42
ECB Mode of Operation
General Information
The ECB has four modes of operation: drive,
bypass, auto bypass, and test. The mode is
selected through the drive keypad and dis-
play. Bypass mode select can be accessed
directly by pressing the DRIVE/BYPASS key
on the keypad.
Prior to Enabling Mode of Operation
•
Complete the start-up procedure and
verify motor rotation direction in by-
pass is correct and that the system is
ready in all respects for continuous full
speed operation in bypass.
•
Press the OFF/RESET key on the drive
keypad to prevent operation of the motor.
Operation
Drive mode.
The motor is connected to and
controlled by the drive. Contactors M1 (op-
tional) and M2 are closed while contactor M3
is open. (Contactor M1 for test mode is only
present in the 3-contactor configuration.) The
motor will not run until a run command is
present.
Bypass mode.
The motor operates at full
speed across the line when a run command
is present. Contactor M3 is closed and M1
(optional) and M2 are open.
Test mode.
Test mode puts the panel into
bypass mode and will automatically run in
bypass. Contactor M1 is closed supplying
power to the drive for test purposes while M2
is open. Contactor M3 controls the operation
of the motor in bypass, closed to run the
motor, open to remove power. The control
keys on the drive keypad will not control the
bypass until test mode is removed.
Auto bypass mode.
When in drive mode,
auto bypass is a timed interval that allows a
fault condition in the drive to activate running
the motor in bypass without operator inter-
vention.
Mode of Operation Select
•
Mode of operation is programmed
through the 31-00 parameter group.
See Table 6-5 below.
Table 6-5. Bypass Parameter Functions
Parameter Number
Selection
Function
Selects source of motor power.
(0) Drive (drive mode)
31-00
Bypass Mode
(1) Bypass (bypass mode)
Sets a delay time for starting in bypass that allows for
external actions to take place prior to line starting the motor.
31-01
Bypass Start
Time Delay
0-60 Seconds (default value is 5 seconds)
Setting a value other than 0 seconds enables auto bypass.
Bypass trip delay sets the delay time before switching to
bypass mode when the drive has a fault.
31-02
Bypass Trip
Time Delay
0-300 seconds (default is 0 seconds = OFF)
Setting to enabled puts bypass in test mode. See manual for
warnings and cautions.
(0) disabled (default value)
31-03
Test Mode
Activation
(1) enabled
Read only display which shows the bypass status in hex.
See Table 6-6 for details.
31-10
Bypass Status
Word
0, 2
16
-1 (default value is 0)
31-11
Bypass Running
Hours
Read only display which shows bypass running hours.