Siemens SINUMERIK 840C - Manual (Page 314)

09.95 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.2 Spindle-specific MD bits (spindle bits)
Bit 2=1 The control ignores multiple assignment of different spindles to the same
digital setpoint output on runup. The control checks cyclically that the spindles
do not access the setpoint output at the same time. If they do, reset alarm
2016, "Multiple assignment of connection" is triggered. This alarm cannot be
acknowledged until the rpm servo control has been removed of at least one of
the involved spindles by cancellation of the servo enable.
Note:
Multiple assignment of setpoints is only possible with digital setpoint values, the encoders must
not be SPC encoders.
Bit 1 (digital drives only)
Bit 1=0 Number of encoder periods between two reference marks is a multiple of 16.
Bit 1=1 Number of encoder periods between two reference marks is a multiple of 10.
Bit 0 Bit 0=0 The spindle actual value system is updated to the encoder zero marker signal.
Bit 0=1 (digital drives only)
The spindle actual value system is updated when the external zero marker
signal is received.
The external zero marker system (BERO proximity switch) must be connected
to the drive module.
Note:
The bits have an extended function in SW 4 and higher.
Bit 4 Bit 4=0 All parameter groups are switched over with the gear stage (active
immediately).
Bit 4=1 All parameter groups are switched over separately
Drive (DB 31, DR K+74, bit 0-2)
Position control (DB 31, DR K+xx, bit 0-2)
Transmission
(DB 31, DR K+yy, bit 3-5)
Bit 0 With digital and analog drive:
Bit 0=0 Spindle measuring system without external zero marker (BERO) (active
immediately).
Bit 0=1 Spindle measuring system with external zero marker (BERO) (active
immediately).
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–129
SINUMERIK 840C (IA)