Microscan MS-4X Instrukcja Użytkownika Pobierz pdf (Strona 56)

Protocol

3-6 MS-880 Industrial Long Range Scanner User’s Manual

3–Protocol

Multidrop

Note: See also “Multidrop Communications” on page A-38.

Note: Scanners linking up to a Microscan MS-5000 multidrop concentrator must be

configured in standard multidrop protocol.

User Defined Point-to-Point

User Defined Address

Definition: Multidrop allows up to 50 devices to be connected to a single RS-485

host, with the scanner assigned an unique address (from 01 to 50).

Usage: The MS-5000 can be used as a concentrator to a single host port con-

nection.

When Multidrop is selected, the protocol characters for RES, REQ, etc.

are assigned automatically.

Multidrop

Addresses:

Each address has its own separate poll and select address (from 1C to

7F hex).

Options: 01 through 50

Serial Cmd: If selecting Multidrop (K140,5) an address must be defined and

appended to the command string.

Format: <K140,5,address>

Definition: User Defined Point-to-Point allows the user to customize the point-

to-point protocol.

Usage: Useful for developing custom protocols in polled or unpolled mode.

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

Definition: User Defined is considered to be in a polled mode only if an address

has been assigned.

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

Default: No address

Options: Any ASCII character except a null.

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Microscan MS-4X Instrukcja Użytkownika Strona 56