Catch Input - IDEC MICROSmart FC6A Series User Manual

Catch Input

The catch input function is used to receive short pulses from sensor outputs regardless of the scan time. Input pulses shorter than one scan time
can 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 special
internal 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 after
changing any of these settings.
Catch Input Specifications
Minimum Turn ON Pulse Width
Minimum Turn OFF Pulse Width
Note: Input filter settings have no effect on the catch inputs. For the input filter function, see "Input Filter" on page 5-42.
External Inputs
External inputs on the FC6A Series MICROSmart can be switched between and used as normal inputs, high-speed counters, catch
inputs, interrupt inputs, and frequency measurements. To use catch inputs, specify the corresponding group as Catch Input in
the 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
Group
External Input
Catch Input
*2
Special Internal Relay
*1 Can be used as a normal input.
*2 Read-only.
Plus CPU module
Group
External Input
Catch Input
*3
Special Internal Relay
*1 Can be used as a normal input.
*2 Can be used only with the Plus 32-I/O type.
*3 Read-only.
Programming WindLDR
From the WindLDR menu bar, select Configuration > Input Configuration.
1.
The Function Area Settings dialog box for Input Configuration appears.
5 µs
5 µs
1
I2 I0
*1
— Yes
— M8153 M8154
1 2
I2 I0 I1
*1
— Yes Yes
— M8153 M8154
FC6A S MICROS
ERIES
2 3
I1 I3 I4
Yes Yes Yes
M8155 M8156
3
*2
I13 I3
*1
— Yes
— M8155
U ' M FC9Y-B1722
MART SER S ANUAL
5: F
UNCTIONS AND
4 5
I5 I6
*1
— Yes
— M8157
4 5
I4 I5
*1
Yes —
M8156 — M8157
Catch Input Rising/Falling
Edge Selection
Catch Input Rising Edge
Catch Input Falling Edge
S
ETTINGS
6
I7
Yes
M8160
6
I6 I7
Yes Yes
M8160
5-35