Dascom 7010 Programmers Manual DMX Manual do Utilizador descarregar pdf (Página 135)

133

2 XON/XOFF protocol

(a) Conditions for sending XON

･ Communication is enabled after power is turned ON.

･ Residual capacity of the buffer is 1 K bytes or more after

sending XOFF code.

･ XOFF code is output due to error and printer returns to normal

conditions.

(b) Conditions for sending XOFF

･ Printer is in error.

･ Printer is in pause state.

･ Received buffer has less than 128 bytes available.

128 bytes

1K bytes

Reception buffer = 16K bytes

XON code transmission

XOFF code transmission

Reception data

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 155 156

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Dascom 7010 Programmers Manual DMX Manual do Utilizador Página 135