Commissioning
4 Commissioning
4.1 Safety Instructions
CAUTION
ELECTRICAL HAZARD
4
4
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.
8
Safe Torque Off
®
PTC Thermistor
Danfoss A/S © 01/2018 All rights reserved.
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:
1.
Reapply 24 V DC supply to terminal 37.
2.
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
Sayfayı Yazdır