Siemens SINUMERIK 840C Installation Instructions Manual page 378

07.97
Bit 3 "Suppression of acceleration limitation"
Bit 3=1 "Acceleration limitation not active"
With LINK ACTIVE, the acceleration of the following axis is not limited by
the control but is output directly, as determined by leading spindle. If MD
value 1768* is exceeded, no alarm is triggered.
Bit 3=0 "Acceleration limitation active"
With LINK ACTIVE, the acceleration of the following axis is limited to the
acceleration value set in the machine data (MD 1768*).
Note:
The limitation remains active until the synchronous speed or zero speed is
reached:
• On runup after switching on the link
• When switching from link factor
• When stopping the spindle by switching off the link
Bit 2 "Block change with synchronism fine"
Bit 2=1 After an overlaid movement, block change is triggered in the NC, as soon
as the following axis has reached "Synchronism fine" and all the partial
setpoints of the block have been output.
Bit 2=0 Block change is triggered when the synchronism speed has been reached
and all partial setpoints of the block have been output.
V
FA
T delay (derived from the time
delay
constant of the parallel model)
Block change with synchronism fine. Motor operating without disturbance. Behaviour corresponds to parallel
model.
Following axis/spindle-specific machine data bits
NC MD 7
1852*
©
Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
Partial setpoint
Partial actual value
Bit No.
6 5 4
Include
Include tool
program-
length
med ZO
comp.
G58...G59
6FC5197- AA50
6.7.1 Axis-specific MD bits 2 (axial bits 2)
Synchronism fine window
t
T
delay
Block change on 1 signal
Block change on 0 signal
3 2 1
Include Include
Include
settable ZO DRF and
external ZO
G54...G57 preset
0
Ref. system
GI positions
6–193