Chapter
10
Operating Instructions
CLV 42x bar code scanner
10-26
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 009 981/O078/16-08-2004
Appendix
10.9
Special applications and procedures
10.9.1
Triggering the teach-in match code 1 via the "Sensor 2" switching input
In Reading mode, the CLV compares up to two match codes with the bar codes it recorded
in the reading pulse. The result status of the code comparison is signaled by the
corresponding functional assignment via the "Result 1" and "Result 2" (“Result“ LED)
switching outputs and the beeper. The match codes can also be used as output filters for
the host interface. In this case, when a good read occurs, the CLV only outputs those bar
codes that have the same code type, code length, and data content as the match code(s).
A match code can contain max. 50 characters in the range 32 to 137 dec. and must be a
code type that can be evaluated by the CLV.
Using the "Sensor 2" switching input, the CLV can:
•
teach in match code 1 via its optical interface (reading window) and store it permanently
in the parameter set instead of entering it with the CLV Setup program. The code type,
code length, and data content are entered in the parameter set.
•
activate the code comparison. The status remains active until the power supply to the
CLV is switched off.
Before the match code can be read, a switch must be connected (
), the functional
assignment of the switching input changed and Teach-in mode selected.
There are two modes for teaching in match code 1:
•
Dynamic teach-in of match code 1
The code type that corresponds to the match code must be activated for the evaluation
in the CLV. The CLV must be pulsed manually so that it can read the match code. After
the teach-in procedure has been successfully completed, the CLV still continues to
output bar codes of all the code types that were previously enabled.
•
Static teach-in of match code 1 with/without Pharmacode
The CLV can also read a match code whose code type is implemented, but not yet
enabled for evaluation. A reading pulse starts automatically at the start of the teach-in
procedure. The CLV terminates the reading pulse once the teach-in procedure has
been successfully completed. In Reading mode, it only outputs bar codes which match
the code type and length of match code 1. All other code types are locked. To ensure
that the match code is read reliably, the CLV temporarily sets the number of multiple
reads to 30. The previous code configuration is kept if a match code is not detected
during the teach-in procedure.
Fig. 10-11: "Sensor 2" configuration for triggering the teach-in match code 1
CLV 42x
Switch S
V
S
= +10 to +30 V DC
*)U
imax
= 28 V!
