Parameter Manual
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
291
Machine data
2.4 Axis-specific machine data
Description: Only for special analog and hydraulic drives (not active with PROFIdrive
drives):
The value entered in MD36720 $MA_DRIFT_VALUE is always added as an offset to
the manipulated variable. Whereas automatic drift compensation is active only
for position-controlled axes, this machine data is always active.
Special case: the following applies to PROFIdrive drives:
This MD can also be used for "simple" drives that have drift problems due to
drive-internal implementation as analog drives. To avoid erroneous settings,
this static drift compensation only becomes active with PROFIdrive if MD32250
$MA_RATED_OUTVAL != 0 (i.e. the MD has no effect in the case of automatic
interface adjustment between the NC and the drive).
Note:
Drift compensation must not be active if the DSC function (MD32640
$MA_STIFFNESS_CONTROL_ENABLE=1) is being used, otherwise unexpected speed
oscillations will occur when DSC is enabled/disabled.
Standardization: The input value is related to the corresponding interface
standardization in
MD32250 $MA_RATED_OUTVAL,
MD32260 $MA_RATED_VELO, and
MD36210 $MA_CTRLOUT_LIMIT.
Description: MD36730 $MA_DRIVE_SIGNAL_TRACKING = 1 activates the acquisition of the fol-
lowing drive actual values (if they are made available by the drive):
• $AA_LOAD Drive load
• $AA_POWER Drive active power
• $AA_TORQUE Drive torque setpoint
• $AA_CURR Smoothed current setpoint (q-axis current) of drive
MD36730 $MA_DRIVE_SIGNAL_TRACKING = 2 activates the acquisition of the fol-
lowing drive actual values:
With PROFIdrive, it must be ensured that the stated values are also transmit-
ted in the drive actual message frame (provide sufficient message frame
length on the bus, assign the values to the message frame content in the
drive, e.g. use message frame 116).
• $VA_DP_ACT_TEL shows actual value message frame words
Note: Values 3 and 4 are reserved
Note: The value range of MD36730 $MA_DRIVE_SIGNAL_TRACKING can be restricted
because of reduced functions of control systems
36720 DRIFT_VALUE EXP, A07, A09 -
% Basic drift value DOUBLE NEW CONF
-
- 1 0.0 -1e15 1e15 1/1
36730 DRIVE_SIGNAL_TRACKING A10 B3
- Acquisition of additional drive actual values BYTE PowerOn
-
808d-me42 - 0 0 4 0/0
808d-me62 - 1 0 1 1/1
808d-te42 - 0 0 4 0/0
808d-te62 - 1 0 1 1/1
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