Citizen Systems CLP-6001, CLP-6002 user manual 4 RS-232C protocol, Fig. Buffer in use

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6.2.4RS-232C protocol

(1)X-ON/X-OFF system (see the figure)

This is a control system in which the data transmission request signal (X-ON (11H) code) and the data transmission stop request signal (X-OFF (13H) code) are output.

Requirements of output of X-ON code:

When the power is switched to ON.

When the remaining buffer is 2K bytes or less, the X-OFF is output, and the remaining buffer is 4K bytes or more.

Requirements of output of X-OFF code:

When printer error occurs.

When the remaining buffer is 2K bytes or less.

Receive buffer = 32K bytes

 

4K bytes

 

2K bytes

Receiving data

 

X-ON code output

X-OFF code output

 

Note: Even if each code is ready for output, the same code cannot be transmitted twice successively (except when the power is turned on or the printer is reset from the control panel).

Fig. Buffer in use

6-9

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Contents CLP-6001/6002 FCC Compliance Statement For American Users EMI Compliance Statement For Canadian Users Important Safety Instructions Page Safety Signs Page General Precautions Precautions When Installing the Printer Chapters in This Manual Table of Contents Chapter Troubleshooting Xii Chapter Setup Confirmation of Carton Contents Part Names and Functions Front ViewInside View Names and functions of each part Side View Connection to Power Connection to a Computer Chapter Control Panel Control Panel LCD/LED Indications and Adjustment Controls Normal Operating ModePrinter Setup Mode Self-Test ModeSystem Maintenance Mode Mode item Indication Default valuesVoltage setting mode Chapter Paper and Ribbon Specification of Label and Tag Kinds of PaperPaper specification Units for position and length Reference line and points Ribbon Paper Setting Roll paper Reference side Notch for alignment Ribbon Setting Print Head Offset Adjustments Print head position for label Upper frame window Head pressure adjust-screw Ribbon Tension Adjustments Ribbon width Ribbon winding Ribbon feed Tension SectionPaper Detector Adjustments for CLP-6001 only Exterior view and part namesHow to operate adjustable sensor Page Troubleshooting Error Messages Error descriptions and indicationsCmnd Error indications and corrective actions Page − − Power Troubleshooting Paper Feed Troubleshooting Ribbon Feed Troubleshooting Print Troubleshooting Interface Troubleshooting Page Chapter Options Peeler Unit Adjustable Sensor Auto-Cutter UnitPcmcia Memory Card Page Chapter Specifications Main Specifications PostnetPage LCD Description System configuration InterfaceSpecification of interface Serial interface3 RS-232C loopback test Fig. Loopback test4 RS-232C protocol Fig. Buffer in usePage Interface pin assignment Parallel interface pin assignment table Outline of Command System STX + L With print Without printExample of Connection to a Computer Turning Tear ON/OFF Tear-off when printingTear-Off Function Tear-off when feeding Paper is fed to the tear positionCut position adjustments Tear-off and type of dataWhen fnnn command is executed while tear-off is OFF Priority order