Danfoss VLT AQUA Drive FC 202 Instruction Manual page 15

Introduction
mechanical brake (if connected) remains
activated.
1.3 Reapply 24 V DC to terminal 37. The test step
is passed if the motor remains in the coasted
state, and the mechanical brake (if connected)
remains activated.
1.4 Send Reset signal (via bus, digital I/O, or
[Reset] key). The test step is passed when the
motor becomes operational again.
The commissioning test is passed if all four test steps 1.1,
1.2, 1.3 and 1.4 are passed.
Case 2: Automatic Restart of Safe Stop is wanted and
allowed (that is, Safe Stop only where 5-19 Terminal 37
Digital Input is set to [3], or combined Safe Stop and MCB
112 where 5-19 Terminal 37 Digital Input is set to [7] PTC 1
& Relay W or [8] PTC 1 & Relay A/W):
2.1 Remove the 24 V DC voltage supply to
terminal 37 by the interrupt device while the
adjustable frequency drive drives the motor (that
is line power supply is not interrupted). The test
step is passed when
•
the motor reacts with a coast, and
•
the mechanical brake is activated (if
connected)
•
the alarm "Safe Stop [A68]" is displayed
in the LCP, if mounted
2.2 Reapply 24 V DC to terminal 37.
The test step is passed if the motor becomes operational
again. The commissioning test is passed if both test steps
2.1 and 2.2 are passed.
NOTE!
See warning on the restart behavior in 1.6.1 Terminal 37
Safe Stop Function
WARNING
The Safe Stop function can be used for asynchronous,
synchronous and permanent magnet motors. Two faults
can occur in the power semiconductor of the adjustable
frequency drive. When using synchronous or permanent
magnet motors a residual rotation can result from the
faults. The rotation can be calculated to Angle = 360/
(Number of Poles). The application using synchronous or
permanent magnet motors must take this residual rotation
into consideration and ensure that it does not pose a
safety risk. This situation is not relevant for asynchronous
motors.
®
VLT AQUA Drive
Instruction Manual
®
MG20M922 - VLT is a registered Danfoss trademark
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