Function description
Operating Manual PMCprotego S2-2(-C)
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4.3.7
Safe direction - SDI
The safety function "safe direction" (SDI) monitors the defined direction of rotation of the
drive axis (clockwise or anti-clockwise).
Input and output assignment in the Configurator:
}
Inputs I0 ... I6
–
SDI Neg. Activate
–
SDI Pos. Activate
}
Outputs O0 … O3
–
SDA Safe Direction Acknowledge
Prerequisites for normal operation:
}
Input "SS1 Activate" and "Reset": "1" Signal (+24 VDC)
}
"Ready" output: "1" Signal (+24 VDC). The safety card is ready for operation.
}
"STO Acknowledge" output: “0” Signal
}
Input "SDI Pos Activate": "1" Signal (+24 VDC)
}
Input "SDI Neg Activate": "1" Signal (+24 VDC)
The safety function is activated via
}
1/0 pulse edge at the input "SDI Pos Activate"
or
}
1/0 pulse edge at the input "SDI Neg Activate"
Reaction:
}
SDI delay time starts
}
Once the SDI delay time has elapsed, the direction of rotation is monitored
}
Output "SDA Safe Direction Acknowledge": "1" signal
}
If the direction of rotation is violated, safety function SS1 (E-STOP braking ramp) is ac-
tivated.
