Lenze E82MV752_4B

Function library
Configuration of analog and digital setpoints and actual values
7−38
L
EDB82MV752 EN 5.2
Example: Calibration when using a process controller
Example for pressure control
If, for instance, the control range of a pressure control is to be limited to a value lower than the rated
sensor value P
r
, the effective pressure setpoint can be proportionally reduced through the gain of
the analog input (C0027, C0414):
 Actual pressure value via pressure sensor (P
r
= 0 − 200 mbar) at X3/2U (C0412/5 = 4).
 Analog pressure setpoint via X3/1U (C0412/4 = 1).
 The maximum pressure is to be limited to 120 mbar. Reduce the effective pressure setpoint via
the gain of the analog input:
C04141 
P
1
P
N
 100% 
120mbar
200mbar
 100%  60%
Gain calculation
Gain[%] 
f(P
2
)  f(P
1
)
U(P
2
)  U(P
1
)
 100% 
 30%  100%
100%  20%
  100% 162.5%
Offset calculation
Offset(P
2
)[%] 
f(P
2
)[%]
Verstärkung[%]
 100%  U(P
2
)[%] 
 30%
 162.5%
 100%  100% 81.5%
Example: Calibration when using a process controller
Example for pressure control
The control range of a pressure control is to be limited to a value lower than the rated sensor value
P
N
. For this purpose, the effective pressure setpoint can be proportionally reduced through the gain
of the analog input (C0027, C0414):
 Actual pressure value via pressure sensor (P
N
= 0 − 200 mbar) at X3/2U (C0412/5 = 4).
 Analog pressure setpoint via X3/1U (C0412/4 = 1).
 The maximum pressure is to be limited to 120 mbar. Reduce the effective pressure setpoint via
the gain of the analog input.
C04141 
P
1
P
N
 100% 
120mbar
200mbar
 100%  60%