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Activation
The bypass without synchronization (p1260 = 3) can be triggered using the following signals
(p1267):
● Bypass using control signal (p1267.0 = 1):
The bypass is triggered using a digital signal (p1266) (e.g., from a higher-level
automation system). If the digital signal is canceled, a swichover to converter operations
is triggered once the debypass delay time (p1263) has expired.
● Bypass at a specific speed threshold (p1267.1 = 1):
Once a certain speed is reached, the system switches to bypass (i.e., the drive is used as
a starting drive). The bypass cannot be connected until the speed setpoint is greater than
the bypass speed threshold (p1265).
The system reverts to converter mode when the setpoint (at the input of the ramp-
function generator, r1119) falls below the bypass speed threshold (p1265). The setpoint >
comparison value condition prevents the bypass from being reactivated straight away if
the actual speed is still above the bypass speed threshold (p1265) after switching back to
converter operations.
The bypass time, debypass time, bypass speed variables and the command source for
switching over are set using parameters.
Parameterization
Once the bypass without synchronization (p1260 = 3) function has been activated, the
following parameters must be set.
Table 9- 12
r1261.0
r1261.1
p1262 =
p1263 =
p1264 =
p1265 =
p1266 =
p1267.0 =
p1267.1 =
p1269[0] =
p1269[1] =
p3800 = 0
P1200 = 1
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
Parameter settings for bypass function with synchronizer without degree of overlapping
Parameter
Signal "Command switch motor - power unit" (contactor K1)
Signal "Command switch motor - line" (contactor K2)
Bypass dead time setting
Debypass delay time setting
Bypass delay time setting
Speed threshold setting when p1267.1 = 1
Control signal setting when p1267.0 = 1
Trigger signal setting for bypass function
Signal source to provide the feedback signal of contactor K1
Signal source for contactor K2 feedback
Synchronization is deactivated.
The "flying restart" function is always active.
Functions, monitoring and protective functions
Description
9.4 Extended functions
619
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