User Manual of A90 Series Inverter
198
deceleration time 4
F08.48
Running time of the
fifteenth segment
0.0 - 6000.0
s/min
5.0
●
When the simple PLC is running, the operating frequency, operating direction,
acceleration/deceleration time and operating time in the entire segment can be set separately.
This is described below with the 13
th
segment (the last segment) as an example. The
specific operation is shown in Fig. 7.
F08.12=50.00
: the operating frequency of 13
th
segment is 50.00Hz.
F08.43=31
: the operating direction in the 13
th
segment is reverse, and the acceleration and
deceleration are controlled based on the acceleration and deceleration time 4
(F15.07/F15.08).
F08.44=5.0
: the operating time in the 13
th
segment is 5.0s (F08.18=0 by default).
7.10
PID Function Parameter Group of F09 Group
The A90 series inverter has a process PID function, as described in this section.
Process PID control is mainly for pressure control, flow control and temperature control.
Ts
KpKi
Kp
KpKdTs
dt
d
Ref
Fdb
Out
+
+
+
+
Fig. 7-26 Block Diagram of Process PID
PID control is a kind of closed-loop control. The output signal (Out) of the object
controlled by the system is fed back to the PID controller, and the output of the controller is
adjusted after PID operation, thus forming one or more closed loops. This function is to
make the output value (Out) of the object controlled by the system consistent with the set
target value (Ref). The specific block diagram is shown in Fig. 7-26.
The PID controller is used for control by calculating the control quantity with three
calculation factors, i.e. proportion (P), integral (I) and differential (D), according to the
difference between the set target (Ref) and feedback signal (Fdb). The features of each
