LION microPLC
▪
Operation
41
10.6
Inputs
10.6.1
Input LEDs
The LED of an input, which is supplied with power, is yellow. For example you
have switched the input I14, do the LED
I14
lights up.
If the voltage at the switched input is not detected, the LED does not shine. Make
sure that ground (
GND
) is connected.
10.6.2
Analog Inputs
The maximum sampling frequency for the analog inputs is 500 Hz. The time, in
which an input switches, can be determined by the following formula:
The applied frequency change at the input may not exceed the maximum
sampling frequency as well as the double task cycle time, otherwise a sub-
sampling will occur.
Example:
,
,
,
,
,
,
,
,
862.
4
4
4
4
6723
(5525
&$1
(7+
$33
,
,
,
,
,
,
,
,
86(55
4
4
4
4
(55
63'
4
4
8
B
581
&$1
B
(7+
B
$33
B
67
67
/
2 * task cycle time
= Frequency, in which the analog input switches
2 * task cycle time
= Frequency, in which the analog input switches
2 * 9 ms
= 18 ms
≙
55,56 Hz
The maximum task cycle time is 11 ms.