Setup guide

MN03902004E 7 November 2006
Programming the S811
A Digital Interface Module (DIM) is used to program all
models of the IT . S811 Soft Starter.
Using the DIM
Referring to Figures 14 and 15 —
• The Status Bar at the top of the display indicates the
operating and communicating status of the S811 and DIM.
•
The three Soft Key Functions at the bottom of the
display indicate the functions of the Soft Keys
(pushbuttons) directly below them. The Soft Key
Functions will change as you navigate through the
different menus of the DIM.
•
The center of the display shows the value of the
selected S811 parameter. The default display at
power-up is “3 ø Line Currents”.
•
Pages 14 – 21 show how the S811’s parameters are
organized within the menu structure. Navigating
through the menus down to the parameters is
straightforward if you understand a few basic
concepts.
1. The Escape Key (ESC) moves you from the User
Display to the Parameter Edit Screen.
2. The PREV and NEXT soft keys (Figure 15) scroll
from menu to menu (left and right).
3. The far right soft key will allow you to take action
(Enter, Edit, More, Send, …) to “drill down” into
the menu or parameter.
4. When you enter a menu, the Previous and Next
soft keys scroll from parameter to parameter (up
and down) in that menu.
5. The Escape Key backs you out of the current
parameter or menu.
For further information on the operation, including access
levels of the DIM, refer to the IT. S811 Soft Starter User
Manual (Pub. No. MN03902002E) available at the Eaton
Electrical Web Site www.EatonElectrical.com.
Figure 14: Digital Interface Module (DIM) — Display Mode
Figure 15: Digital Interface Module (DIM) — Parameter Edit Mode
Soft Starter Operating Modes
The IT. S811 Soft Starter will start a motor and its load in
one of two modes, Voltage Ramp or Current Limit. The
mode is set by the Start Method parameter.
Voltage Ramp Start
Starting at an initial value set by the Initial Torque
parameter, the voltage applied to the motor is gradually
increased at a rate that will reach rated voltage at the time
set by the Soft Start Time parameter. As the voltage
increases, the motor develops torque that accelerates the
load. When the S811 senses that the motor is up to speed,
it quickly completes the voltage ramp and closes the
bypass contactor.
It should be noted that a lightly loaded motor takes less
torque, and thus lower voltage and time, to accelerate to
full speed. For this case the S811 will go into bypass before
the ramp reaches full voltage. In other words, the S811
may go into bypass before the Soft Start Time has elapsed.
Figure 16: Ramp Start
Current Limit Start
During a Current Limit Start the S811 applies a constant
voltage to the motor, resulting in limited current flowing
through the motor’s windings. This mode is typically used
when it is necessary to limit current during start due to line
power limitations or other considerations. The level of
current is set by the Initial Torque parameter.
Note: Current Limit Starts are not recommended on
variable torque load applications such as fans and pumps.
ESC
ONLN SS OXFDO1 H STOP
3 Line Currents
XXXX L1 Amp
XXXX L1 Amp
XXXX L1 Amp
JOG RESET H
->
A
Status Bar
Soft Key Functions
Soft Keys
Predefined Keys
ESC
PREV
ONLN SS OXFDO1 H STOP
Monitoring
NEXT ENTER
Status Bar
Soft Key Functions
Soft Keys
Predefined Keys
Initial
Torque
Kick
Start
Tor q
Kick Start Time
Bypass
Bypass
Voltage
Ramp
Rated
Voltage
Soft Start Time
Start Run
Torq ue
Time (Seconds)
100%
Start Run
Speed
Time (Seconds)
100%
MN03902004E.fm Page 7 Tuesday, November 28, 2006 8:49 AM