PL7 
Iconstant 
PL7 
Command Group: MassFlow  Access:  Network interfaces:  
RW  CANopen  SDO2B00sub07  
MODbus  250C,2  
PL7  Iconstant  PROFIbus  read 42,7 write 42,135 


PL7 Gain Factor Ki
The integrally acting controller summing the control deviation over time, and multiplies the sum (i.e. the integral) with the factor Ki and returns the result to the analog output without further delay. The Iregulated circuit is slow compared to other schemes. But it has the advantage that the deviation is completely eliminated. Depending of your application may be you have to use a P, PID, PI or PDController. Please find more basic information in the technical literature regarding “control and regulation technology”. The integral term is dependent on time. All timing related to this PID controller is based on time steps of Δt. The parameter Δt (PL3) used for the mass flow measurement is also used as time base for the PID controller. An internal delta time value used in the PID algorithm is calculated as PL3 x 0.01 sec. If PL3 is set e.g. to 100, the internal delta time value will be 100 x 0.01 = 1 sec, meaning that the PID calculation will be done once every second.
Available setup range: 999999 … 999999 without decimal point (!).
Please keep in mind, this value works always with 3 decimals.
Note: A setup for PL7 equals 1000 means, the gain factor Ki is 1 (which is 1.000). This means, the setup range of the gain factor Ki is approx. 1000 to +1000 (999.999 to +999.999).
See also
LS,
LI,
GF,
GR,
GM,
PL1,
PL2,
PL3,
PL4,
PL5.
And for the DAD:
VF,
GD,
PL6,
PL8,
PL9,
PL10,
PL11,
PL12,
PL13,
PL14,
PL15,
PL16,
PL17,
PL18,
PL19,
PL20,
PL21,
and AA