Metrologic IS1000 Series, Installation And User Manual

Page: 24 / 44

IS1000 – Installation and User’s Guide
18
5.2. Host System Acknowledgment
The host acknowledges the frames sent by the IS1000 laser reader. This mode is only
available when using the RS232 interface.
The laser reader waits for acknowledgment from the radio base during time-out T1, whose
default value is 200 ms. If it does not receive the acknowledgment from the radio base, the
laser reader sounds a long low-pitched beep (transmission not OK).
Then the laser reader waits for acknowledgment from the host during time-out T2, whose
default value is 3 s. During this time-out, the operator cannot read another code. When it
receives the acknowledgment from the host, the laser reader sounds a short high-pitched
beep (transmission OK). If it does not receive the acknowledgment, the laser reader
sounds a long low-pitched beep (transmission not OK).
The radio base also waits for acknowledgment from the host during time-out T3, whose
default value is 2 s (this function is not yet implemented).
To configure this mode and timers, refer to the IS1000 Configuration Guide .
Since timer T3 is not implemented, the radio base waits indefinitely from the
acknowledgment from the host. While it is waiting, the radio base does not accept bar
codes. If the radio base does not receive the acknowledgment, check the cable and host
configuration.
Host ACK
Bar code
T3
Bar code
Base ACK
T1
T2
Host ACK
!
Note: