Eds - Balluff BML Información Básica

Interfaces for BML Magnetic Encoder System
2
Interfaces (continued)
2.3.2

EDS

EDS, electronic data sheet, user area:
This BiSS C function allows the customer to permanently
store and/or read out, byte by byte, any user-specific data
in the EEPROM user area of the sensor via register
communication.
The entire EEPROM address space is divided into three
areas:
Hidden
–
The user has no access.
– Read Only (EDS area)
This area is read-only. This area contains the
Electronical Datasheet (EDS) stored on the device. It
provides device information about the communication
parameters and the active device profile of the sensor.
The device profile contains information about the
measurement properties. In general the following
properties can be read out:
– Type of sensor
– Accuracy of the sensor
– Length and meaning of the process data
– Timing requirements
– Limit value requirements for the voltage supply.
– Read/Write (user area)
Here a certain number of bytes are available in
individual banks of 64 bytes each (see user's guide for
sensor). Mechanical assembly data for the sensor
head, the assembly date, order designation for the
sensor, etc. can be stored here.
Additional information about the individual
profiles can be found at
http://biss-interface.com.
www.balluff.com
The BiSS register address space (0x00...0x7F) is divided
into two areas:
1. A selectable bank range (0x00...0x3F), which
depending on the selected bank maps various
EEPROM ranges.
Fig. 2-8 shows the relationship between BiSS-C
register address space and EEPROM address space.
The currently visible EEPROM address range can be
selected by the bank at BiSS-C register address 0x40.
The contents of the selected bank is mapped in
register address range 0x00...0x3F.
Depending on the bank either no access, read-only
access or read/write access is possible.
2. A fixed area which is always accessible in write and
read mode (0x40 to 0x7F). This area can be used to
select the bank that is to be edited.
The following information can be read out:
– Sensor warnings and errors
– Bank at which the electronical data sheet begins
– Currently selected bank
Bank n
Bank 2
Bank 1
Adr
Bank 0
0x00
0x3F
0x40
selects
Bank sel
0x41
EDS bank
0x48
Error byte
0x49
Warning byte
0x78
BiSS identifier
0x7F
BiSS C register address space
Fig. 2-8: BiSS C register address space
Bank 0
Bank 1
Bank 2
Bank n
EEPROM address
space
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