Star SCP700 Série Guide D'utilisation page 169

Optional serial interface pins and signal names
13
25
Pin Signal
Direction
No. Name
1 FG —
2 TXD OUT
3 RXD IN
4 RTS OUT
Frame Ground
Transmission data
Receive data
1 Star mode or slip TM-295 mode
Indicates whether or not the printer can receive data from the host.
1) DTR mode
When the printer is ready to receive data, this signal changes to a space.
2) X-ON/X-OFF mode
This signal is a space, except in the following cases.
1. After reset until communication is possible
2. During test printing
2 Receipt TM-T85 mode
1) DTR/DSR mode
Indicates if the printer is busy or not.
Space: Printer ready
Mark: Printer busy
The conditions for busy will vary according to the memory switch settings.
Printer Status
1. From when the power is turned on or I/F
reset until communication possible
2. Test printing
3. Paper feed by paper feed switch
4. Stop due to no paper
5. During waiting for switch input in macro
execution
6. Other errors
7. Receiving buffer full
Function
Memory SW #4-4
1
BUSY
BUSY
—
—
—
—
BUSY
165
1
14
0
BUSY
BUSY
BUSY
BUSY
BUSY
BUSY
BUSY