Rockwell Automation 1336F PLUS II Custom Firmware Instructions - EN921 - Manual (Page 5)

EN921 - Variable Voltage w/ PI Power/Current Control 5
Voltage PI
[PI Status]
This parameter displays the status of the Process PI
regulator.
Parameter Number 214
Parameter Type Read Only
Factory Default None
[PI Ref Select]
The source of the PI reference is selected with this param-
eter. The value from the selected reference is the “set
point” for the Process PI regulator.
Parameter Number 215
Parameter Type Read/Write
Factory Default “Volt Preset”
Units Display Drive
“Analog In 0” 0
“Analog In 1” 1
“Analog In 2” 2
“Volt Preset” 3 Refer to [Volt Preset] Value
“Adapter 1-6” 4-9
“Volt Cmd Ref” 10 Refer to [Volt Command Ref] Value
“%Power Ref” 11
“%Current Ref” 12
[PI Fdbk Select]
The source of the PI feedback is selected with this param-
eter. It identifies the input point for the process feedback
device.
Parameter Number 216
Parameter Type Read/Write
Factory Default “Analog In 1”
Units Display Drive
“Analog In 0” 0
“Analog In 1” 1
“Analog In 2” 2
“Volt Preset” 3 Refer to [Volt Preset] Value
“Adapter 1-6” 4-9
“Volt Cmd Ref” 10 Refer to [Volt Command Ref] Value
“%Power Ref” 11
“%Current Ref” 12
[PI Reference]
This parameter displays the current value of the reference
selected by [PI Ref Select].
Parameter Number 217
Parameter Type Read Only
Display Units / Drive Units None / 4096 = 100%
Factory Default None
Minimum Value –4915
Maximum Value 4915
Diagram 1
Time
Enable
PI
Output
Command
Output
Volts
Disable
0 24 21 27 30 18 15 12 9 6 3
Enable PI output integrates from zero – drive ramps
to regulated voltage.
Disable PI output is forced to zero – drive ramps to
unregulated voltage.
Enable PI output steps to preload and integrates
from there – drive steps to preload and
ramps from there.
Disable PI output is forced to zero - drive ramps to
unregulated voltage.
Enable PI output integrates from preload – drive
ramps from preload.
Disable PI output is held at preload - drive ramps to
unregulated voltage (min. preload).
Note: Drive will step output equal to preload on start.
Diagram 2
Enable Disable
0 24 21 27 30 18 15
Preload
12 9 6 3
Diagram 3
Enable Disable
0 24 21 27 30 18 15 12 9 6 3
Preload
Preload
Preload at Start
Preload at Start
Preload
Feed forward effect for
more dynamic response
Better response for
well defined systems
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Enabled
Spares