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[1.7 APPLICATION FUNCT.]
(FUn-)
Scaling of feedback and references:
• PIF1, PIF2 parameters
Can be used to scale the PID feedback (sensor range).
This scale MUST be maintained for all other parameters.
• PIP1, PIP2 parameters
Can be used to scale the adjustment range, i.e., the reference. The adjustment range MUST be within the sensor range.
The scaling parameters must not exceed a value of 32767. To simplify setup, we recommend that you use values as close as possible
to this maximum limit but remain within powers of 10 in respect of the actual values.
Example (see the graph below): Adjustment of the volume in a tank, between 6 m
3
and 15 m
3
.
- Sensor used 4-20 mA, 4.5 m
3
for 4 mA, 20 m
3
for 20 mA, with the result that PIF1 = 4500 and PIF2 = 20000.
- Adjustment range 6 to 15 m
3
, with the result that PIP1 = 6000 (min. reference) and PIP2 = 15000 (max. reference).
- Example references:
- rP1 (internal reference) = 9,500
- rp2 (preset reference) = 6,500
- rP3 (preset reference) = 8,000
- rP4 (preset reference) = 11,200
The [DISPLAY CONFIG.] menu can be used to customize the name of the unit displayed and its format.
Other parameters:
• rSL parameter:
Can be used to set the PID error threshold, above which the PID regulator will be reactivated (wake-up) after a stop due to the max.
time threshold being exceeded at low speed (tLS).
• Reversal of the direction of correction (PIC): If PIC = nO, the speed of the motor will increase when the error is positive, for example:
pressure control with a compressor. If PIC = YES, the speed of the motor will decrease when the error is positive, for example:
temperature control using a cooling fan.
• UPP parameter:
If PIC = nO, can be used to set the PID feedback threshold, above which the PID regulator will be reactivated (wake-up) after a stop
due to the max. time threshold being exceeded at low speed (tLS).
If PIC = YES, can be used to set the PID feedback threshold, below which the PID regulator will be reactivated (wake-up) after a stop
due to the max. time threshold being exceeded at low speed (tLS).
• The integral gain may be short-circuited by a logic input.
• An alarm on the PID feedback may be configured and indicated by a logic output.
• An alarm on the PID error may be configured and indicated by a logic output.
PID feedback
Adjustment range
(reference)
PIP2 (15000)
PIP1 (6000)
PIF1
(4500)
PIF2
(20000)
Summary of Contents for ER40-G
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