System Manual V2 – MOVITRAC® B
145
6
PI controller
Project Planning
6.19.3 Actual value detection
The unipolar input AI1 is the actual value input.
You can set the operating mode for the actual value using
P112 AI1 operating mode
(see also parameters 116 … 119):
•
0 ... 10 V
: The following applies to operation as a voltage input:
0 ... 10 V = 0 ... 100 % PI controller actual value
•
0 ... 20 mA: The following applies to operation as a current input:
0 ... 20 mA = 0 ... 100 % PI controller actual value
•
4 ... 20 mA: The following applies to operation as a current input:
4 ... 20 mA = 0 ... 100 % PI controller actual value
6.19.4 Reference message
With this parameter, you can program a reference message with regard to the actual
value of the PI controller. By doing this, you can monitor the actual value for violation of
a limit value.
You have to program a binary output terminal to "PI controller actual value reference" to
issue the reference signal. The reference message operates with a hysteresis of 5 %.
The reference signal does not have a delay time and signals "1" depending on P451.
You must program the binary output DO01 P620, DO02 P621 or DO03 P622 to PI
controller actual value reference.
6.19.5 Inverter control
You can determine the direction of rotation by using the terminals for the direction of
rotation "CW/Stop and "CCW/Stop".
Upon enable, the inverter increases the speed up to P301 Minimum speed using the
P130 Speed ramp. PI control becomes active once the minimum speed is reached. The
PI controller correcting variable directly determines the speed setpoint.
If you revoke the CW/CCW terminal, the inverter deactivates PI control and stores the
I-component of the PI controller. The speed decreases using the speed ramp (P131). If
you enable the inverter before the drive has reached its stop speed, the PI controller
becomes active again with the current setpoint.
If you stop the inverter with the "Enable/Stop" terminal, the drive decelerates with the
stop ramp. The inverter stores the I-component of the controller.
With setpoint source RS485 or SBUS, the value of the PO data item determines the di-
rection of rotation. "PI-REGLER %" and the value of the PO data item "PI-REGLER %"
act as a setpoint for the PI controller.
P450
PI actual value reference
0
... 100 [%]
Step width:
0.1 %
P451
Signal = "1" when
PI actual value < PI reference
PI actual value > PI reference
Summary of Contents for MOVITRAC MC07B0037-2A3-4-00
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