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7. The read/write head in the AS-i network
Basic setting
Addressing
The read/write head is addressed using an addressing unit (e.g. AC1144), the mas-
ter or the AS-i software of the host (the components must support the AS-i version
2.1).
Assign an address between 1 and 31.
Analogue value representation
For the AS-interface the read/write head is a slave having an analogue input with
the transmission protocol to the profile 7.4. If the master operates to the master
profile M3 or M4, it automatically detects the read/write head and supports the
profile 7.4.
For the analogue value transmission the profiles 7.3 and 7.4 are identical.
You can find the manual with details about the AS-i services to the profile 7.4 on
our website at:
➔
Data sheet direct
➔
DTA100
➔
Additional Data
Assignment of the data bits
In one transmission cycle the following data are transferred in data triples.
Additional information bits:
O = overflow bit (is set for the values 7FFF and 8000 hex, otherwise 0)
V = valid bit (is set for a valid value)
www.ifm-electronic.com
READ
/
WRITE HEAD FOR RF IDENTICFICATION SYSTEMS
DTA100
15
ENGLISH
Parameters
Values
I/O code [hex]
7
ID code [hex]
4
Extended ID2 code [hex]
C
ID1 code for coded value [hex]
F
Slave address (factory setting)
0
E3 E2 E1
D1 6 D1 5 D1 4 D1 3 D1 2 D1 1
D1 0 D9 D8 D7 D6 D5 D4 D3 D2 D1
O
V
Extention
Bits
(statisch 0)
User Data Bits
user data bits
extension
bits
(static 0)