GE AV-300i, Руководство пользователя, Страница: 143 / 296

AV-300i Version 2 User’s Guide
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Ch.1
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The Feed-Forward Block is shown in the figure below.
PID FF mon
Int PID inp FF
PID inp FF gain
X
PID inp FF src
PID FF src
PID inp FF src
Definition of the feed-forward signal source
PID FF cfg
Int PID inp FF
Feed-forward internal reference
PID inp FF gain
Gain on the feed-forward signal
PID FF mon
PID inp FF mon Monitor for the feed-forward input value
PID FF mon
Monitor for the feed-forward output value
1.15.3 PID Input Block (PID Input)
The Block calculates the error value of the PID Block.
Two input references are selected via an internal selector.
On the selected reference it is possible to set a Ramp and to add an additional reference, Pid Draw.
It is also possible to limit the output error value at the machine start and to select a command for the reaction
of the PID section.
The PID set 0 src and PID set 1 src sources select the signal origin of the two input references:
PID seloff 0 src selects the command of the internal selector, PID draw src selects the additional reference
signal and PID fbk src selects the reaction command of the PID section.
In the configurations it is possible to set the variable internal values, with PID gain draw to adapt the error gain,
with PID acc time and PID dec time to set the reference ramp and with PID clamp top and PID clamp bot to set
the upper and lower limit (see the paragraph “Dynamic Clamp”).
The inputs are: · PID fbk src
· PID draw src
· PID set 0 src
· PID set 1 src
· PID seloff 0 src
Description:
APPL FUNCTION PID
PID input