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8 SmartWire-DT
8.9 Programming
8.9.3.3 Selecting a profile
166
Thermal motor map on PKE (TH)
Depending on the current range and the actual power flow, the PKE motor-
protective circuit-breaker calculates the thermal state of the motor and
provides it as a data byte. The thermal load of the motor is mapped via input
byte 3. The value is displayed as a relative value in the ranges 0 % (00
255 % (FF
).
hex
The main circuits are interrupted as a result of a motor overload if the thermal
motor image is 110 %. In the event of phase failure or phase unbalance, the
main circuits are interrupted at a value of 100 % of the thermal motor image.
In the event of a phase unbalance and trip caused by an overload, the value
of the thermal motor image is raised from 100 % to 110 %.
The appropriate profile can be selected by the user.
•
A PKE will be installed upstream of the DS7-SWD unit – motor starter
compatibility:
If only a simple start/stop command is required, any of the three PKE
profiles can be chosen based on the desired PKE functionality
(￫ section 8.9.3.1, "Introduction", page 159).
•
No PKE will be installed upstream of the DS7-SWD unit:
If the control specifics need to be comparable to those characterizing
terminal-based operation and the following functions are desired with
enable and start/stop:
•
an error message,
•
an alarm message,
•
A TOR signal and/or a RUN signal
any one of profiles 4, 5, or 6 – based on the desired PKE
functionality – or profile 10, if there is no PKE installed upstream of
the DS7-SWD unit, can be chosen
(￫ section 8.2, "Profiles for DS7-SWD", page 146 and ￫ table 28,
page 160).
•
Complete control is required:
If complete control with all options is desired or if the following functions
are needed:
•
Closing lockout,
•
External current limiting function
•
Programmable response in the event of a loss of communications
•
Feedback regarding the thermal load on the DS7-SWD
any one of profiles 7, 8, or 9 – based on the desired PKE
functionality – or profile 11, if there is no PKE installed upstream of
the DS7-SWD unit, can be chosen.
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
) to
hex
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