The Ssr Signals - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
When ramp monitoring is used, time monitoring is also used. The ramp monitoring monitors that the initial speed change after the
function is requested obeys the set deceleration ramp. Select the monitored ramp with parameter SSR Ramp Monitoring. It is possi-
ble to monitor the minimum ramp, the maximum ramp, or both these ramps.
The ramp monitoring starts after the time that is set in SSR td1 elapses. The time delay of SSR td1 starts when the SSR function
becomes active. The ramp monitoring ends when the SSR function is reached. If the speed does not obey the parameterized ramp
during the monitoring, the SQS function becomes active as a violation response. The ramp monitoring does not continue when the
speed is in the safe speed range.
The ramp monitoring is used for both the deceleration and the acceleration to a safe range.
The ramp monitoring is always active according to the parameters of the selected ramp. If the selected ramp has both acceleration
and deceleration, monitoring for both is active. On the opposite side to the actual executed ramp monitoring, the ramp monitoring
is limited to the monitored limit. This means that during ramp monitoring it is possible for the speed to cross the safe range and
cause a ramp violation on the other limit.
Speed
SSR Max Limit
SSR Min Limit
Illustration 60: Ramp Monitoring During Acceleration to the Safe Range

6.3.4.4 The SSR Signals

It is possible that the Active and Reached signals that are mentioned in this chapter are not always available in all interfaces.
The availability of the signals over safe fieldbus depends on the used fieldbus protocol. Refer to chapter Safe fieldbuses for more
information.
Table 39: The SSR Signals
Signal Activation and deactivation of the signal
SSR Active Activation:
• SSR is requested and starts execution.
Deactivation (manual acknowledgment):
• Acknowledgment signal received and SSR is not requested.
Deactivation (automatic acknowledgment):
• SSR request ends.
Deactivation (SSR violation situations):
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N O T I C E
SSR td1
SSR td2
SSR t1
N O T I C E
Safety Functions
t
Description
The signal indicates The signal indicates
if the SSR function is if the SSR function is
being executed. being executed.
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