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274 Actual signals and parameters
5 = DI5 – Enables the Interlock function, and assigns a digital input (starting with DI5)
to the interlock signal for each PFA relay. These assignments are defined in the
following table and depend on:
• The number of PFA relays (number of parameters
) with value
= 31 (PFA).
• The Autochange function status (disabled if
= 0, and
otherwise enabled).
8121
REG BYPASS CTRL
0…1
1
0
Selects the Regulator by-
pass control. When
enabled, the Regulator
by-pass control provides
a simple control mecha-
nism without a PID regu-
lator.
• Use the Regulator by-
pass control only in
special applications.
0 = NO – Disables the
Regulator by-pass
control. The drive
uses the normal PFA
.
1 = YES – Enables the
Regulator by-pass
control.
• The process PID
regulator is
bypassed.
Actual value of PID is used as the PFA reference (input). Normally EXT REF2 is
used as the PFA reference.
• The drive uses the feedback signal defined by
(or 4114) for the
PFA frequency reference.
• The figure shows the relation between the control signal
(or 4114)
and the speed regulated motor’s frequency in a three-motor system.
Group 81: PFA control
Code
Description
Range
Resolution
Default
S
No. PFA relays
Autochange disabled (8118)
Autochange enabled (8118)
0
DI1…DI4: Free
DI5: Speed Reg Motor
Not allowed
1
DI1…DI4: Free
DI5: Speed Reg Motor
DI1…DI4: Free
DI5: First PFA Relay
2
Not allowed
DI1…DI4: Free
DI5: First PFA Relay
3…5
Not allowed
Not allowed
f
MAX
A = No auxiliary motors running
B = One auxiliary motor running
C = Two auxiliary motors running
A
f
MIN
B
C
(%)
f
OUT
Содержание ACS320 series
Страница 1: ...ABB drives User s manual ACS320 drives 0 5 to 30 hp ...
Страница 4: ......
Страница 18: ...18 Safety ...
Страница 28: ...28 Operation principle and hardware description ...
Страница 56: ...56 Electrical installation ...
Страница 142: ...142 Program features Connection diagram example ACS320 xx xxxx x ...
Страница 282: ...282 Actual signals and parameters ...
Страница 358: ...358 Fieldbus control ...
Страница 376: ...376 Fault tracing ...
Страница 382: ...382 Maintenance and hardware diagnostics ...
Страница 407: ...Dimension drawings 407 Frame size R2 NEMA 1 Frame size R2 IP20 NEMA 1 3AUA0000051097 A ...
Страница 409: ...Dimension drawings 409 Frame size R3 NEMA 1 Frame size R3 IP20 NEMA 1 3AUA0000051118 A ...
Страница 411: ...Dimension drawings 411 Frame size R4 NEMA 1 Frame size R4 IP20 NEMA 1 3AUA0000051133 A ...
Страница 412: ...412 Dimension drawings ...
Страница 413: ...Index Numerics A B C D E F G H I K L M N O P R S T ...
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