Siemens SIMOVERT MASTERDRIVES Manual page 395

Communication / PROFIBUS
Gx_STW
Encoder x-control word
Bit Value Meaning
0 1 Functions:
1 1 Reference marks
2 1 Search
3 1 or
flying
measurement
4-6 1-3
7 0 / 1
8
9
10
Reference point
11 0 / 1
mode
12 1 Request to set /
shift reference
point
13 1 Request absolute
value cyclically
8.2-108
x: Place-marker for encoder 1or 2 to control the encoder
functionality
Comments
Function 1-4:
Request reference marks search (Bit 7 = 0)
Bit 0: Function 1 (Reference mark 1)
Bit 1: Function 2 (Reference mark 2)
Bit 2: Function 3 (Reference mark 3)
Bit 3: Function 4 (Reference mark 4)
Request flying measurement (Bit 7 = 1)
Bit 0: Function 1 (Scanner 1 pos. edge)
Bit 1: Function 2 (Scanner 1 neg. edge)
Bit 2: Function 3 (Scanner 2 pos. edge)
Bit 3: Function 4 (Scanner 2 neg. edge)
Command:
0: ----
1: Activate function x
2: Read value x
3: Terminate function x
4-7: reserved
Mode:
Bit 7 = 0: Reference marks search (zero mark or zero mark and
BERO)
Bit 7 = 1: Flying measurement (only BERO)
reserved
reserved
reserved
Reference point mode:
Bit 11 = 0: Set reference point
Bit 11 = 1: Shift reference point
Request to set/shift reference point.
The setting or shift value can be adjusted according to the device.
Consideration in Gx_XIST1, Gx_XIST2
Request for additional cyclical transmission of the absolute position
actual value in Gx_XIST2.
Use e.g. for:
Compendium Motion Control
Bit 4=1
Bit 5=1
Bit4 and Bit5 =1
- additional measuring system monitoring
- synchronization in run-up
6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
05.2006
Siemens AG