Failure Point Detection - Fpd - Omron CQM1H - PROGRAM Programming Manual

Special Instructions
Example
00000
DM 0000
DM 0001
DM 0002
DM 0003
DM 0004
DM 0005
DM 0006
DM 0007
5-28-7 FAILURE POINT DETECTION – FPD(––)
Limitations
Description
When IR 00000 is ON in the following example, the frame checksum (0008) is
calculated for the 8 words from DM 0000 to DM 0007 and the ASCII equiva-
lent (30 30 30 38) is written to DM 0010 and DM 0011.
@FCS(−−)
#0008
DM 0000
DM 0010
FCS
0001
calculation
0002
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0003
0004
0005
0006
0007
DM 0010
0008
Ladder Symbols
FPD(−−)
C
T
D
D and D+8 must be in the same data area when bit 15 of C is ON.
DM 6144 to DM 6655 cannot be used for T or D.
C must be input as a constant.
FPD(––) can be used in the program as many times as desired, but each
must use a different D. It is used to monitor the time between the execution of
FPD(––) and the execution of a diagnostic output. If the time exceeds T, an
FAL(06) non-fatal error will be generated with the FAL number specified in C.
Address Instruction
00000 LD
00001 @FCS(−−)
0 0 0
3 0 3 0 DM 0011 3 0 3 8
Operand Data Areas
T: Monitoring time (BCD)
IR, SR, AR, DM, EM, HR, TIM/CNT. LR, #
IR, SR, AR, DM, EM, HR, LR
Section 5-28
Operands
00000
# 0008
DM 0000
DM 0010
8
ASCII code
conversion
C: Control data
#
D: First register word
387