Ecb Mode Of Operation - Danfoss VLT FC Series Operating Instructions Manual

Electronically Controlled B...
•
[Auto On] allows the motor to be started
remotely from digital input or serial communi-
cations. Press [Auto On] to activate remote motor
start and stop from a digital input or serial
communications in drive or bypass mode.
•
Press [Drive Bypass] to initiate the display to
toggle between drive or bypass mode of
operation. Press [OK] to accept the change or
[Cancel] to cancel the action.
Parameter
0-44 [Off/Reset] Key
on LCP
0-45 [Drive Bypass]
6 6
Key on LCP
Table 6.7 LCP Control Keys Programming

6.1.7 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 LCP
and display. Bypass mode select can be accessed directly
by pressing [Drive Bypass] on the keypad.
Before enabling mode of operation
•
Complete the start-up procedure and verify
motor rotation direction in bypass is correct and
that the system is ready in all respects for
continuous full speed operation in bypass.
•
Press [Off Reset] on the LCP to prevent operation
of the motor.
50
Option Panel Operating Instructions
Function
This disables or enables the [Off/Reset] key.
[0] Disabled, [1] Enabled, [2] Password.
Default value is [1] Enabled.
This disables or enables the [Drive Bypass]
key . [0] Disabled, [1] Enabled, [2] Password.
Default value is [1] Enabled.
MG14I102 - VLT
Operation
Drive mode
The motor is connected to and controlled by the drive.
Contactors M1 (optional) 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 LCP 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 intervention.
Mode of operation select
•
Mode of operation is programmed through
parameter group 31-** Bypass Option, see
Table 6.8.
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