140
ACS510 User’s Manual
Start-Up
8121
REG BYPASS CTRL
Selects Regulator by-pass control. When enabled, Regulator by-pass control provides a simple control mechanism
without a PID regulator.
Use Regulator by-pass control only in special
applications.
0 =
NO
– Disables Regulator by-pass control. The drive
uses the normal PFC reference: 1106
REF
2
SELECT
.
1 =
YES
– Enables Regulator by-pass control.
• The process PID regulator is bypassed.
Actual value of PID is used as the PFC reference
(input). Normally
EXT
REF
2 is used as the PFC
reference.
• The drive uses the feedback signal defined by 4014
FBK
SEL
(or 4114) for the PFC frequency reference.
• The figure shows the relation between the control
signal 4014
FBK
SEL
(
OR
4114)
and the speed
regulated motor’s frequency in a three-motor
system.
Example: In the diagram below, the pumping station’s
outlet flow is controlled by the measured inlet flow (A).
8122
PFC START DELAY
Sets the start delay for speed regulated motors in the system. Using the delay, the drive works as follows:
• Switches on the contactor of the speed regulated motor – connecting the motor to the ACS510 power output.
• Delays motor start for the time 8122
PFC
START
DELAY
.
• Starts the speed regulated motor.
• Starts auxiliary motors. See parameter 8115 for delay.
Warning!
Motors equipped with star-delta starters require a PFC Start Delay.
• After the ACS510 relay output switches a motor On, the star-delta starter must switch to the star-connection and
then back to the delta-connection before the drive applies power.
• So, the PFC Start Delay must be longer than the time setting of the star-delta starter.
8123
PFC ENABLE
Selects PFC control. When enabled, PFC control:
• Switches in, or out, auxiliary constant speed motors as output demand increases or decreases. Parameters 8109
START
FREQ
1 to 8114
LOW
FREQ
3 define the switch points in terms of the drive output frequency.
• Adjusts the speed regulated motor output down, as auxiliary motors are added, and adjusts the speed regulated
motor output up, as auxiliary motors are taken off line.
• Provides Interlock functions, if enabled.
0 =
NOT
SEL
– Disables PFC control.
1 =
ACTIVE
– Enables PFC control.
2 =
CYCLE
SOFT
START
– Enables PFC control and use cycle soft-start function.
• Require parameter 8118 = value > 0 .
Code Description
P 4014
f
MAX
P 8110
P 8109
P 8113
P 8112
A = No auxiliary motors running
B = One auxiliary motor running
C = Two auxiliary motors running
A
f
MIN
B
C
(%)
f
OUT
M
3~
M
3~
M
3~
Outlet Pipe3
Outlet Pipe2
Outlet Pipe1
P1
P2
P3
Sewage
Tank
Contactors
P1
P2
P3
Mains 3~
3
3
3
3
ACS510
3
3
Inlet Pipe
A
Supplied from China by: Guangzhou Tofee Electro Mechanical Equipment Co., Ltd
Email: [email protected]