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4
Function Description
4.3
Safety functions
4.3.6
Safe speed range - SSR
4- Sicherheitsfunktion_SSR_Ueber
Safe speed range - SSR
Sicherheitsfunktion_Sxx_Voraussetzung_S1
Sicherheitsfunktion_SSR_Voraussetzung
Sicherheitsfunktion_Sxx_Voraussetzung_SIL3
Sicherheitsfunktion_SSR_Ausloesung
Sicherheitsfunktion_SSR_Reaktion
Sicherheitsfunktion_SLS_SSR_Toleranz
STO Acknowledge: Output for feedback from safety function STO
SRA Acknowledge: Output for monitoring the limit value on the motor
The safety function "safe speed range" (SSR) monitors the drive's cur-
rent speed to ensure it stays within a maximum and minimum permitted
limit value.
Prerequisites for normal operation:
Input "SS1 Activate" and "SS1 SIL3/Reset": "1" Signal (+24 VDC)
"Ready" output: "1" Signal (+24 VDC). The safety card is ready for op-
eration.
"STO Acknowledge" output: "0" Signal
Input "SSR Activate": "1" Signal (+24 VDC)
To achieve SIL3 or Ple: Connect the output "STO SIL3" to servo am-
plifier terminal X4A/ 3.
Safety function is activated
By a 1/0 pulse edge at the input "SSR Activate".
Reaction:
SSR delay time starts
Once the SSR delay time has elapsed, the speed is monitored.
Output "SRA Acknowledge": "1" Signal
If the limit value is exceeded, safety function SS1 is activated.
A tolerance range may also be set for the limit values used to monitor
the speed. This tolerance range modifies the set limit values. As a result,
one-off or periodic overshoots that exceed the limit values can be toler-
ated.
The following values can be set for the tolerance range:
Tolerance amount, which takes into account the size of the over-
shoots.
Tolerance time, which takes into account the length of the overshoots
Tolerence period that takes into account the variation period
INFORMATION
See the Configurator's online help for details of how to set the
parameters for the tolerance range.
4-23
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