowed Not allowed OK OK Not allowed Not allowed
Operand Description Data type Size
C Control word --- 1
T Monitoring time --- 1
R First register word --- Variable
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers Flags
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
TK CF
C --- --- --- --- --- --- --- --- --- ---
OK
--- ---
---
--- --- --- ---T
OK OK OK OK OK OK OK OK OK OK OK
R ---
C: Control word
T: Monitoring time
R: First register word
FPD(269)
C
T
R
15 01112
C
FAL number (error detection output selection):
000 to 1FF
Diagnostic output mode
0: Bit address output only (hexadecimal)
8: Bit address and message output (ASCII)
(Including message display for the time monitoring function)
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