5-14
Quadrus Verifier User’s Manual
RS-232 Auxiliary Port
Daisy Chain (Auxiliary Port Mode)
Usage:
Useful in applications where:
• More than one symbol type is present.
• A symbol may be present on multiple sides of a package.
• Symbols are presented at different depths.
Definition:
In a daisy chain application, readers are connected in tandem or “daisy
chain” and decoded data is relayed from one reader to another on up to the
host.
A master reader has its host port linked to the host computer and its auxiliary port
linked to the host port of the first secondary reader in the chain. Thereafter, each
secondary reader’s auxiliary port is linked to the host port of the secondary
reader that is further from the host in the daisy chain.
Each reader in the daisy chain can be assigned an ID that accompanies
any data that it sends.
Serial Cmd:
<
K101,aux port mode
,baud rate,parity,stop bits,data bits,daisy chain ID
status,daisy chain ID>
Options:
4 = Daisy chain
Function:
Before the master reader times out, it checks its auxiliary port for data. It
should be set to wait at least
30
mS for each secondary reader in the daisy
chain. If no data is received within the read cycle timeout, the master sends
a No Read message to the host. Otherwise the complete data is sent.
If for example the master reader is set to timeout in 120 mS, the first secondary
reader downstream might be set to 90 mS, the next to 30 mS, and so on, thus
assuring that at least 30 ms elapses between transmissions.
a
Daisy-chained readers can send a series of symbols by enabling
Multisymbol
and a common multisymbol separator. If the master reader does not receive
the expected number of symbols, No Read messages are appended to the
data string to make up the difference between the number of symbols enabled
in
Multisymbol
and the number of symbols read.
For example, a master and two secondary readers have
Number of Symbols
set to 3 and
Multisymbol Separator
defined as %. If the master and the first
secondary reader do not find symbols, but the next secondary reader registers
a good read, the transmitted results would be:
symbol data % No Read % No Read
a. The above example is based on the best case. Other factors such as baud rate, dynamic focus timing,
number of characters in a given symbol, and the number of secondary readers in the daisy chain can
affect timing and may need to be included in your calculations for complete accuracy.
Summary of Contents for Quadrus Verifier
Page 1: ...Quadrus Verifier User s Manual P N 83 006702 Rev C ...
Page 30: ...1 18 Quadrus Verifier User s Manual Generate and Save Verification Report ...
Page 150: ...4 10 Quadrus Verifier User s Manual UII Parsing ...
Page 152: ...Quadrus Verifier User s Manual ...
Page 178: ...5 26 Quadrus Verifier User s Manual Aux Port System Data Status ...
Page 210: ...6 32 Quadrus Verifier User s Manual Setting Up the Verifier for EZ Trax ...
Page 302: ...8 62 Quadrus Verifier User s Manual Configuring EZ Trax Output ...
Page 318: ...9 16 Quadrus Verifier User s Manual New Master Pin ...
Page 326: ...10 8 Quadrus Verifier User s Manual Service Message ...
Page 362: ...12 14 Quadrus Verifier User s Manual Request All Database Settings ...
Page 390: ...14 22 Quadrus Verifier User s Manual Status Requests ...
Page 404: ...15 14 Quadrus Verifier User s Manual Ordered Output Filter ...
Page 444: ...A 30 Quadrus Verifier User s Manual Glossary of Terms ...