Function description
Operating Manual PMCprotego S2-2(-C)
1002529-EN-04
37
Timing diagram:
v
t
Reset
1
0
1
0
s (t)
1
0
1
0
1
0
SS1 Activate
Ready
STO Acknowledge
SDI
1
0
SDA Safe Direction
Acknowledge
SDi Neg Activate
SDI delay time
1
0
SDi Pos Activate
t1
t2
Tolerance window
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
}
Reset: Input for reset
}
SDI Pos Activate: Input for safety function SDI, clockwise rotation is monitored
}
SDI Neg Activate: Input for safety function SDI, anti-clockwise rotation 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.
