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RS-232C Communications
Section 6-2
Interval between
Transmitted Commands
As a small number of bytes is transmitted by the Host, the interval between
transmissions should not exceed 5 seconds if a command is divided up for
transmission. A timeout error occurs if the interval between transmissions
exceeds 5 seconds.
When commands are sent too frequently, a buffer overflow error may occur if
the NT20 cannot keep up with the command processing.
In order to prevent buffer overflow, use flow control.
Controlling PT Status with
Operating Commands
Control of the NT20 status by the operating commands is restricted by the
NT20 memory switch settings as listed below.
Coordinate Specification
with the Terminal
Commands
The entire command is ignored if any point specified at coordinates X, Y with
the Terminal commands lies outside the screen.
Error Display
If the “automatic reset after communications” memory switch of the NT20 is
set to ON, no message is displayed when a communications error occurs.
However, time-out errors are displayed.
Operating command
Restriction from memory switch setting
Buzzer control command [ESC] T
Effective when “buzzer turned on”
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...