Siemens SINUMERIK 840D Simodrive 611 digital Startup Manual page 68

6 Programming the control
6.6 System data
Internal physical
variables
Physical variables
for input/output
6-68
It is also possible to switch the scaling system via MD 10260.
Requirement:
S
Set MD 10260: CONVERT_SCALING_SYSTEM=1
S
Bit 0 of MD 20110: RESET_MODE_MASK is set in each channel
S
Automatic conversion of NCK active data when the scaling system is
changed.
S
Data backup with detection of current system of units.
S
Effect of MD 10240: SCALING_SYSTEM_IS_METRIC is reset.
S
Configuring of the scaling system for sag compensation via MD 32711:
CEC_SCALING_SYSTEM_METRIC.
The programmed basic settings can be changed over (G70, G71, G700, G710)
for specific channels in MD 20150: GCODE_RESET_VALUES [12]. If the soft
key is used to change via the HMI, the value toggles between G700 (inch) and
G710 (metric).
With G700/G710, additional feeds (inch/min or mm/min) are interpreted in the
scaling system, in addition to the specified lengths.
The physical variables in the machine data are set to the following units by
default:
Bit no./Physical variable
0 Linear position
1 Angular position
2 Linear velocity
3 Angular velocity
4 Linear acceleration
5 Angular acceleration
6 Linear jerk
7 Angular jerk
8 Time
9 Position controller loop gain
10 Feedrate per revolution
11 Linear position (correction value)
12 Angular position (correction value)
13 Cutting speed
The physical variables for the input/output of machine and setting data may be
defined across the system via
MD10220: SCALING_USER_DEF_MASK (activates the scaling factors) and
MD 10230: SCALING_FACTORS_USER_DEF (scaling factors for the physical
variables).
If the corresponding activation bit is not set in MD 10220, then the scaling takes
place internally with the conversion factors listed below (default setting,
exception K factor).
V
If all the bits are set in MD 10220 and the default setting is to be retained, then
the following scaling factors must be entered in MD 10230.
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
metric inch
1 mm 1 inch
1 degree 1 degree
1 mm/min 1 inch/min
1 rpm 1 rpm
2 2
1 m/s 1 inch/s
2 2
1 rev./s 1 rev./s
3 3
1 m/s 1 inch/s
3 3
1 rev./s 1 rev./s
1 s 1 s
1/s 1/s
1 mm/rev. 1 inch/rev.
1 mm 1 degree
1 degree 1 degree
1 m/min 1 foot/min
© Siemens AG 2006 All Rights Reserved
03/2006