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Function description
Operating Manual PMCprotego S12(C)
1002528EN03
31
}
Outputs O0 … O3
– SRA Safe Range Acknowledge
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 operation.
}
"STO Acknowledge" output: “0” Signal
}
Input "SLS Activate": "1" Signal (+24 VDC)
}
To achieve SIL3 or PL e: Connect the output "STO SIL3" to servo amplifier terminal
X4A/ 3.
Safety function is activated
}
By a 1/0 pulse edge at the input "SLS Activate".
Reaction:
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SLS delay time starts
}
Once the SLS delay time has elapsed, the speed is monitored.
}
Output "SRA Safe Range Acknowledge": "1" signal
}
If the limit value is exceeded, safety function SS1 (ESTOP braking ramp) is activated.
A tolerance range may also be set for the limit values used to monitor the speed. This toler
ance range modifies the set limit values. As a result, oneoff or periodic overshoots that ex
ceed the limit values can be tolerated.
The following values can be set for the tolerance range:
}
Tolerance amount, which takes into account the size of the overshoots.
}
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:
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The tolerance range becomes active the first time the speed limit value is exceeded
(see flowchart).
Reaction:
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If the tolerance range is exceeded, the safety function SS1 (ESTOP braking ramp) is
activated.
The following diagrams illustrate the sequences, with and without the tolerance range activ
ated.