Function description
Operating Manual PMCprotego S12(C)
1002528EN03
38
Timing diagram:
STO delay time
Tolerance window
SS1 Activate
SS1 SIL3/Reset
Ready
STO Acknowledge
SDI Neg Activate
SDI Pos Activate
SDA Safe Direction
Acknowledge
Fig.: Safety function SDI
}
t
1
: Activation of safety function SDI
}
t
2
: Once the SDI delay time has elapsed, the direction of rotation is monitored
}
SS1 Activate: Input for safety function SS1
}
SS1 SIL3/Reset: Input for SIL 3 and reset
}
SDI Pos Activate: Input for safety function SDI, positive direction is monitored
}
SDI Neg Activate: Input for safety function SDI, negative direction is monitored
}
Ready: Output for operating status of safety card and second output for feedback from
safety function STO
}
STO Acknowledge: Output for feedback from safety function STO
}
SDA Safe Direction Acknowledge: Output for feedback from safety function SDI
Switching the direction of rotation while safety function SDI is active
}
When changing the direction of the motor, please note: Monitoring of the old direction
must be deactivated first, before monitoring of the new direction of rotation is activated!
(See Case A in the illustration). If an SDI delay time t
m
has been configured, it will start
when the new direction of rotation monitoring is activated. In A, the SDI delay time t
m
is
shown = 0.
