Siemens SINUMERIK 840C Installation Instructions Manual page 315

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.2 Spindle-specific MD bits (spindle bits)
NC MD 7
Sign
Controller
inversion
output
setpoint
controls
523*
master/
master
slave
(as from
(as from
SW 4.4)
SW 4.4)
Active: On Power On
Bit 7 With bit 7 it is possible to take account of different ways in which the master
and slave drives might be connected to the common output without having to
change the polarity of the control and the direction of travel of the individual
drives (MD 5210 bit 1 and MD 5200 bit 1). This bit only has to be set if, given
a positive setpoint, the axes/spindles would rotate in opposite directions at the
mechanical coupling.
Bits 5 and 6 The output of the torque compensation controller is connected with bits 5 and
6. It can either affect the speed setpoint of the slave (bit 5 = 1 only), the
master (bit 6 = 1 only) or the master and slave (bits 5 and 6 = 1)
Bit 4 Bit 4=1 If bit 4 = 1, this axis is switched to slave operation immediately after Power
On (see Function description Master/Slave). This bit is therefore only active
after Power On. It is not longer possible to disable this function with a PLC
signal.
Bit 3 If bit 3 is set, a master or slave spindle which is also a following spindle is
switched over to position-controlled follow-up mode if errors occur in the
master/slave grouping (multidrive, gearbox interpolation). If no "Extended
stopping and retract" is active, switchover is also performed if errors occur in
the same mode group.
Note:
This function must not be used if the master spindle is simultaneously the
leading spindle for the slave (synchronous spindle), as then an unstable
control loop results.
Bit 0 Bit 0=1 Extended parameter switchover
Bit 0=0 Gear stage/parameter set change as for Software Versions 1 - 3.
This parameter switchover is only possible with the option bit.
NC MD 7
524*
Active: On POWER ON
Bits 0 to 3 Position control resolution for spindle
The measuring system resolution chosen is matched to the rotary encoder
using the NC machine data MD 455* and 456*.
The coding of the possible measuring system resolutions can be taken from
the table giving the position control resolution of the rotary axes (see MD
1800* bit 0 to 3).
6–130
Bit No.
6 5 4
Controller Master-
output slave oper-
controls ation after
slave Power On
(as from (as from
SW 4.4) SW 4.4)
Bit No.
6 5 4
©
Siemens AG 1992 All Rights Reserved
3 2 1
Position-
controlled
follow-up if
error occurs
(as from
SW 5)
3 2 1
Position control resolution
SINUMERIK 840C (IA)
09.95
0
Extended
para. set
switchover
(as from
SW 4)
0
6FC5197- AA50