Rockwell-automation 2755 StrataSet Programming Software User Manual download pdf (Page 29)

2–18 Configuring your Reader

Publication 2755-6.14

RS232 Type Description

Data Format Odd

Select odd to make the parity bit either a 0 or 1, to guarantee

an odd number of ones.

Space Select space to make the parity bit always 0.

Even

Select even to make the parity bit either a 0 or 1, to guarantee

an even number of ones.

Mark Select mark to make the parity bit always 1.

None Select none and the parity bit time is skipped.

7 or 8 Data Bits

Select between 7 and 8 data bits per data byte, depending on

the requirements of your host.

1 or 2 Stop Bits

Select between 1 and 2 stop bits per data byte, depending on

the requirements of your host.

Note: The StrataScan line of Readers supports either 10 or 11 bit

data words. You cannot choose a data byte format that is not either

10 or 11 data bits total (including 1 start bit). For example, you

cannot select 7 data bits, 1 stop bit and no parity, since this would

constitute a 9-bit data byte. You cannot choose 8 data bits, 2 stop

bits and a parity bit, since this would constitute a 12-bit data byte,

including 1 start bit.

Further RS232 Options

RS232 Type Description

Options Reserved 1 This option is reserved for future use.

Reserved 2 This option is reserved for future use.

ACK/NAK

After a bar code is scanned and transmitted, if ACK/NAK is

enabled, the reader waits for one of several host character

commands to be sent from the host. If the host sends an ACK

(06H) acknowledge command, the reader beeps and resumes

scanning. If the reader receives a NAK (15H) negative

acknowledge command, the reader re-transmits the bar code

without a beep and does not resume scanning.

When this option is enabled, the reader transmits a Carriage

Return after each bar code.

When this option is enabled, the reader transmits a Line Feed

after each bar code.

DTR Support

When this option is enabled, the reader requires a Data

Terminal Ready (DTR) signal to be present before scanning.

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Rockwell-automation 2755 StrataSet Programming Software User Manual Page 29

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