Omron V550-A20, Operation Manual

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V550-A20 Operation Manual
Section 3-
11
Connecting Your V550-A20 To An External Device
The V550-A20 has two parallel outputs; NVC/NO MATCH and
GO/MATCH. These output timers are activated or deactivated from
pin 4 and pin 5 respectively on the V550-A20 15 pin connector. Both
of these outputs are controlled by software. (Refer to your BCSETUP
Manual.)
You can use these outputs to have a beeper sound when you receive a
no read or no match (when used as a verifier), or you could have a
light turn on every time there is a go (good read) or match (when
used as a verifier). There are many other uses for these outputs.
How The Outputs Work
The names of the two outputs directly reflect their purpose. The
NVC/NO MATCH output changes its electrical state dependent on
receiving a no read or a no match (while in verifier mode). The
GO/MATCH output timer changes its electrical state dependent on
receiving a good bar code or a match (while in verifier mode).
These outputs are open collectors. When the signal is low, it causes
the state of the output to remain unchanged. When the signal is high,
it causes the state of the output to change. For example, if you set the
NVC/NO MATCH timer for 150 milliseconds, every time the scanner
sees a non valid bar code the NVC/NO MATCH timer signal remains
high until that 150 millisecond time period is complete.
Using V550-A20
Parallel Outputs
The Go/Match (out 1)
output can not be
enabled when RTS/CTS
protocol is enabled.
(Refer to your BCSETUP
Manual.)