West Control Solutions N8800 - Manual (Page 37)

Configuration level
8800 process controller 37 Configuration parameters
Name Value range Description Default
Src.3
Source of limit 3 0
0 process value
1 control deviation xw (process value - set-point)
2 control deviation xw (with suppression after start-up and
set-point change)
After switch-on or set-point changing, the alarm output is
suppressed, until the process value is within the limits for the
first time. At the latest after elapse of time 10 ti1 the alarm
is activated (ti1 = integral time 1; parameter r Cntr)
If ti1 is switched off (ti1 = 0), this is interpreted as Î ,
i.e. the alarm is not activated, before the process value was
within the limits once.
3 measured value INP1
4 measured value INP2
5 measured value INP3
6 effective setpoint Weff
7 correcting variable y (controller output)
8 control variable deviation xw (actual value - internal setpoint)
= deviation alarm to internal setpoint
9 difference x1 - x2 (utilizable e.g. in combination with process
value function “mean value” for recognizing aged
thermocouples
HC.AL
Alarm heat current function (INP2) 0
0 switched off
1 Overload short circuit monitoring
2 Break and short circuit monitoring
LP.AL
Monitoring of control loop interruption for heating 0
0 switched off / inactive
1 active.
If ti1=0 LOOP alarm is inactive!
dAc.A DAC alarm function 0
0 DAC alarm switched off / inactive
1 DAC alarm active
Hour OFF...999999 Operating hours (only visible with 8800/8840 configurator!) OFF
Swit OFF...999999 Output switching cycles (only visible with 8800/8840
configurator!)
OFF
Out.1
Name Value range Description Default
O.Act Method of operation of output OUT1 0
0 direct / normally open
1 inverse / normally closed
Y.1 Controller output Y1 1
0 not active
1 active