Black Box PCW22A-R3, PCW22A-R4 manual Data Flow A/S-2G to Asynchronous Device

PROTOCOL CONVERTER A/S-2G

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

Bisynchronous Device A/S-2G Converter Asynchronous Device

ENQ

ACK 0

Send data block A

ACK 1

Send block A Unformatted mode— successive characters (including spaces) appear one after another as sent

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

Send data block B

2-second interval

WAK

ENQ

2-second interval

WAK

Send block B

ENQ

WAK resets ENQ counter with

respect to ENQ time out

ACK 0 (when buffer

available)

Send data block C

ACK 1

Send block C

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