Balluff BML SL1-ALZ1 ZZ-ABA S284/KA Series, Руководство пользователя, Страница: 48 / 144

18
6
BiSS C/SSI (BML SL1-ALZ1-B/S0ZZ-BA_ _-…)
For additional information about the interfaces
please refer to the document Interfaces for
BML Magnetic Encoder .
6.1 SSI interface
Data formats
Designation Posi-
tion
Error
(active
low)
Warning
(active
low)
CRC
Data length [bits] 24 1 1 6
Total data length [bits] 32
Tab. 6-1: Data format with error bit
For information about status indication and error
monitoring see Section 5.2 on page 16.
The maximum SSI clock frequency is 4 MHz.
6.2 BiSS interface
Data formats
Designation Posi-
tion
Error
(active
low)
Warning
(active
low)
CRC
Data length [bits] 24 1 1 6
Total data length [bits] 32
Tab. 6-2: Data format with error bit
In addition to the error and warning bit, transmission over
the BiSS interface is protected by a CRC. The status bits
are set according to the status (see Section 5.2 on
page 16).
Other BiSS interface properties
Maximum clock rate
10 MHz
Transmission type BiSS bidirectional
Device BiSS ID “ML1000”
Manufacturer BiSS ID
“BF”
EDS bank 5
Profile bank 6
BiSS profile BiSS BP3:
Standard Encoder Profile
Area for user data Ab Bank 14 (0xE)
CRC polynomial
0x43 (hex), 67 (dec),
1000011 (bin)
Tab. 6-3: BiSS properties
6.3 Preset input signal
The beginning of the magnetic tape does not represent the
measured position 0, but rather the zero point can be at
any desired position within or outside of the magnetic tape.
Crossing the zero point causes a position jump (overrun)
and the error bit is set. Therefore the appropriate
measuring range should be set before operating.
To set the measuring range the sensor head must be
moved to the start of the measuring range. The Preset
connection is connected to the power source for at least
20 ms. The current position is set to 10 mm ±1 mm.
Fig. 6-1:
Offset set
Overflow
Position value
Position value
Path
Path
Offset not set
8.19 m
8.19 m
Example for measuring range adjustment
The Preset connection is useful only for roughly setting the
start position. To set the position with greater accuracy the
Configuration Tool (see Section 9.5 on page 23) must be
used.
BML SL1-ALZ1- _ _ ZZ -ABA _ - S284/KA _ _
Absolute magnetic encoder system
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