User Manual

7–5Configuration: Scanner Control, Primary Match Table, Discrete I/O

Publication 2755-833

Inter-Scan Timer

Field Type Options

Edit 10 through 9999 or 0

Disables decoding for a set time interval after a valid read. The

default is 0, which disables the timer. The Inter-Scan Timer is valid

in both continuous and triggered modes of operations.

You can use the Inter-Scan Timer to:

• provide a delay between decodes to enable multiple labels, that

are not necessarily unique, to be read within the same package

• enable multiple decodes of the same label for verification

purposes

The Inter-Scan Timer accepts a value between 10 and 9999.

➀

Important: To ensure that package labels are read before the

No-Read Timer expires, set the Inter-Scan Timer to a value that is

less than the No-Read Timer setting.

A valid read starts the timer. See Figure 5.2. The decoder decodes a

scan within Field #1, which starts the Inter-Scan Timer and

immediately stops decoding. The decoder waits for the timer to

expire (or timeout) to resume decoding.

Use the following equations to create a delay between decodes:

W (cm or inches) x 1000 (msec/sec)

Line Speed (cm/sec or inches/sec)

Approximate Inter-Scan Timer Value (msec)=

Equation 1:

Equation 2: Maximum Inter-Scan Timer Value

S (cm or inches) x 1000 (msec/sec)

Line Speed (cm/sec or inches/sec)

Approximate Inter-Scan Timer Value (msec)=

Minimum Inter-Scan Timer Value

You may have to experiment with several settings since factors such

as label quality determine when the first read occurs.

➀ ATTENTION: Set output durations in multiples of 5 milliseconds. Actual output will have a worst-case precision

of +0 to –5 milliseconds, varying with the timing of the output. Durations that are not set in multiples of 5

milliseconds will be rounded up to the nearest multiple of 5 and function within the same +0 to –5 millisecond

precision.

For example, a setting of 25 milliseconds will result in a duration of from 20 to 25 milliseconds. A setting of 23

milliseconds will result in the same duration range.