9 Inside 800
9.5 Time behavior of the inputs and outputs
Control Relay easy800
11/11 MN04902001Z-EN
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9.5 Time behavior of the inputs and outputs
The response time, which is measured from the reading in of a digital input
signal to the setting of the associated output, is determined by the timing
characteristics of the device inputs and outputs as well as the size and
design of the circuit diagram.
Input delay (debounce)
The time required to switch the inputs and outputs in the circuit diagram can
be increased on the easy800 device using an input delay, the so-called
DEBOUNCE,
Section 8.2.1, “Switch on input delay“, Page 302.
This function is useful, for example, in order to ensure a clean switching
signal despite contact bounce.
Figure 211:
easy800
input assigned a switch
easy800 DC and easy800 AC units function with different input voltages and
therefore also have different evaluation methods and delay times.
9.5.1 Delay time on
800 DC devices
Delay time with DEBOUNCE activated
When DEBOUNCE is activated, the delay time for DC signals is 20 ms.
Figure 212:Delay times for evaluating an DC input signal and an activated DEBOUNCE
An input signal S1 must therefore be > 15 V on the input terminal for at least
20 ms before the switch contact will change from 0 to 1 (A). If applicable, this
time must also include the cycle time (B) since a easy800 device does not
detect the signal until the start of a cycle.
S1
0V
I1
A
C
1
0
1
0
S1
B
B
B
B
B
I1
