Black Box PCW22A-R3 Bedienungsanleitung PDF herunterladen (Seite 25)

PROTOCOL CONVERTER A/S-2G

Data Flow — A/S-2G to Asynchronous Device

Bisynchronous Device A/S-2G Converter Asynchronous Device

ENQ

Send data block A

Send data block B

ENQ

Send data block C

Unformatted mode—

successive characters

(including spaces) appear

one after another as sent

ACK 0

ACK 1

Send block A

WAK

Send block B

ACK 0 (when

buffer

available)

ACK 1

Send block C

If A/S-2G buffer is nearly full when synchronous device is transmitting:

2-second interval

WAK resets ENQ counter with

respect to ENQ time out

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Black Box PCW22A-R3 Bedienungsanleitung Seite 25