Counter Example - Siemens FEC920 User Manual

10.2

COUNTER EXAMPLE

This example shows how to set up a counter to be incremented each time Channel 1 Alarm 1 becomes active,
and reset each time channel 2, alarm 1 is acknowledged. For this example, Virtual Channel 3 will be configured
as the counter, with a preset value of 0.
1. At Channel.1.Main, set:
Type = test
Test Signal = Sine 4 min.
Scale Low = 0
Scale High = 100
2. At Channel.1.Alarm1, set:
Type = Abs Hi
Threshold = 50
Latch = None
3. At Channel.2.Main, set:
Type = Test
Test Signal = Sine 40 min.
Scale Low = 0
Scale High = 100
4. At Channel.2.Alarm 1, set:
Type = Abs Hi
Threshold = 90
Latch = Manual
5. At Virtual Channel.3.Main, set:
Type = Counter
Operation = On
Input = 1
All the other parameters can be left at their defaults.
6. Still at Virtual Channel 3 (Main), use the up/down arrow buttons to highlight 'Trigger'. Press and hold the
scroll key. The top level User Wiring page appears, this time with a 'From Source' tab as well as the 'To
Destination' tab of example 1. This is because this parameter is read/write, whereas Alarm Active is read
only (i.e. its value may be read but not changed).
7. Use the up (or down) arrow button to select the 'From Source' tab.
Preset Value
September 18
FEC920: USER GUIDE
Virtual Channel.3.Main
Status Good
Resolution 0
Units
Input 1
Preset No
0
Trigger No
Figure 131 Wiring a counter: part 1
A5E45696052A Rev-AA
User Wiring
Virtual Channel.3.MainTrigger
To Destination From Source
Add new wire
User Wiring
Virtual Channel.3.Main.Trigger
To Destination From Source
Add new wire
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