Omron SYSMAC CS Series Operation Manual page 456

CIO Area
Limitations on Input bits
Input Response Time
Settings
Output Bits
Normal I/O Refreshing
418
Switch 16
Switch 17
Switch 31
There is no limit on the number of times that input bits can be used as nor-
mally open and normally closed conditions in the program and the addresses
can be programmed in any order.
An input bit cannot be used as an operand in an Output instruction.
00001
The input response times for each CS-series Input Unit can be set in the PLC
Setup. Increasing the input response time will reduce chattering and the
effects of noise and decreasing the input response time allows higher speed
input pulses to be received.
The default value for input response times is 8 ms and the setting range is 0 to
32 ms.
Note If the time is set to 0 ms, there will still be an ON delay time of 20 µs max. and
an OFF delay time of 300 µs due to delays caused by internal elements.
Input from switch
Input bit
A bit in the I/O Area is called an output bit when it is allocated to an Output
Unit. The ON/OFF status of an output bits are output to devices such as actu-
ators. There are three ways for the status of output bits to be refreshed to an
Output Unit: normal I/O refreshing, immediate refreshing, and IORF(097)
refreshing.
The status of output bits are output to external devices once each cycle after
program execution.
In the following example, CIO 000201 is allocated to an actuator, an external
device connected to an output terminal of an Output Unit. The ON/OFF status
of CIO 000201 is output to that actuator once each cycle.
Input Unit
Switch 0
Switch 1
Switch 15
Read
when
IORF
(097)
is
execu-
ted.
000100
Not allowed if CIO 000100 is an input bit.
Pulses shorter than the time
constant are not received.
Input time constant
Section 9-4
CPU Unit
Input time constant