Operating & Mounting instructions – 8 074 143.03/03 – Page 42
Bypass signal:
An activation of the command leads an holding of
the running motor after mains operaiton.
After the switch-over from bypass to inverter ope-
ration, the inverter takes over the running motor
after the waiting time set with parameter b003.
If the speed of the motor has declined during this
time the matching (restart) frequency set with
parameter b007, a restart is done at 0 Hz.
Software lock:
This function allows an additional lock for
parameter changes via the terminals. Thus, it is
possible e.g. to lock the parameter editing
function via an externa key switch.
Contact open: parametrization enabled,
Contact closed: parametrization locked.
Switch-over to automatic reference value
(4..20 mA)
By closing the contact, it is possible to define the
frequency ref. value usnig a current input signal
(4...20mA). When the contact is open, the
frequency is defined via a voltage input signal
(0...10V). If the contact is closed, the frequency is
defined via the 4...20 mA analog input (terminals
OI - L). If the contact is open, the analog signal
0...10 V (terminals O - L) is conductive. If no
digital input is parametrized for this function, the
two reference values are added (f-correction).
15 Software lock
14 Bypass signal
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