Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
User Menu A Commissioning
Advanced
Parameters
Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 419
Issue Number: 1
If LV Supply Mode Enable (O12) = 0 then Active Supply (O09) = 0. If LV Supply Mode Enable (O12) = 1 then Active Supply (O09) = 0 when the d.c.
link voltage is above the upper under-voltage threshold otherwise it is one.
The power for the drive control system is either taken from the user 24 V power supply or the main supply (i.e. derived from the power circuit d.c. link).
If Low Under Voltage Threshold Select (O13) = 0 and LV Supply Mode Enable (O12) = 0 and User Supply Select (O10) = 0 then the supply used is
determined as follows for drive sizes 5 and below. (For drive sizes 6 and above a diode OR system is used to select the required power supply, and
so this is done automatically in hardware.)
1. When the drive first powers up it tries to use the main supply or the user 24 V supply in turn until the drive starts up, beginning with the main
supply.
2. If the main supply is active and the d.c. link voltage (D.C. Bus Voltage (J65)) falls to a level where it is no longer possible to communicate with the
power stage then the drive attempts to switch over to the user 24 V supply. If the user 24 V supply is not present then the drive will power down,
otherwise it will continue to run off the user 24 V supply. The level at which the power stage powers down depends on whether the user 24 V
supply is present or not. However this is usually below half the minimum for Standard Under Voltage Threshold (O11).
3. If the user 24 V supply is being used and the d.c. link voltage (D.C. Bus Voltage (J65)) rises above 95 % of the minimum for Standard Under
Voltage Threshold (O11) then the drive attempts to switch to the main supply.
The following should be noted:
1. Parameters can be saved by setting Parameter mm.000 (mm.000) to 1 or 1000 (not in under-voltage state) or 1001 and initiating a drive reset.
Power-down save parameters are saved when the under-voltage state becomes active.
2. If the drive is powered from the user 24 V supply and then the main supply is activated but is not above 95 % of the minimum for Standard Under
Voltage Threshold (O11) then the drive will continue to be powered from the user 24 V supply. If the user 24 V supply is subsequently removed
the drive will power down, but then if the main supply is high enough will power up again on the main supply.
If Low Under Voltage Threshold Select (O13) = 1 or LV Supply Mode Enable (O12) = 1 or User Supply Select (O10)
= 1 then the 24 V user supply is
a
lways selected. If the user 24 V supply is not present then a PSU 24 V is initiated. The following should be noted:
1. The drive will still power-up on the main supply even if the user 24 V supply is not present because the drive tries each supply in turn to power up,
however the drive will remain in the tripped state until the user 24 V supply is activated.
Parameters can only be saved by setting Parameter mm.000 (mm.000) to1001 and initiating a drive reset. Power-down save parameters are not
saved when the under-voltage state becomes active.
O09 Active Supply
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum
1
Default Units
Type 1 Bit Volatile Update Rate Background write
Display Format Standard Decimal Places 0
Coding RO, ND, NC, PT
O10 User Supply 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
O11 Standard Under Voltage Threshold
Mode Open-Loop, RFC-A, RFC-S
Minimum -VM_STD_UNDER_VOLTS Maximum VM_STD_UNDER_VOLTS
Default See exceptions below Units V
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, VM, RA
Voltage Default Value
200V 175
400V 330
575V 435
690V 435
To Next Page
Loading...
