Delta 28-299A Operations Instructions download pdf (Page 58)

5-4 Auto-Stop Time

Range: Function:

1 min* [00:01 -

24:00

(hrs:min)]

Sets the time for the soft starter to auto-

stop, in 24 hour clock format.

CAUTION

This function should not be used in

conjunction with remote two-wire

control. The soft starter will sti

ll accept

start and stop commands from the

remote inputs or serial communication

network. To disable loc

al or remote

control, use Par. 3-1 Local/Remote. If

auto-start is enabled and the user is in

the menu sy

stem, auto-start will

become active if the menu times out (if

no keypad activity is detected for five

nutes).

7.9 Auto-Reset

The MCD 500 can be programmed to automatically reset

certain trips, which can help minimise operating downtime.

Trips are divided into three categories for auto-reset,

depending on the risk to the soft starter:

Group

Current Imbalance

Phase Loss

Power Loss

Mains Frequency

Undercurrent

Instantaneous Overcurrent

Input A Trip

Motor Overload

Motor Thermistor

Starter Overtemperature

Other trips cannot be automatically reset.

This function is ideal for remote installations using 2-wire

control in Auto On mode. If the 2-wire start signal is present

after an auto-reset, the MCD 500 will restart.

6-1 Auto-Reset Action

Option: Function:

Selects which trips can be auto-reset.

Do not Auto-Reset

Reset Group A

Reset Group A & B

Reset Group A, B & C

6-2 Maximum Resets

Range: Function:

1* [1 - 5] Sets how many times the soft starter will auto-reset, if

it continues to trip. The reset counter increases by

one each time the soft starter auto-resets, and

6-2 Maximum Resets

Range: Function:

decreases by one after each successful start/stop

cycle.

NOTE

The reset counter will return to 0 if the starter is manually

reset.

7.9.1 Auto-Reset Delay

The MCD 500 can be configured to wait before auto-

resetting a trip. Separate delays can be set for trips in Groups

A and B, or in Group C.

6-3 Reset Delay Groups A & B

Range: Function:

5 secs* [00:05 - 15:00

(min:secs)]

Sets the auto-reset delay for

Group A and Group B trips.

6-4 Reset Delay Group C

Range: Function:

5 min* [5 - 60 (minutes)] Sets the auto-reset delay for Group C

trips.

7.10 Secondary Motor Set

7-1 Motor FLC-2

Range: Function:

[Motor

dependent]

Matches the starter to the second motor's

full load current. Set to the full load current

(FLC) rating shown on the motor nameplate.

7-2 Locked Rotor Time-2

Range: Function:

10 secs* [0:01 - 2:00

(min:secs)]

Sets the maximum length of the time

the motor can run at locked rotor

current from cold before reaching its

maximum temperature. Set according

to the motor datasheet.

If this information is not available, we

recommend the value should be less

than 20 seconds.

7-3 Start Mode-2

Option: Function:

Selects the start mode for the secondary

motor.

Constant Current

Adaptive Control

7-4 Current Limit-2

Range: Function:

350%* [100% - 600%

FLC]

Sets the current limit for constant current

and current ramp soft starting, as a

percentage of motor full load current.

Programming MCD 500 Operating Instruction

MG.17.K3.02 - VLT

is a registered Danfoss trademark 57

7 7

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Delta 28-299A Operations Instructions Page 58

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