Unipolar Spindle - Siemens SINUMERIK 802C base line Technical Manual

6.3

Unipolar spindle

Configuring
Special features
SINUMERIK 802C base line
Start-Up
A spindle that requires not a positive voltage of +/-10 volts, but a positive
voltage and separate binary sign signals for controlling is called unipolar
spindle. The voltage is output via the analog spindle setpoint output, and the
sign signals via binary outputs.
The 802SC base line is able to run a unipolar spindle.
The "Unipolar spindle" mode is set via the axis machine data
MD 30134 IS_UNIPOLAR_OUTPUT of the spindle. There are 2 different
modes for controlling the unipolar spindle.
MD input value "0":
z
Bipolar setpoint output with positive/negative voltage
The PLC output bits O0 and O1 may be used by the PLC.
MD input value "1":
z
Unipolar setpoint output with positive voltage
The PLC output bits O0 and O1 must not be used by the PLC.
PLC output bit O0 = servo enable
PLC output bit O1 = negative direction of travel
MD input value "2":
z
Unipolar setpoint output with positive voltage
The PLC output bits O0 and O1 must not be used by the PLC.
PLC output bit O0 = servo enable positive direction of travel
PLC output bit O1 = servo enable negative direction of travel
1. The spindle must be the 4th axis.
2. The binary outputs used for the unipolar spindle must not be used by the
PLC. This must be guaranteed by the user, as they are not any
monitoring functions in the control system. Not observing this fact will
result in undesired reactions of the control system.
Technical Appendix
6-37