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8 SmartWire-DT
8.9 Programming
168
The remote tripping function is activated by output byte 0, bit 1 (R_TRIP).
Soft starter DS7-SWD stops and input byte 1 bits 4 to 6 (trip indication)
continually indicates a remote tripping.
Overload relay function (ZMR)
In the event of an overload, the ZMR overload relay function makes it
possible to switch off the motor not by tripping the PKE motor-protective
circuit-breaker, but by switching off the DS7-SWD soft starter instead as
soon as the PKE motor-protective circuit-breaker's thermal motor model
reaches a value of 110 %.
The ZMR function will only be active if the manual/automatic switch on the
DS7-SWD communication module is set to A = Automatic.
If the ZMR function is deactivated by the HOST during a trip operation
caused by the ZMR function, the trip operation will remain active as long as
the thermal motor model is < 100 %. During this time, 5
for the differential trip indication.
In the event of a malfunction in the communications between the soft starter
and the motor-protective circuit-breaker, or whenever the soft starter is
switched on, the ZMR function in the motor-protective circuit-breaker will be
deactivated; the motor-protective circuit-breaker will trip by itself.
The function is activated with output byte 0, bit 2. Due to safety reasons, the
function will only be active if it remains continuously (cyclically) enabled via
the host.
￫
In the event of a phase unbalance and activated ZMR function,
the value of the thermal motor image is raised from 100 % to
110 % after a trip. The availability of the switched-off DS7-SWD
soft starter will be restored when the value falls below 100 %.
￫
The control bits for activating and deactivating the ZMR function
are only found in profiles 1 to 9 (profiles for operation with PKE).
DANGER
Never disconnect the communication link between the
PKE-SWD-32 motor-protective circuit-breaker and the PKE trip
block after an overload while the ZMR function is enabled, as
this can cause the DS7-SWD soft starter to be switched on if
a switch command is present.
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
will be signalled
hex
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