Machine data
2.4 Axis-specific machine data
Parameter Manual
256
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Description:
Number of encoder revolutions a rotary absolute encoder is able to resolve
(see also the maximum multiturn information of the absolute encoder, see
encoder data sheet or PROFIdrive parameter P979).
The absolute position of a rotary axis is reduced to this resolvable range
when an absolute encoder is switched on:
In other words, a MODULO transformation takes place if the actual position
sensed is larger than the position permitted by MD ENC_ABS_TURNS_MODULO.
0 degrees <= position <= n*360 degrees (with n = ENC_ABS_TURNS_MODULO)
Note:
With SW 2.2, the position is reduced to this range when the control/encoder
is switched on. With SW 3.6 and higher, half of this value represents the
maximum permissible travel distance with the control swiched off/the encoder
inactive.
Special cases:
For PROFIdrive, any integer value is permissible.
The MD is relevant only for rotary encoders (on linear and rotary axes).
Corresponds to:
PROFIdrive parameter P979
Description: The encoder serial number (EnDat encoders) can be read out here.
It is updated at PowerOn or when parking is deselected.
"0" is supplied for encoders which do not have a serial number available.
Manipulating this MD normally causes automatic absolute encoder maladjustment
(MD34200 $MA_ENC_REFP_MODE returns to "0").
34220 ENC_ABS_TURNS_MODULO A03, A02 R1
- Modulo range for rotary absolute encoder DWORD PowerOn
-
808d-me42 1 4096, 4096 1 100000 -1/2
808d-me62 1 4096, 4096 1 100000 1/1
808d-te42 1 4096, 4096 1 100000 -1/2
808d-te62 1 4096, 4096 1 100000 1/1
34230 ENC_SERIAL_NUMBER A02 R1
- Encoder serial number DWORD PowerOn
-
808d-me42 1 0, 0 - - 0/0
808d-me62 1 0, 0 - - 1/1
808d-te42 1 0, 0 - - 0/0
808d-te62 1 0, 0 - - 1/1
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