Siemens SINUMERIK 840C Installation Instructions Manual page 265

Siemens computer drive installation instructions
Hide thumbs Also See for SINUMERIK 840C:
Table of Contents

Advertisement

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.5 Spindle-specific MD (spindle data)
478*-485*
Default value
2 000
Assignments
Gear
1
NC MD
478*
The control issues the ramp-form setpoints for acceleration and braking operations (ramp
function generator). The gradient of this ramp is determined by the acceleration time constant.
Notes
Two acceleration time constants are provided for each gear ratio:
Acceleration time constant without position controller
Acceleration time constant with position controller
The time constants without position controller are used for the open-loop control mode, the
time constants with position controller for the position mode.
MD 478* to 485* must be set such that the motor can follow the specified setpoints at any
one time without reaching the current limit. Particular care should be taken be taken that
this is also the case in the field weakening range.
The data in 478* to 485* should always be greater than the data in 419* to 426*.
You can set MD 419* to 426* so that the motor is accelerated to the current limit for a
certain time. If a ramp-up generator is built into the actuator, you can set MD 419* to 426*
to 0. In this case, the setpoint changes in steps on acceleration and deceleration.
Calculation of the permissible acceleration in position controlled spindle operation.
Speed
Maximum speed for position control mode
T
Development of spindle speed in controlled mode at the acceleration limit (M3/M4)
6–80
Acceleration time constant
with position controller gears 1-8
Lower input limit
Upper input limit
0
2
3
4
479*
480*
481*
©
Siemens AG 1992 All Rights Reserved
50 000
1 ms
5
6
7
482*
483*
484*
(MD 419* to 426*)
(MD 478* to 485*)
Time
6FC5197- AA50
SINUMERIK 840C (IA)
09.95
Active on
Power On
8
485*

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Simodrive 611-d

Table of Contents