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DR300 Operator Manual
2 : Input/Output Signal Explanation
Pin No.
Signal
Direction
Name
1
F G
2
S D
3
R D
7
S G
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
FG
RD
SD
SG
• Some host needs looping of RS and CS at host side to keep signal High
3 : Input/Output signal explanation
Pin No.
Signal
Direction
Name
1
F G
2
S D
3
R D
7
S G
-
Frame ground
Output
Data to be transmitted from printer to host
Input
Data to be transmitted from host to printer
-
Signal ground
Printer
1 FG
2 SD
3 RD
7 SG
-
Frame ground
Output
Data to be transmitted from printer to host
Input
Data to be transmitted from host to printer
-
Signal ground
Chapter 10 - Serial Interface
Contents
Contents
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