Danfoss vlt fcd 302 Manual de instrucciones - Página 10

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Commissioning

4 Commissioning

4.1 Safety Instructions

CAUTION

ELECTRICAL HAZARD

The operator or electrical installer is responsible for

proper grounding and compliance with all applicable

national and local safety regulations.

See chapter 2 Safety and the relevant frequency converter

operating instructions/guides. Also, always observe the

instructions provided by the motor manufacturer.

4.2 Activation of STO

The STO function is activated by removing the voltage at

terminal 37 of the frequency converter. By connecting the

frequency converter to external safety devices providing a

safe delay, an installation for a Safe Stop 1 can be

obtained. External safety devices must fulfill Cat./PL or SIL

when connected to terminal 37. The STO function can be

used for asynchronous, synchronous, and permanent

magnet motors.

When the STO function (terminal 37) is activated, the

frequency converter issues an alarm, trips the unit, and

coasts the motor to a stop. Manual restart is required. Use

the STO function to stop the frequency converter in

emergency stop situations. In normal operating mode

when STO is not required, use the standard stop function

instead. Ensure that requirements according to ISO 12100

paragraph 6.3.3.2.5 are fulfilled before using the automatic

restart function.

4.3 Parameter Settings for STO in

Combination with VLT

Card MCB 112

When MCB 112 is connected, more selections are available

for parameter 5-19 Terminal 37 Safe Stop ([4] PTC 1 Alarm to

[9] PTC 1 & Relay W/A).

•

Selections [1]* Safe Stop Alarm and [3] Safe Stop

Warning are still available, but are for installations

without MCB 112 or any external safety devices.

If [1]* Safe Stop Alarm or [3] Safe Stop Warning are

selected and MCB 112 is triggered, the frequency

converter reacts with alarm 72, Dangerous Failure

and coasts the motor safely, without automatic

restart.

•

Do not select [4] PTC 1 Alarm and [5] PTC 1

Warning when an external safety device is used.

Only use those selections when only MCB 112

uses the STO.

Safe Torque Off

PTC Thermistor

If selection [4] PTC 1 Alarm or [5] PTC 1 Warning is

selected and the external safety device triggers

STO, the frequency converter issues alarm 72,

Dangerous Failure and coasts the motor safely,

without automatic restart.

•

Select [6] PTC 1 & Relay A to [9] PTC 1 & Relay W/A

for the combination of external safety device and

MCB 112.

CAUTION

AUTOMATIC RESTART

Selections allow for automatic restart when the external

safety device is de-activated.

Before selecting [7] PTC 1 & Relay W or [8] PTC 1 & Relay

A/W, ensure that:

•

The unintended restart prevention is

implemented by other parts of the STO instal-

lation, or

•

A presence in the dangerous zone can be

physically excluded when STO is not activated.

In particular, paragraph 6.3.3.2.5 of ISO

12100:2010 must be observed.

See VLT

PTC Thermistor Card MCB 112 Operating

Instructions for further information.

4.4 Automatic/Manual Restart Behavior

By default, the STO function is set to unintended restart

prevention behavior. To terminate STO and resume normal

operation:

Reapply 24 V DC supply to terminal 37.

Give a reset signal (via bus, digital I/O, or [Reset]

key).

Set the STO function to automatic restart by setting the

value of parameter 5-19 Terminal 37 Safe Stop from default

value [1]* Safe Stop Alarm to value [3] Safe Stop Warning.

Automatic restart means that STO is terminated, and

normal operation is resumed, when the 24 V DC is applied

to terminal 37. No reset signal is required.

MG37D502