Star Micronics DOT MATRIX PRINTER SP2000 - Manual (Page 47)

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FUNCTION Transmits ENQ status
CODE <ENQ>
(05)H
OUTLINE Transmits the ENQ status of the printer to the host in real-time.
(Does not execute after taking fro reception buffer, but immedi-
ately upon receiving from the host.) It is in a “Data ready” state
when using a bi-directional parallel interface.
• When one <ENQ> command is sent to the printer, it will not
send the next <ENQ> command until the ENQ status is
received.
• When using the <ENQ> command, always set the automatic
status function to invalid.
b7 b6 b5 b4 b3 b2 b1 b0
Bit 0: Parallel Error (*1)
1: Error
Bit 1: Framing Error (*1)
1: Error
Bit 2: Mechanical Error
1: Error
Bit 3: No Paper Error (Same as EOT Bit 3)
1: Error
Bit 5: Buffer Empty (*1)
1: Buffer "Empty
Bit 6: Buffer Overflow
1: Overflow
Bit 7: Compulsion SW (*2)
ENQ Status
*1: Bit 0 and Bit 1 are valid only with a serial interface. Bit0 =
Bit1= 0 when using a parallel interface.
*2: Compulsion Switch
When the pin No. 6 on the connector for external device drive
circuit is HIGH (Switch ON), Bit 7 = 1.