Parameter Manual
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
299
Machine data
2.4 Axis-specific machine data
Description: The number of interpolation points required per measuring system must be
defined for the leadscrew error compensation.
The required number can be calculated as follows using the defined parame-
ters:
$AA_ENC_COMP_MAX - $AA_ENC_COMP_MIN
MD38000 $MA_MM_ENC_COMP_MAX_POINTS = ---------------------------------- + 1
$AA_ENC_COMP_STEP
$AA_ENC_COMP_MIN Initial position (system variable)
$AA_ENC_COMP_MAX End position (system variable)
$AA_ENC_COMP_STEP Distance between interpolation points (system variable)
When selecting the number of interpolation points and/or the distances
between them, it is important to take into account the size of the resulting
compensation table and the space required in the buffered NC user memory
(SRAM). 8 bytes are required for each compensation value (interpolation
point).
The index [n] has the following coding: [encoder no.]: 0 or 1
Special cases: Notice:
After any change in MD38000 $MA_MM_ENC_COMP_MAX_POINTS, the buffered NC user
memory is automatically re-allocated on system power-on.
All data in the buffered NC user memory are then lost (e.g. part programs,
tool offsets etc.). Alarm 6020 "Machine data changed - memory reallocated" is
output.
If reallocation of the NC user memory fails because the total memory capacity
available is insufficient, alarm 6000 "Memory allocation made with standard
machine data" is output.
In this case, the NC user memory division is allocated using the default val-
ues of the standard machine data.
References:
/FB/, S7, "Memory Configuration"
/DA/, "Diagnostics Guide"
Related to:
MD32700 $MA_ENC_COMP_ENABLE[n]LEC active
References:
/FB/, S7, "Memory Configuration"
38000 MM_ENC_COMP_MAX_POINTS A01, A09, A02 K3
- Number of intermediate points for interpol. compensation
(SRAM)
DWORD PowerOn
-
- 1 200 0 5000 7/0
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