Danfoss VLT HVAC Drive FC 102 Інструкція з експлуатації Посібник з експлуатації - Сторінка 11

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Danfoss VLT HVAC Drive FC 102 Інструкція з експлуатації Посібник з експлуатації

Commissioning

4 Commissioning

4.1 Safety Instructions

See chapter 2 Safety for general safety instructions.

4.2 Activation and Termination of Safe

Torque Off

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 need to 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 (T37) 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 12100-2 paragraph

5.3.2.5 are fulfilled, before using the automatic restart

function.

4.3 Parameter Settings for STO in

Combination with Thermistor Module

MCB 112

When MCB 112 is connected, additional selections are

available for 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 an alarm "Dangerous Failure

[A72]" and coast the frequency converter safely,

without automatic restart.

•

Selections [4] PTC 1 Alarm and [5] PTC 1 Warning

are not to be selected when an external safety

device is used. Those selections are for when only

MCB 112 uses the Safe Torque Off.

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

selected and the external safety device triggers

Safe Torque Off, the frequency converter issues

an alarm "Dangerous Failure [A72]" and coasts

the frequency converter safely, without automatic

restart.

VLT

Frequency Converters - Safe Torque Off Operating Instructions

•

CAUTION

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:

•

See Operating Instructions for Thermistor Module MCB

112 for further information.

4.4 Automatic/Manual Restart Behaviour

By default the STO function is set to unintended restart

prevention behaviour. To terminate STO and resume

normal operation:

Set the STO function to automatic restart by setting the

value of 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, as soon as the 24 V DC is

applied to terminal 37. No reset signal is required.

MG37D102 - Rev. 2013-11-15

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

for the combination of external safety device and

MCB 112.

the unintended restart prevention is

implemented by other parts of the Safe Torque

Off installation, or:

a presence in the dangerous zone can be

physically excluded when Safe Torque Off is not

activated. In particular, paragraph 5.3.2.5 of ISO

12100-2 2003 must be observed.

Reapply 24 V DC supply to Terminal 37.

Give a reset signal (via Bus, Digital I/O, or [Reset]

key).