IDEC FT1A Series User Manual page 121

Select Catch Input in the Groups 1 through 4 pull-down list boxes. The Catch Input dialog box appears.
2.
Select Catch Input Rising Edge or Catch Input Falling Edge in the pull-down list.
3.
Catching Rising Edge of Input Pulse
Actual Input
ON
OFF
Catch Input Relay
ON
(M8090-M8095)
OFF
Catching Falling Edge of Input Pulse
Actual Input
ON
OFF
Catch Input Relay
ON
(M8090-M8095)
OFF
END
Processed
Note: When two or more pulses enter within one scan, subsequent pulses are ignored.
Example: Maintaining Catch Input
When a catch input is received, the catch input relay assigned to a catch input is turned on for only one scan. This example
demonstrates a program to maintain a catch input status for more than one scan.
M8091 M1 M0
M0
M0
1 scan time
END
Processed
1 scan time
Input I2 is designated as a catch input using the Function Area Settings.
When input I2 is turned on, special internal relay M8091 is turned on, and M0 is maintained in the self-
holding circuit.
When NC input M1 is turned off, the self-holding circuit is unlatched, and M0 is turned off.
M0 is used as an input condition for the subsequent program instructions.
S AXIS P
MART
/L U ' M FT9Y-B1378
RO ITE SER S ANUAL
5: S F
PECIAL UNCTIONS
Note
Note
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