The Sqs Modes; The Sqs Signals - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide

6.2.5.2 The SQS Modes

When the SQS function is set to the SQS-STO mode, the normal STO(+SBC) parameterization is used to execute the STO(+SBC) func-
tion when the SQS function is requested. See
When the SQS function is set to the SQS-SS1 or the SQS-SS2 mode, the SQS parameters are used the same way as the corresponding
SS1 or SS2 parameters. The SS1 or SS2 parameters are not used. The behavior of the SQS-SS1 and the SQS-SS2 mode is the same as
that of the independent SS1 and SS2 functions. See
SOS Functions.
For SOS after SQS-SS2, the parameterization of normal SOS is used.
The SQS-SS1 and the SQS-SS2 functions are higher in priority than the independent SS1 and SS2 functions. See chapter
Introduction to the Safe Stopping
The SQS function does not use the shared ramp definitions. Instead the SQS function has its own ramp definition parameters. The
ramps are parameterized, calculated, and monitored the same way as other ramps. See

6.2.5.3 The SQS Signals

It is possible that the Active and Reached signals that are mentioned in this chapter are not always available in all interfaces.
The SS1 and SS2 signals do not become active when the SQS-SS1 or the SQS-SS2 mode is active. However, the SOS, the STO, and the
SBC signals become active when the corresponding SQS mode is active.
The availability of the signals over safe fieldbus depends on the fieldbus protocol that you use. Refer to chapter Safe fieldbuses
for more information. If the SQS function is not available in the fieldbus protocol, the fieldbus shows the signals of the SS1 or the
SS2 function instead.
Table 34: The SQS Signals
Signal Activation and deactivation of the signal
SQS Ac- Activation:
tive
• SQS is requested and starts execution. OR
• A safe monitoring function detects a violation and activates SQS.
Deactivation (manual acknowledgment):
•
Acknowledgment signal received after SQS is not requested. OR
• The violated safe monitoring function is reset.
Deactivation (automatic acknowledgment):
• SQS request ends. OR
• The violated function is reset.
Deactivation (SQS violation situations):
• Reset signal received after SQS had detected a violation and SQS has been acknowledged
(implicitly or explicitly).
SQS
Only activated when SQS has not detected any violations.
Reached
Activation:
• STO(+SBC) is reached (SQS_STO) OR
•
Time SQS t1 elapses (SQS-SS1 & SQS-SS2: only time monitoring used). OR
• Speed is below zero speed for time SQS td1 (SQS-SS1 & SQS-SS2: zero speed monitoring
used).
Danfoss A/S © 2021.06
6.2.2.1 Introduction to the STO and SBC
6.2.3.1 Introduction to the SS1 Function
N O T I C E
N O T I C E
Functions.
N O T I C E
Safety Functions
Functions.
and 6.2.4.1 Introduction to the SS2 and
6.1.7 Ramps.
Description
The signal indi-
cates if SQS func-
tion is being exe-
cuted.
The signal indi-
cates if SQS func-
tion has been
reached success-
fully.
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6.2.1