Siemens SINUMERIK 808D ADVANCED Parameter Manual page 213

30270 ENC_ABS_BUFFERING
- Absolute encoder: Traversing range extension
-
808d-me42 1
808d-me62 1
808d-te42 1
808d-te62 1
808d-mte40 1
808d-mte60 1
Description:
This MD defines the way in which the absolute encoder position is buffered, and whether
a traversing range extension is active on software side (exceeding the limits of the
absolute value encoder range that can be displayed on the hardware).
"0" = standard = traversing range extension (compare ACT_POS_ABS) is active.
"1" = traversing range extension on software side is inactive.
When using an absolute linear scale, there will not be a traversing range overflow for
mechanical reasons. This MD is therefore only valid for rotary absolute value encoders.
For rotary absolute value encoders, the traversing range that can be clearly displayed
on the encoder side, is stored in MD34220 $MA_ENC_ABS_TURNS_MODULO. You can do without
a traversing range extension without any problems (a hardware counter overflow that
might be within the traversing range is concealed in the software via shortest-path
decision):
a.
side is smaller than the traversing range on the load side that corresponds to MD34220
$MA_ENC_ABS_TURNS_MODULO.
b.
is connected on the load side (no gear to be considered) or if "without remainder" can
be calculated:
Number of rotations on the load side = ENC_ABS_TURNS_MODULO * gear ratio
(Example: ENC_ABS_TURNS_MODULO = 4096 encoder rotations, gear 25:32, i.e. number of
rotations on load side = 4096*(25/32)=3200).
Notice:
If you do not meet the conditions under a. or b., you run the risk of getting a wrong
absolute encoder position at next Power ON or encoder activation after parking without
prewarning if the traversing range extension is not working. Therefore, the traversing
range extension remains active in the standard version.
Related to:
MD30240 $MA_ENC_TYPE
MD30300 $MA_IS_ROT_AX
MD30310 $MA_ROT_IS_MODULO
MD30250 $MA_ACT_POS_ABS
MD34220 $MA_ENC_ABS_TURNS_MODULO
MD34090 $MA_REFP_MOVE_DIST_CORR
30300 IS_ROT_AX
- Rotary axis / spindle
SCAL, CTEQ
808d-me42 -
808d-me62 -
Parameter Manual
Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
0, 0
0, 0
0, 0
0, 0
0, 0
0, 0
in linear axes or limited rotary axes, if the actual traversing range on the load
in endlessly turning rotary axes (ROT_IS_MODULO = TRUE), if the absolute encoder
FALSE, FALSE,
FALSE, TRUE
FALSE, FALSE,
FALSE, TRUE, TRUE
EXP, A01, A02
BYTE
0 1
0 1
0 1
0 1
0 1
0 1
A01, A06, A11
BOOLEAN
0 -
0 -
Machine data
3.4 Axis-specific machine data
R1
PowerOn
0/0
0/0
0/0
0/0
7/2
7/2
G1, K3, R2, T1, G2, K2, R1, S1,
V1
PowerOn
1/1
1/1
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