5: S
PECIAL
F
UNCTIONS
5-32
FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y-B1268
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. Four inputs I2 through I5 can be designated to catch a rising or falling edge of
short input pulses, and the catch input statuses are stored to special internal relays M8154 through M8157, respectively.
The Function Area Settings dialog box is used to designate inputs I2 through I5 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 MicroSmart after changing
any of these settings.
Catch Input Specifications
Minimum Turn ON Pulse Width
All-in-one type: 40 µs
Slim type: 5 µs (I3, I4), 40 µs (I2, I5)
Minimum Turn OFF Pulse Width
All-in-one type: 150 µs
Slim type: 5 µs (I3, I4), 150 µs (I2, I5)
Note:
Input filter settings have no effect on the catch inputs. For the input filter function, see page 5-42.
Catch Input Terminals and Special Internal Relays for Catch Inputs
Group
Catch Input No.
Special Internal Relay for Catch Input
Group 1
I2
M8154
Group 2
I3
M8155
Group 3
I4
M8156
Group 4
I5
M8157
Note:
For wiring the catch input signals, use
a twisted-pair shielded cable.
Programming WindLDR
1.
From the WindLDR menu bar, select
Configuration
>
Input Configuration
.
The Function Area Settings dialog box for Input Configuration appears.
Catch Input Rising/Falling
Edge Selection
Catch Input Rising Edge
Catch Input Falling Edge
2.
Select
Catch Input
in the Groups 1 through 4 pull-down list boxes. The Catch Input dialog box appears.
3.
Select
Catch Input Rising Edge
or
Catch Input Falling Edge
in the pull-down list.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
