Pump Control Quick Guide
11
Special Functions
H91: C1 Signal disconnection Detection
Disconnection of pressure sensor (cable failure).
When a value is stored in parameter H91 (between 0.1 and 60.0 seconds) the inverter will generate an
alarm (CoF) when it notices that C1 signal current is missing (C1 current < 2mA) during a time longer
than the value in H91.
H91 = 0 function disabled.
H91 ≠ 0 function enabled.
PID and pump control
J01: PID control. Mode selection
When J01 = 1 and the error between Set Point and Process Value is positive (SP - PV > 0), the PID
controller makes a positive output action control (MV > 0).
Alternatively, if J01 = 2 and the error between Set Point and Process Value is negative (SP – PV < 0) the
PID controller still makes a positive output action control (MV > 0).
J03: PID Control. P Gain
This parameter is used to set the PID controller’s proportional gain (P). This parameter must be adjusted
as it is needed on every application.
A high P value produces a PID controller’s quick response. Otherwise, a low P-value produces a slow
response.
J04: PID Control. Integral Time I
This parameter is used to adjust PID’s integral time (I). This parameter must be adjusted as it is needed
on every application.
A high integral time value produces a PID slow response. Otherwise, a low I value produces a quicker
response.
J18: PID control. Upper limit of PID process output
J19: PID control. Lower limit of PID process output
These parameters specify upper and lower limit process output values.
We set J18 = F15 = F03 and J19 = F16.
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