Pilz PMCprotego D.48 Operating Manual page 80

Function Description
*) please refer also to the ASCII object reference in the commissioning software's online
help
Behaviour during a power failure
The servo amplifier detects the failure of one or more input phases.
The behaviour of the servo amplifier is set using the commissioning software: In the "Basic
Setup" window, under "Response to Loss of Input Phase", select (PMODE):
}
A warning appears if the higher level control system is intended to bring the drive to a
standstill:
A message indicates that an input phase is missing (message "n05") and the motor cur-
rent is limited to 4 A. The servo amplifier is not switched off. The higher level control
system can now either end the current cycle specifically or bring the drive to a standstill.
The error message "NETZ-BTB, F16", for example, is sent to a digital output on the
servo amplifier and is evaluated by the control system.
} An error message appears if the servo amplifier is intended to bring the drive to a
standstill:
A missing input phase is registered as an error (error message "F-19"). The servo
amplifier is switched off; the BTB relay contact for operational readiness opens. If the
factory default setting is unchanged (ACTFAULT=1), the motor is braked using the set
emergency braking ramp.
Behaviour when the undervoltage threshold is reached
The value of the undervoltage threshold will depend on the type of servo amplifier. If the ac-
tual value drops below the undervoltage threshold in the intermediate circuit, error
"F05" (undervoltage) is displayed. The reaction of the drive depends on the setting made
for the parameters ACTFAULT and STOPMODE.
Behaviour when the "holding brake" function is enabled
Servo amplifiers on which the "holding brake" function has been enabled have a separate
procedure to switch off the inverted rectifier. The removal of the ENABLE signal initiates
electrical braking.
A potential malfunction of the holding brake must be consdiered. Bringing a motor to a
standstill safely using the holding brake requires an additional electromechanical N/O con-
tact for the holding device and a suppression device for the brake.
Behaviour of the safety function STO
The safety function STO activates the pulse disabler on the servo amplifier and removes
the power to the motor.
Operating Manual PMCprotego D.48, PMCprotego D.72
1001735-EN-04
80