567
Outline of Communications
Section 9-3
S
Processing differences according to command length
- If a command is too long because it has been incorrectly specified, an error
response for a command length error is returned.
- If a command is short because it has been incorrectly specified, a communica-
tion error (time out) occurs.
S
Command transmission intervals
- If commands are sent too frequently, processing at the NT31/NT31C will not
be able to keep pace with them and a communication error (buffer overflow)
will occur.
- Use the flow control to prevent a buffer overflow.
S
Order of priority of input communication commands
- When a reason for input notification arises during processing of a command
from the host, the input command is issued only after the ongoing command
processing has been completed.
S
Check sum
- The checksum of the command response is the 2 digits ASCII code which is
indicated using lower one--byte of the total sum (in unit of bytes) of the follow-
ing, from the [ESC] code at the beginning to the character immediately before
the checksum value. It can be omitted by specifying the parameter used to
omit sum value.
If “ON” is set for the “Comm. Auto-return” memory switch, communication er-
rors are not displayed on the screen even if they occurs. However, in case of
time out error at the NT31/NT31C side, an error message is displayed on the
screen and the operation is stopped.
Reference: Whether or not the error response is returned depends on the memory switch set-
ting made for “Comm. Auto-return” and error type.
For details, refer to “Error Response” in page 598.
Содержание NT31 Series
Страница 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Страница 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Страница 41: ...30 Before Operating Section 1 5...
Страница 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Страница 160: ...149...
Страница 174: ...163...
Страница 193: ...182...
Страница 211: ...200...
Страница 235: ...224 c Return to the screen on which screens are specified...
Страница 262: ...251...
Страница 284: ...273 The printer type control protocol and printing method are set with the memory switches of the NT31 NT31C...
Страница 347: ...336 Screen number 5 is set for touch switch 1 To next screen When touch switch 1 is pressed Screen number 5...
Страница 360: ...349 It is not possible to control a gloval window by touch switch operation...
Страница 375: ...364 For details on the method of display depending on the General settings refer to Common Attributes page 358...
Страница 391: ...380 1 The 100 value 0 value and 100 value must comply with the following relationship 100 value 0 value 100 value...
Страница 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Страница 476: ...465 Special Functions Section 7 16...
Страница 495: ...484 OFF...
Страница 610: ...599 Commands Responses Section 9 3...
Страница 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...