Mitsubishi Electric MELSEC FX Series - Page 134

7 Applied Instructions
7.1 Program Flow
132
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
Cautions
1) Refer to the following items for the cautions on the interrupt program.
→ Refer to Section 7.1.4.
2) Use the EI instruction as follows when the FX
U, FX2C, FX2N, FX2NC, FX3U and FX3UC PLCs use the pulse
catch function. The IE instruction does not need to be programmed when the FX
0, FX0S, FX0N, FX1S,
FX
1N, FX1NC or FX3G PLC uses the pulse catch function.
For the details of special auxiliary relays and other devices used with the pulse catch function, refer to the
following manual.
→ FX Structured Programming Manual (Device & Common)
When using the FX
3U PLC
*1. A special auxiliary relay for the X000 pulse catch function used in the FX
1S, FX1N, FXU, FX2C, FX2N,
FX
2NC, FX3G, FX3U and FX3UC PLCs. The special auxiliary relay depends on the PLC used and input
number. For the pulse catch function, refer to Chapter 8.
[Structured ladder]
Y000
EI
EN ENO
M8170
*1
X002
[ ST ]
EI(TRUE)
Y000:=M8170;
*1
RST(X001, M8170);
*1
RST
EN ENO
d
M8170
With the rising edge of X000 detected,
M8170 is reset by interrupt.
Resets pulse catch results.