Switch 2: Selecting The Response Delay Time - DirectLOGIC DL405 Manual

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Switch 2:
Selecting the
Response Delay
Time
Positions 5,6,7 and 8 on Switch 2 control the response delay time for the first four
input points only (X0 – X3). The response delay is defined as follows:
Off-to-On Delay — the amount of time between the occurrence of the
field event, such as a switch closing, and the Interrupt module point
turning on.
On-to-Off Delay — the amount of time after the field event is complete,
such as a switch opening, and the Interrupt module point turning OFF.
Field Event
Field event occurs. This could be
a switch closing.
There are two speeds for response.
Slow Response — 0.88ms–6.47ms for off–to–on delay and
1.64ms–9.81ms for on–to–off delay.
Fast Response — 0.08ms to .59ms for off–to–on delay and
0.15ms–0.89ms for on–to–off delay.
You will notice a range of time shown. This means that there can be a variance in the
response times, so we recommend that you plan your application for the worst case
scenario.
Selecting a slower response time can be helpful if your critical field event input signal
is electrically noisy, or, if you expect contact bounce on the switch. (The slower
response provides more filtering and helps reduce the possibility of false input
signals. If you have input signals that are subject to these possibilities, it is best to
connect them to the first four inputs on the module.)
NOTE: This feature is available for the first four inputs (X0, X1, X2, and X3) only. The
response time for inputs X4, X5, X6 and X7 is not configurable. The off–to–on delay
and the on–to–off delay for these are fixed at the fast response delay time.
ON to OFF
delay
OFF to ON
delay