Counter Configuration - Siemens FEC920 User Manual

6.5.4 Counter configuration

This allows the user to set up a counter to count trigger inputs (or it may be incremented from the Configuration
page. The Rollover Value of the counter is configurable (default 1,000,000). Counters can be cascaded by wir-
ing from 'Rollover' of one counter to 'trigger' of the next. Wiring is carried out from the operator interface (Section
10) or in iTools (Section 9).
For 'Trend', 'Alarm 1' and 'Alarm 2' configurations please see the relevant parts of Section 6.4.
Virtual Channel.1.Main
Descriptor
Operation
Resolution
Low Cut Off
High Cut Off
Preset Value
Rollover Value
Descriptor
Type
Operation
PV
Status
Resolution
Units
Low Cut Off
High Cut Off
Input1
Preset
Preset Val
Trigger
Page 88
FEC920: USER GUIDE
VirtualChan1
Type Counter
On
PV 123436 units
Status Good
0
Units units
0
999999
Input1 015.3241
Preset 0
0
Trigger No
Rollover No
1000000
Disable
Figure 79 Typical Counter configuration
Allows the user to enter a descriptor (20 characters max.) for the counter.
Select: Math, Counter or Totalizer.
Allows the user to enable ('On') or disable ('Off') the counter.
Read only. Shows the dynamic value of the counter.
Read only. Reflects the status of the input channel.
Allows the number of decimal places (up to six) to be defined for the channel.
Allows a units string of up to five characters to be entered for the counter value.
Specifies a value below which the counter will not decrement.
Specifies a value above which the counter will not increment.
The amount by which the counter is incremented each time 'Trigger' goes high. The value
may be entered manually, or wired from another parameter. Negative values cause the
counter to decrement.
Setting this to 'Yes' causes the counter to adopt its Preset Value. The field returns
immediately to 'No'. The counter can also be preset by wiring from another parameter.
Allows the entry of a value, from which the counter is to start incrementing or
decrementing.
Setting this to 1, causes the current value of the input source to be added to the Counter
value. This function can be carried out manually, or the input can be wired from another
parameter (Section 10.2).
A5E45696052A Rev-AA
Counter 1
Input 1 Rollover
6
1 to 10
Counter 2
Input 1 Rollover
6 12
10 to 10
Counter 3
Input 1
12
10 to 10
Figure 78 Cascading counters
etc.
Rollover
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