NIVELCO MultiCONT - Page 76

prw2101a0600p_01  76 / 105
PV rate of change
Default: „Invert = OFF”
The MultiCONT counts PV rate of change in every 5 seconds.
When there are more transmitters in the loop and cycle time is
more than 5 seconds, PV_Rate is calculated per cycles.
( t1-t2  5sec )
PV rate of change speed is [ PV/min] =( PV
t1
-PV
t2
)*60/( t1-t2)
There are two operation m odes, depending on the value of the
parameters:
1.
RP1 > RP2 ≥ 0
For example: Relay becomes energized when level is
increasing in the tank too fast.
2.
RP1 < RP2 ≤ 0
For example: Relay becomes energized when level is
decreasing in the tank too fast.
Inversion of the operation can be performed with selecting
„Invert = ON”
RP1
RP2
PV rate
of change
t
RP1
RP2
Energized
De-Energized
RP1>RP2≥0
t
RP1
RP2
Energized
De-Energized
RP1<RP2≤0
PV rate
of change