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DR300 Operator Manual
79
2 : Input/Output Signal Explanation
Pin No. Signal
Name
Direction Contents
1 F G - Frame ground
2 S D Output Data to be transmitted from printer to host
3 R D Input Data to be transmitted from host to printer
7 S G - Signal ground
Status 3 Protocol
1 : Status-3 protocol enables host to have full control of the printer by knowing the
printer status. Printer sends status immediately upon receiving enquiry command from
host. This protocol can only be used for multi items receive buffer setting.
Data stream (ESC + “A” ~ ESC + “Z”) from host might not be fully received by printer
under the following conditions:
• Printer is in printing process
• Printer is engaged with error condition
2 : Cable connection
Host Printer
FG 1 FG
RD 2 SD
SD 3 RD
SG 7 SG
• Some host needs looping of RS and CS at host side to keep signal High
3 : Input/Output signal explanation
Pin No. Signal
Name
Direction Contents
1 F G - Frame ground
2 S D Output Data to be transmitted from printer to host
3 R D Input Data to be transmitted from host to printer
7 S G - Signal ground
Chapter 10 - Serial Interface