20 S611 Soft Starter MN03902011E—May 2012 www.eaton.com
Control Functions
Network Control
When the S611 is in network control, it is ready to respond to
motor START control commands issued only through the
network comms ports A and/or B. It is not necessary to
select either comms port A or comms port B.
The comms ports A and B enable complete communications
between the S611 and the network including changing
parameters settings, issuing control commands, and
monitoring selected operational values via DeviceNet,
Modbus, or PROFIBUS Networks. Comms port A provides
Modbus motor control commands.
Both comms ports may be used simultaneously and
independently configured.
Refer to Appendix F for Modbus Network control
information.
Profibus Network control information may be found in Eaton
publication MN04210003E.
DeviceNet Network control information may be found in
Eaton publication MN04210002E.
Local Control
S611 local control consists of Comms Select, Permissive,
Start, and Reset 120 Vac control commands to terminal
block 3 (TB3). The S611 cannot be started from the User
Interface Module.
Terminal block 3 (TB3) uses four (4) functions to control the
S611 soft starter.
1. Permissive (run enable)—Must be energized with
120 Vac to enable operation of all S611 soft starters by
both local and network control. If power is lost or
removed from Permissive terminal at any time, the unit
will initiate a coast stop, soft stop, or pump stop in
accordance with the setup parameter selections. If the
S611 is being controlled from a network, loss of the
Permissive signal will initiate a coast stop, soft stop, or
pump stop in accordance with the setup parameter
selections.
2. Start—If 120 Vac is present at the Permissive terminal,
momentary application of 120 Vac to the Start terminal
will initiate a voltage ramp or current limit start for the
S611 soft starter. Application of 120 Vac may be
maintained.
Note: With level sensing control, if 120 Vac is lost or
removed from the Permissive terminal at any time,
the unit will initiate a stop in accordance with setup
parameter selections. A restart will occur when
120 Vac is restored or reapplied if:
a) 120 Vac is present on the Start terminal
(maintained), and;
b) the UI device shows a ready LED (not faulted). If
the starter has faulted and the fault condition
clears AND the Auto Reset Mode parameter in
the Operation Mode list is set to AUTO, the
starter will restart.
See the Level or Edge Sensing section on Page 21 for
additional details.
CAUTION
If the AUTO Reset mode setting is used with level sensing,
CAUTION must be exercised to assure that any restart
occurs in a safe manner. Motor restart may occur
immediately and unexpectedly after any fault condition has
cleared.
3. Reset—Application of 120 Vac power to the Reset
terminal will reset the soft starter after all fault
conditions are cleared. If the fault LED is not able to be
reset, a fault condition still exists and must be corrected.
A reset signal may also be sent from any network
connection.
Network—When energized (maintained), selects the
network communications port A terminal block (TB4) and/or
network communications port B (TB5) as the source of
motor control. Both network communications ports may
be used to operate the S611 from a Modbus (native),
DeviceNet, or PROFIBUS network. When this terminal is
energized, Start commands from the start terminal block
(TB3) are not recognized. Both comms ports may be
used simultaneously and independently configured.
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