Eurotherm 6100, User Manual

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100/180MM DISTRIBUTED GRAPHIC RECORDER: USER GUIDE
Page 133 HA029324
Issue 11 Oct 14
4.3.13 Counters
INTRODUCTION
The virtual channels option introduces a user-confi gurable number of counters, which can be preset,
disabled, incremented or decremented by Job action. If access is permitted, the user can preset the
counter to a selected value, as and when required, from the confi guration page. See
section 4.7 for Job
details and section 4.3.22 for a description of virtual channels. If the Batch option is fi tted (section 4.3.10 ),
then batches can be started whenever counter 1 changes value, and if this is done, the current value of
counter 1 is appended to batch fi eld 1. (Other counters can be selected for batch initiation, but opera-
tion is not guaranteed)
CONFIGURATION
Figure 4.3.13 shows a typical (enabled) counter confi guration page. The page is accessed from the Root
menu/Operator/Confi g menu.
Apply Discard
Counter number
Select counter
number
Enable
Select Alarm number
Alarm Number
Enable
Job Number
Category
Select: Off,
Unlatched,
Latched,
Trigger
Select Job category
Value
Units
Preset
Preset now
Units
Descriptor
Units
Scale Low
Scale High
Units
Units
Zone Low
Zone High
%
%
Colour
Scale Type
Select None or Linear None
A/B Switching
Select Job number
1) Counter 1
1
Off
1
No Action
OFF
Units
0
Counter 1
0
1
0
100
0
Figure 4.3.13 Typical Counter confi guration menu
CONFIGURABLE PARAMETERS
Counter number Allows any of the available counters to be selected for confi guration
Enable Allows the user to start/stop counting by enabling/disabling the counter.
Value Shows the current dynamic value of the counter
Units Allows a text string of up to 5 characters to be entered as a units description
Preset Allows a counter value to be entered for manual or job action preset.
Scale low/high The values to appear at the scale end points. If A/B switching is enabled, a second set
of scale low and scale high values can be entered. ‘A’ values are used during normal
operation. ‘B’ values are switched to by job action, as described in
section 4.7 .
The remaining confi guration items are as described for input channels in section 4.3.3 except that Log/
Linear scale type is not available.
Note: An absolute high alarm (for example) with a threshold of 10, will not be triggered until
the value exceeds 10 (i.e. counter value = 11). In order to trip the alarm at 10, a threshold
lower than 10 must be entered (e.g. threshold = 9.5). A similar situation exists for absolute
low and deviation alarms.