09.2008 Communication / PROFIBUS
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES Compendium Motion Control 8.2-111
Encoder x-status word:
x: place marker for encoder 1 or 2
-> to indicate statuses, acknowledgements, errors, etc.
Bit Value Meaning Comments
0
1
2
3
1
1
1
1
Status: Function 1-4 active (Reference marks search / Flying measurement)
Bit 0: Function 1 (Reference mark 1 / Scanner 1 pos. edge)
Bit 1: Function 2 (Reference mark 2 / Scanner 1 neg. edge)
Bit 2: Function 3 (Reference mark 3 / Scanner 2 pos. edge)
Bit 3: Function 4 (Reference mark 4 / Scanner 2 neg. edge)
Simultaneous setting of Bit 4-7
-> Terminate function 1-4 (device-specific error code in Gx_XIST2)
4
5
6
7
1
1
1
1
Functions:
Reference marks –
search
or
Flying measurement
Status: Value 1-4 present (Reference mark / scanner)
Bit 4: value 1 (Reference mark 1 / scanner 1 pos. edge)
Bit 5: value 2 (Reference mark 2 / scanner 1 neg. edge)
Bit 6: value 3 (Reference mark 3 / scanner 2 pos. edge)
Bit 7: value 4 (Reference mark 4 / scanner 2 neg. edge)
Simultaneous setting of Bit 0-3
-> Terminate function 1-4 (device-specific error code in Gx_XIST2)
8 1
Scanner 1
deflected
Static status scanner 1 (U923.5)
9 1
Scanner 2
deflected
Static status scanner 2 (U923.6)
10 reserved, set to zero
11 encoder error acknowledgement in processing
12 1
Set/shift reference
point executed
Acknowledgement for “Request set / shift reference point”
Gx_STW, Bit 11, 12).
Consideration at Gx_XIST1, Gx_XIST2
13 1
Transmit absolute
value cyclically
Acknowledgement for "Request absolute value cyclically" (Gx_STW, Bit 13).
Cyclical transmission of the absolute actual position value in Gx_XIST2.
14 1
Parking encoder
active
Acknowledgement for "Activate parking encoder" (Gx_STW, Bit 14).
15 1 Encoder error
Indicates an error of the encoder or the actual value recording. A device-
specific error code is in Gx_XIST2. If several errors occur, the first one is
displayed.
Table 8.2-18 Encoder status word
Encoder status word
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