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Function description
4.4
Operating mode of the servo amplifier
Activation of safety functions SS1 and SS2 has repercussions on the servo amplifier's oper-
ating mode:
SS1 when OPMODE = 0 ... 8
}
The drive-activated safety function "safe stop 1" (SS1) behaves the same in all of the
servo amplifier's operating modes, as ultimately the movement is not continued. The
safety card must be reset to resume operation.
}
The status of the safety card (SS1 activated) is transmitted to the servo amplifier. As a
result, the information is available to a higher level control system (status word).
}
The transfer of setpoint values from external servo amplifier interfaces (bus system or
analogue input) is disabled.
}
The servo amplifier applies speed-controlled braking with the preset braking ramp until
standstill is achieved, and disables the servo amplifier's power element.
}
When the set delay time has elapsed, the safety card activates the safety function STO.
The servo amplifier cannot be restarted.
SS1 Activate
STO Acknowledge
Setpoint value
Enable
}
SS1 Activate: Input for safety function SS1
}
STO Acknowledge: Output for feedback from safety function STO
}
Setpoint value: Specification of setpoint values
}
Enable: Servo amplifier's readiness for operation
SS2 when OPMODE = 0 ... 8
}
With the drive-activated safety function "safe stop 2" (SS2), the movement is ultimately
continued.
}
The status of the safety card (SS2 activated) is transmitted to the servo amplifier. As a
result, the information is available to a higher level control system (status word).
Operating Manual PMCprotego S2-2(-C)
1002529-EN-04
Braking ramp
v
t 1
STO delay time
1
0
1
0
1
Any
Braking ramp
0
1
0
STO
t 2
t
Any
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