Connection To Pc; Safe Stop - Danfoss vlt fcd 302 Operating Instructions Manual

Installation
• •
Selecting a specific communication protocol
changes various default parameter settings to
match that protocol's specifications along with
making additional protocol-specific parameters
available
•
Control card options are available to provide
additional communication protocols. See the
option-card documentation for installation and
operation instructions
•
•
•

2.4.15 Connection to PC

To control the frequency converter from a PC, install the MCT
10 Set-up Software.
The PC is connected via a standard (host/device) USB cable,
or via the RS-485 interface.
Illustration 2.12 USB Connection
CAUTION
The USB connection is galvanically isolated from the supply
voltage (PELV) and other high-voltage terminals.
The USB connection is not galvanically isolated from
protection earth. Use only isolated laptop/PC as connection
to the USB connector on frequency converter or an isolated
USB cable/converter.

2.4.16 Safe Stop

The FCD 302 is available with safe stop functionality via
control terminal 37. Safe stop disables the control voltage of
the power semiconductors of the frequency controller
output stage which in turn prevents generating the voltage
required to rotate the motor. When the Safe Stop (T37) is
activated, the frequency converter issues an alarm, trips the
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unit, and coasts the motor to a stop. Manual restart is
required. The safe stop function can be used for stopping the
frequency converter in emergency stop situations. In the
normal operating mode when safe stop is not required, use
the frequency converter's regular stop function instead.
When automatic restart is used – the requirements according
to ISO 12100-2 paragraph 5.3.2.5 must be fulfilled.
Liability Conditions
It is the responsibility of the user to ensure personnel
installing and operating the Safe Stop function:
•
Read and understand the safety regulations
concerning health and safety/accident prevention
•
Understand the generic and safety guidelines given
in this description and the extended description in
the Design Guide
•
Have a good knowledge of the generic and safety
standards applicable to the specific application
User is defined as: integrator, operator, servicing,
maintenance staff.
Protective Measures
•
Safety engineering systems may only be installed
and commissioned by qualified and skilled
personnel
•
The cable between terminal 37 and the external
safety device must be short circuit protected
according to ISO 13849-2 table D.4
•
If any external forces influence the motor axis (e.g.
suspended loads), additional measures (e.g., a
safety holding brake) are required in order to
eliminate hazards
Safe Stop Installation and Set-Up
WARNING
Safe Stop Function!
The safe stop function does NOT isolate mains voltage to the
frequency converter or auxiliary circuits. Perform work on
electrical parts of the frequency converter or the motor only
after isolating the mains voltage supply and waiting the
length of time specified under Safety in this manual. Failure
to isolate the mains voltage supply from the unit and waiting
the time specified could result in death or serious injury.
•
It is not recommended to stop the frequency
converter by using the Safe Torque Off function. If
a running frequency converter is stopped by using
the function, the unit will trip and stop by coasting.
If this is not acceptable, e.g. causes danger, the
frequency converter and machinery must be
stopped using the appropriate stopping mode
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