Advertisement
4
Function Description
4.3
Safety functions
4.3.5
Safely limited speed - SLS
4- Sicherheitsfunktion_SLS_Ueber
Safely limited speed - SLS
Sicherheitsfunktion_Sxx_Voraussetzung_S1
Sicherheitsfunktion_SLS_Voraussetzung
Sicherheitsfunktion_Sxx_Voraussetzung_SIL3
Sicherheitsfunktion_SLS_Ausloesung
Sicherheitsfunktion_SLS_Reaktion
Sicherheitsfunktion_SLS_SSR_Toleranz
4-20
The safety function "safely limited speed" (SLS) monitors the drive to
check that it stays within a defined speed limit.
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 "SLS 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 "SLS Activate".
Reaction:
SLS delay time starts
Once the SLS delay time has elapsed, the speed is monitored.
Output "SRA Acknowledge": "1" Signal
If the limit value is exceeded, safety function SS1 (E-STOP braking
ramp) 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.
Activate the tolerance range:
The tolerance range becomes active the first time the speed limit val-
ue is exceeded (see flowchart).
Advertisement
Chapters
