Monitoring functions
Instruction handbook b maXX BM3000, BM3200, BM3300
Document no. 5.11018.11 Baumüller Nürnberg GmbH
174
of 218
10.2
Block monitoring This monitoring function checks the motor speed and the motor current.
If both of the following conditions are met for the period „block monitoring time“, then the
error/the warning „drive blocked“ is signaled to the controller and an immediate pulse in-
hibit takes place.
m Motor speed = 0
m The motor current output from the device is the same as the set motor limit current (cur-
rent limit).
Signal bus All power units at the axis devices are connected with a „signal bus“. Each user can re-
quest for and set the bus signals including the supply unit.
Signal bus - supply ready-for-use
Indicates, when the supply unit is in the status „ready-for-use“. This signal is generated
after the recognition and identification of the power supply. At a power rectifier „ready-for-
use“ is active after about 4 s after switching on the 24 V-supply voltage.
At power supply errors and power supply failure the ready-for-use signal is reset. The
axes must react upon this and must change into the error state.
Signal bus - ballast resistor on
The DC-link voltage is monitored independently by each axis. The mode parameter
(140.1) bit 0 sets, if the signal for the control of the ballast resistor shall be activated at
this warning. If the voltage of the ballast resistor drops below the ballast resistor threshold
(P130.29 protected) - 20 V (hysteresis) the axis resets the signal at the bus and deletes
the warning.
The ballast resistor threshold is calculated from max. U
DC-link
with:
Ballast resistor = max. U
DC-link
- 30 V
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