Programmable Parameters - Emerson Digistart CS User Manual

Safety Rating Data
Information
5.

Programmable Parameters

Adjustments
The motor data parameters are critical to the correct operation of the soft starter's thermal model,
and to the motor overload protection. Always set Pr 3 and 4 to suit the motor's characteristics.
WARNING
Figure 5-1 Adjustment switches
5s
2s 15s
70%
15s 2s
60%
5s 5s
2s 15s 50%
Off
1

Cur r ent Ramp Motor FLC
(% FLC/Ramp Time) (% Soft Starter FLC)
350%
8s 10s 12s
6s
400%
300%
4s
250% 450%
2

Cur r ent Limit Soft Stop T
(% Motor FLC)
Aux. Rel ay
Trip
8 10 12
ANY
6
14
4
16
FWD
2
20
3
Off

Motor T rip Phase
Class Sequence
7 8
Current Ramp
Current Limit
Motor Trip Class
Digistart CS User Guide
Issue: 2
Mechanical Electrical
Installation Installation
80%
90%
100%
4

14s
16s
2s
20s
5

ime
(seconds)
Run
10s
12s
8s
ANY
6s
14s
16s
4s
FWD
2s 20s
Off 6
 
Excess
Start Time
08324. A
Select the initial start current (A) and ramp time
(B).
Current ramp starting extends the time soft
starter takes to reach the current limit and is
suitable for generator set supplies, loads
requiring an extended start time or applications
with extreme load variation between starts.
The ramp time does not control the time the
motor will take to reach full speed.
Select the current limit (C).
The current limit is the maximum level of current
the soft starter will deliver to the motor during the
soft start.
Select the trip class for motor overload
protection.
The trip class reflects the maximum time (in
seconds) that the motor can run at locked rotor
current. The Motor Trip Class setting assumes a
locked rotor current of 600%.
Setting the motor trip class to "Off" disables
motor overload protection.
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Diagnostics
Programmable
Parameters
Current Ramp
Current Limit
Motor Trip Class
Motor FLC
Soft Stop Time
Excess Start Time
Auxiliary Relay Function
Phase Sequence Protection
Technical Data Options
Time
Time
13