Black Box PCW22A-R3, PCW22A-R4 manual Echo CR LF Send block F Echo all but CR LF

PROTOCOL CONVERTER A/S-2G

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

Bisynchronous Device A/S-2G Converter Asynchronous Device

(Echo CR LF) Send block F (Echo all but CR LF)

ENQ

2-second interval

WAK

WAK resets ENQ counter

ENQ

Sync device buffer space available

ACK 1

Send block F

ACK 0

(Echo CR LF)

If data not yet available from asynchronous device:

If over 3-second interval

AA 32 32 32 32 02 2D FF FF TTD

NAK

AA AA 32 32 32 32 3D FF FF

Line release or turnaround:

Send block G,

(end with EOT Hex 04) (Echo all but CR LF EOT)

Send block G

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