Introduction 1
1 - 5
Digital Inputs
Read
Read the ON or OFF state of
all
inputs.
Pulse widths
The duration of a single pulse or total on/ off time of
consecutive pulses can be resolved to the nearest 0.01
seconds for a max total of 10.9 min, or 46.6 Hrs with
multiplied resolution. Positive or negative edges initiate
measurements. The time scale can be multiplied by a factor
of 1-256on a system wide basis.
Pulse Counting
Pulses can be counted up to a total of 65,535. To be reliably
counted, pulses must have a minimum On and minimum
OFF times of 1 msec. Thus the maximum counting rate for a
50% duty cycle squarewave with equal ON and OFF times
for a total of 2 msec would be 500HZ.
Edge Detection
Off-to-On and On-to-Off transitions can be detected within
1 msec of their occurrence. Action is only reported each 10
msec.
Note:
The response time performance of digital input instructions
can be limited by the delay in the input modules themselves
which can have ON plus OFF delays of up to 40 msec.
Digital Outputs
Set outputs
Can set
individual
or
multiple
outputs ON or OFF.
Modifiers
One Shot
Can generate ON or OFF pulse durations of up to 655.35
seconds with a resolution of 0.01 seconds. Resolution can be
further multiplied by a factor of 1-256 on a system wide
basis.
Delayed
Can generate delayed ON or OFF outputs of up to 655.35
seconds with a resolution of 0.01 seconds. Resolution can be
further multiplied by a factor of 1-256 on a system wide
basis.
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