Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide
423
Issue Number: 1
To ensure that the soft-start is in the correct state to protect the drive and to ensure that the under-voltage condition is detected correctly the following
additional restrictions are applied:
1. The soft-start cannot change from the active state (i.e. internal soft-start contactor closed) unless the d.c. link voltage is above the upper under-
voltage threshold or
Under Voltage System Contactor Closed
(
O16
) = 1.
2. The
Under Voltage Contactor Close Output
(
O15
) parameter is set to 1 if the d.c. link voltage is above the upper under-voltage threshold or the
Final drive enable = 1. The
Under Voltage Contactor Close Output
(
O15
) is only set to 0 if the soft-start is fully active.
The following diagram shows how these restrictions apply to the system timing when Lower Threshold
≤
D.c. Bus Voltage
(
J65
)
Backup Supply Mode for frame size 07 drives and larger: (LV Supply Mode Enable (O12) = 1)
Backup supply mode is intended to provide a smooth transition, without disabling the drive, from a high voltage a.c. supply to a low voltage d.c.
backup supply and vice versa. The following diagram is a simple representation of the power circuit required. This does not include the necessary
circuit protection components or possible battery charger, etc.
See
Standard Under Voltage Threshold
(
O11
). Also see
User Supply Select
(
O10
) for details of when and how drive parameters can be saved, and
when a
PSU 24 V
trip can occur.
See
Standard Under Voltage Threshold
(
O11
). Also see
User Supply Select
(
O10
) for details of when and how drive parameters can be saved, and
when a
PSU 24 V
trip can occur.
O12
LV Supply Mode Enable
Mode
Open-Loop, RFC-A, RFC-S
Minimum
0
Maximum
1
Default
0
Units
Type
1 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
0
Coding
RW
O13
Low Under Voltage Threshold Select
Mode
Open-Loop, RFC-A, RFC-S
Minimum
0
Maximum
1
Default
0
Units
Type
1 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
0
Coding
RW
Soft-start active
Under-voltage
Active
(L19)
Under-voltage timing with
Back-up Supply Mode Enable
(O12) = 1
(Frame sizes 07 and smaller and d .c. link voltage between the upper and lower under -voltage threshold )
Final drive enable
Under-voltage
System Contactor
Close
(O15)
Under-voltage
System Contactor
Closed
(O16)
Soft-start cannot change to inactive state
until
Under-voltage System Contactor
Closed
(O16) = 0
Under-voltage System Contactor Close
(O15) is not set to one until the soft-start
is fully active
Содержание 03200106
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