Siemens SINUMERIK 840C - Manual (Page 530)

07.97 7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Motor rated speed 1400
Default value Lower input value Upper input value Units
1 450.0 0.0
25 000.0
50 000.0 (as from
SW 6)
rev/min
Active on
Power On
Input of motor rated speed as specified on the motor data sheet (non-Siemens motor) or
automatic parameterization using machine data "Motor code number" (MD 1102).
Max. motor operational speed 1401
Default value Lower input value Upper input value Units
0.0 0.0 50 000.0 rev/min
Active on
Power On
Machine data MD 1401 defines the maximum operational speed of the motor. It is used as a
reference value for the speed setpoint interface and for the machine data "Monitoring speed
motor" (MD 1405). The default values are calculated by means of Calculate controller data
for feed drives on the basis of the motor rated speed according to the motor data sheet and on
the basis of the maximum speed for main spindle drives.
Note:
The velocity of a feed axis is matched with NC MD 2560 (maximum axis velocity). The motor
speed which corresponds to this maximum value must be entered in drive-MD 1401.
Allowance is made for the spindle pitch plus any existing gear ratios, etc. in the relationship
between NC MD 2560 and drive MD 1401.
Creep speed pulse suppression 1403
Default value Lower input value Upper input value Units
0.0/2.0 0.0 7 200.0 rev/min
Active
at once
Input of creep speed for pulse suppression. If the absolute speed actual value drops below the
specified speed limit, e.g. owing to cancellation of the controller enabling command, in the
course of a creep operation, the pulses are suppressed by a software function and the drive
shut down until it is re-enabled by SERVO. If the controller enabling command has been
cancelled before the time set in machine data "Timer pulse suppression" (MD 1404) has
elapsed, the pulses are suppressed even if the speed has not dropped below the threshold
value. The default setting is dependent on the motor type (FDD ˆ
=0, MSD ˆ =2) and is
parameterized by the drive configuration during start-up. The default value 0 means that the
machine data is deactivated; pulse suppression is then implemented solely via the machine
data "Timer pulse suppression" (MD 1404).
The functionality of this machine data is required if overshoot must be prevented when zero
speed is reached after cancellation of the controller enabling command.
Note:
Under normal circumstances, shutdown is implemented sequentially on the drive and servo
sides with variously adjustable timers (NC MD 156, NC MD 12240) and, in the event of a fault,
only on the drive side with timer MD 1404.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 7–115
SINUMERIK 840C (IA)