Specifications

Comfort Reference Value – 5th Generation of STÖBER Inverters STÖBER
ANTRIEBSTECHNIK
6. Available Reference Values
KSW-45
You can specify in parameter G102 (set source of PID controller) which signal sets
(presets) the PID controller. You can use the setting of G14 to parameterize how the
initialization is to be performed. The following choices are available (Figure 6-25):
• G14 = 0: Normal
When G14=0, no initialization takes place with "set PID controller" during control
operation.
• G14 = 1: Output = I-Portion = 0
When G14=1, the output and the I-portion are held to 0% when the "set PID controller"
signal is queued.
Practical application:
The "set PID controller" signal is queued before the enable and remains set. The
enable is given and the motor is energized. Regardless of the control difference the
PID output and the I-portion remain at 0%. The motor is only run via "feed forward." If
the system is stable and not vibrating, PID control can be switched on by removing the
"set PID controller" signal.
• G14 = 2: Output = I-Portion = G13
When G14=2, the output and the I-portion are held to the value entered in G13 (PID
initialization value) when the "set PID controller" signal is queued.
Practical application:
During control mode, the "set PID controller" signal can be used to set the output and
the I-portion back to the starting value as with Enable On.
• G14 = 3: Output = G13, = I-Portion = Output - P
When G14=3 and the "set PID controller" signal is queued, the output is held to the
value entered in G13 (PID initialization value) and the I-portion sets itself to the value
PID - P.
Practical application:
During control mode, the "set PID controller" signal can be used to freeze the output to
the value in G13 and the I-portion sets itself according to the P-portion.
• G14 = 4: Output = PID, I-Portion = Hold G13
When G14=4 and the "set PID controller" signal is queued, the output can be
calculated according to the control error G180, the P-gain G06 and a fixed I-portion
(G19=G13). The I-portion is held at the value entered in G13 (PID initialization value).
Practical application:
During control mode, the "set PID controller" signal together with G13=0% can be used
to disable the I-portion and control only with the P-portion. This can be useful for
vibration analysis.
Figure 6-25 Setting the initialization behavior
NOTE
The PID controller can also be switched off with a falling edge of the "disable PID
controller" signal (monitoring parameter G301) and set with the rising edge of the
"enable" signal (parameter A900). However, this setting procedure is different from
initialization via PID controller. The PID controller output and the I-portion are always set
with G13 (PID initialization value) when "enable" and "disable PID controller" occur. "Set
PID controller" causes the PID controller to be initialized based on the setting of the
parameter G14 (PID mode).
PID controlle
r
Upper limit
Source PID
controller set
(
G102
)
G08
G09
G08
G14
PID=P+I+D
PID=0
I=0
1
0
1
0
2
3
4
PID=
I=
G13
G13
PID=
I= - P
G13
G13
PID=P+ +D
I=
G13
G13
PID controlle
r
Lower limit
PID mode
PID