FC6A SERIES MICROS MART USER ’S M ANUAL FC9Y-B17225-355: FUNCTIONS AND SETTINGSCatch InputThe catch input function is used to receive short pulses from sensor outputs regardless of the scan time. Input pulses shorter than one scan timecan be received. When using catch input, the on/off status according to the status of the external inputs during one scan is stored in the specialinternal relays (M8153 to M8157, M8160) that correspond to each external input group, and those signals can be used as input conditions.The Function Area Settings dialog box is used to designate inputs I0, I1, I3, I4, I6 and I7 as a catch input.Normal input signals to input terminals are read when the END instruction is executed at the end of a scan.Since these settings relate to the user program, the user program must be downloaded to the FC6A Series MICROSmart afterchanging any of these settings.Catch Input SpecificationsNote: Input filter settings have no effect on the catch inputs. For the input filter function, see "Input Filter" on page 5-42.External InputsExternal inputs on the FC6A Series MICROSmart can be switched between and used as normal inputs, high-speed counters, catchinputs, interrupt inputs, and frequency measurements. To use catch inputs, specify the corresponding group as Catch Input inthe Function Area Settings of WindLDR.The status of external inputs that are assigned to catch inputs are stored in the following special internal relays by group (read-only).All-in-One CPU module*1 Can be used as a normal input.*2 Read-only.Plus CPU module*1 Can be used as a normal input.*2 Can be used only with the Plus 32-I/O type.*3 Read-only.Programming WindLDR1. From the WindLDR menu bar, select Configuration > Input Configuration.The Function Area Settings dialog box for Input Configuration appears.Minimum Turn ON Pulse Width 5 μsMinimum Turn OFF Pulse Width 5 μsGroup 1 2 3 4 5 6External Input I2 I0 I1 I3 I4 I5 I6 I7Catch Input — *1 Yes Yes Yes Yes — *1 Yes YesSpecial Internal Relay *2 — M8153 M8154 M8155 M8156 — M8157 M8160Group 1 2 3 4 5 6External Input I2 I0 I1 I13*2 I3 I4 I5 I6 I7Catch Input — *1 Yes Yes —*1 Yes Yes —*1 Yes YesSpecial Internal Relay *3 — M8153 M8154 — M8155 M8156 — M8157 M8160Catch Input Rising/FallingEdge SelectionCatch Input Rising EdgeCatch Input Falling Edge
