Siemens SINUMERIK 840D Description Of Functions page 471

11.03
8.
9.
10. Finally, if the JOG/REF machine mode is active on the MMC, the "user
Replacing a motor with The same conditions apply as when replacing a motor with absolute value
encoder – these are described first.
incremental encoder
To calibrate the encoder, a reference point approach has been set up, e.g. with
reference point cams, i.e. after the zero mark has been passed when leaving
the cam, the reference point is approached according to the offsets in 34080
REFP_MOVE_DIST and 34090 REFP_MOVE_DIST_CORR - and the value of
the reference point is set in MD 34100: REFP_SET_POS. After the referencing
operation, Alarm messages 27000/300950 "Axis not safely referenced"
disappear and the functions "Safe limit positions" and "Safe cams" are safely
active.
The important factor when replacing a motor (also without Safety Integrated) is
that a defined position reference can be established with respect to the
mechanical parts of the machine. This can be achieved by mounting and
removing the motor at a defined mechanical position or appropriately re-
calibrating after the motor has been replaced.
After the old motor has been removed and the new motor installed, the
following procedure is recommended:
1.
Re-calibration
procedure
2.
3.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
The axis does not traverse. Instead, the offset between the correct actual
value (reference position) and the actual value supplied by the encoder is
entered in MD 34090: REFP_MOVE_DIST_CORR. The current actual
value appears in the basic display and the axis signals "referenced". The
value 2 is entered in MD 34210 as the result.
Example:
MD 34010 = 1 (minus) and the reference position was approached in the
minus (negative) direction. Then, the "-" key must also be pressed on the
machine control panel.
When the absolute value encoder has been re-calibrated (MD 34210 from
1 -> 2), the axis changes over into the "referenced" state. At this time, the
new valid actual position is taken over for the safe actual values (axis and
drive).
agreement" softkey must be pressed and the user agreement for the axis
involved must be reset. Alarms 27000/300950 disappear and the functions
"Safe limit positions" and "Safe cams" are safely active again
Run-up the control or carry-out an NCK reset
If the JOG/REF machine mode is active on the MMC, the "user agreement"
softkey must be pressed and the user agreement for the axis involved is
withdrawn to avoid Alarm 27001 Axis <name of the axis> fault in a
monitoring channel,
Code 1003, values: NCK 0, drive 0
After the system has run-up, the JOG/REF mode is selected and the feed
enable for the axis is issued. Carry-out a reference point approach for the
axis involved.
8 Application examples
8.7 Replacing a motor or encoder
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