Datalogic Star Bedienungsanleitung PDF herunterladen (Seite 46)

STARModem™

• If Modem 1 - Transmission Mode = 2 ways

ACK/NACK from Remote Host = enabled

FIFO = enabled

Handshaking = any

Single Store = enabled

The Client, (Host 1) sends a message to the Remote Host (Host 2) and expects

an answer from Host 2. Host 2 answers with DATA (a string of up to 238

characters). If Modem 2 sends this DATA answer within the Radio Protocol

Timeout, Modem 1 sends it to its local Host (Host 1), otherwise Modem 1 sends

NACK. In addition, the Single Store parameter upon Radio Protocol timeout,

causes Modem 1 to retry transmission of the same message the defined number

of times, before responding to its local Host (Host 1) with NACK.

Host 1 - Handshaking = RTS/CTS

• If Modem 1 - Transmission Mode = any

ACK/NACK from Remote Host = enabled

FIFO = disabled

Handshaking = Modem (RTS/CTS)

The Client, (Host 1) sends a message to the Remote Host (Host 2). Modem 1

after receiving the message, blocks transmission of Host 1 until communication

is completed according to the other communication control parameter settings as

described above.

NOTE

The most secure settings for bi-directional communication in

STAR-System™ Mode is to have ACK/NACK from Remote Host

enabled and Two-way transmission at both ends. In addition, in case

the first transmission fails, the Single Store parameter automatically

repeats transmission of the same data packet up to the number of

specified attempts.

NOTE

When STAR



Modem™ acts as Client and

STARGATE™

acts as

Server, FIFO disabled only works if two-way transmission mode is

set.

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 71 72

Keine Kommentare

Datalogic Star Bedienungsanleitung Seite 46