Biss C Interface (Bml-S1G0-B; Troubleshooting; Eds - Balluff BML-S1G0-7-M5EG-0 Serie Manual De Instrucciones

BML-S1G0-_7_ _-M5EG-_0-_ _
Absolute magnetic encoder system
6
Interfaces (continued)
6.2 BiSS C interface
(BML-S1G0-B...)
The BiSS interface is described in the document
Interfaces for BML Magnetic Encoder System.
The document is part of this guide and must be
used.
The in- and outputs have the following data:
Signal Name in
name the
interface
document
+Clk
Input CLK
–Clk
+Data
Output Data
–Data
Tab. 6-5: In- and outputs
Resolution Inter-
[µm] polation
factor
0.9765625 2048
(1000/1024)
1 2000
2 1000
5 400
10 200
The max. speed for a digital A/B real-time interface is also limited by
1)
the edge separation.
Tab. 6-6: Relationship between the resolution, interpolation factor,
maximum speed and meaning of the bits
Interface data and meaning of the bits
are defined in Tab. 6-7 and Tab. 6-8.
Interface data
Bit number after CDS
Maximum measuring length [m]
Permissible Clk frequency [kHz]
Tab. 6-7: Interface data
20 english
Shown in Physical
interface layer
document
as high
+Clk > –Clk RS422
+Data > –Data RS422
Vmax Maximum
[m/s] measuring length
1)
[m]
32 bits
10 48
5 48
10 48
10 48
10 48
Value
40
48
0.1...10
Bit names
Null bits (always 0)
Position [incr]
(Bit35 (MSB), Bit8 (LSB))
Error (active low)
Warning (active low)
CRC
Tab. 6-8: Meaning of the bits in the data set
The counter polynomial for CRC determination is
0x43 (hex), 67 (dec) or 1000011 (bin).
6.2.1

Troubleshooting

Information on errors and warnings is available. The
magnetic encoder outputs a maximum of 8 errors and
8 warnings. Regardless of the interface, the 16 messages
are displayed through different colors (LED off, red, orange)
and LED flashing sequences (see section 8 on page 27).
In the following, errors and warnings are referred to as EW
events.
If the BML detects an EW event, it makes a note of it and
transmits it with the error/warning bit once during the next
data query. At the same time, an LED flashing sequence
(see section 8 on page 27) is started. This flashing
sequence is output at least once until the data query has
taken place.
If the EW event is present for a longer period of time
across multiple data queries, the corresponding bit is set
and the LED flashing sequence output during each data
query.
If multiple EW events occur successively, the flashing
sequence changes accordingly.
6.2.2

EDS

EDS, electronic data sheet, user area:
This BiSS C function allows the customer to permanently
store and read out, byte by byte, any customer-specific
data in the EEPROM user area of the sensor head via
register communication.
User range: 448 bytes (7 banks of 64 bytes each)
Bit number Number of
(after CDS) bits
Bits 39...36 4
Bits 35...8 28
Bit 7 1
Bit 6 1
Bits 5...0 6