ContaminationSensor – CS 2000 series
HYDAC Filtertechnik GmbH
en
Page 46
BeWa CS2000 3117721e en.doc
2008-03-28
9
PLC interface output signals
Depending on the set output format (ISO code or NAS/SAE classes), the PLC
interface either outputs a three-value ISO code or the NAS/SAE classes of the four
particle size channels coded in the form of pulses.
The number of pulses output corresponds to the ISO class + 1 or the SAE/NAS
class + 1. (This means class "0" can also be output.)
The default pulse frequency is approx. 10 Hz (50ms high / 50ms low), but can be
changed in parameter mode, e.g. divided by 2 (
→10
0ms high / 100ms low), 3
(
→15
0ms high / 150ms low) or 4 (
→
200ms high / 200ms low).
There is a 1 second pause between outputting the two values of the ISO code or
between the NAS/SAE classes of two channels (irrespective of the pulse frequency
selected).
The measurement result is output again after 10 seconds (irrespective of the pulse
frequency selected). The output is not synchronized with the measurement interval.
This means once an output is started it is continued to its conclusion, even if a new
measured value becomes available in the meantime.
In the event of a flow or device error, no pulses are output via the PLC interface.
The same applies if the measurement is stopped (modes M3 and M4).
High
Low
5+1 Pulse
NAS Klassen : 5, 6, 6, 5
5+1 Pulse
6+1 Pulse
6+1 Pulse
High
Low
17+1 Pulse
ISO Code 17/14/11
14+1 Pulse
11+1 Pulse
Figure 1: Examples
