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Chapter 3 Protocol

MS-880 Industrial Long Range Scanner User’s Manual 3-7

3–Protocol

User Defined Example

From Host

Definition: Example: ACK/NAK protocol can be configured using User Defined.

The scanner will transmit data to the host, when an ACK is received, it

will carry on with its business. If a NAK or response timeout occurs, the

scanner will re-send the data to the host up to 3 more times before

aborting.

Tip: To use User Defined Point-to-Point, first select Point-to-Point

<K140,0> and then User Defined <K140,6>.

Example: To select an unpolled ACK/NAK User Defined protocol with

LRC disabled, send <K140,0><K140,6,,,,,,,^F,^U><K145,0>. ACK

and NAK will be displayed in the menu.

Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>

Default: No assignment

Options: Any ASCII character except a null. Control characters can be used to

define RES through NAK in serial commands.

Definition: This option allows the handshaking protocol to be initiated from the

host, if not configured in an unpolled mode. Messages sent to the host

will include the scanner’s defined protocol. The status of From Host

determines if messages sent from the host to the scanner must include

the defined protocol. If From Host is disabled, the defined protocol is

not included. If From Host is enabled, the defined protocol must be

included.

Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>

Default: Disabled

Options: 0 = Disabled 1 = Enabled

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Microscan MS-4X Bedienungsanleitung Seite 57