App - 39 App - 39
MELSEC-Q
APPENDIX
(2) When a receive buffer is available
1) When data for the number of characters requested to be received is not stored
in the receive buffer
The reception data stored in the receive buffer up to the time the transmission
error occurred is returned to the BASIC program.
Data received normally after the transmission error is stored in the receive
buffer again, so it can be accessed by the BASIC program.
(BASIC program)
Communication channel open
Result of channel opening
Receive request
Input element
Reception
result
(Error
occurrence)
Receive buffer
Communication module
Data
"1"
"2"
"3"
"4"
"5"
"6"
"7"
"8"
"0"
"A"
"B"
"C"
"D"
"E"
"F"
(OS)
"1"
"2"
"8"
"A"
"B"
"C"
"D"
"E"
"F"
Data prior
to reception
"1"
"2"
"3"
"4"
"5"
"6"
"7"
"8"
Transmission
error occurrence
"0"
Ignor
e
d
ZOPEN to
ZRECEIVE to
Содержание A1SD51S
Страница 183: ...11 13 11 13 MELSEC Q 11 INSTRUCTIONS AND FUNCTIONS RUN Before swap A 0 H924 A 1 H1159 After swap A 0 H1159 A 1 H924 OK...
Страница 331: ...11 161 11 161 MELSEC Q 11 INSTRUCTIONS AND FUNCTIONS REMARK See the CON ON OFF STOP and ZOPEN functions and Section 7 4...
Страница 557: ...11 387 11 387 MELSEC Q 11 INSTRUCTIONS AND FUNCTIONS REMARK See the CHR SPACE and SPC functions...
Страница 629: ...11 459 11 459 MELSEC Q 11 INSTRUCTIONS AND FUNCTIONS REMARK See the ZOPEN ZSEND and ZCNTL instructions and Section 7 3 4...
Страница 645: ...11 475 11 475 MELSEC Q 11 INSTRUCTIONS AND FUNCTIONS REMARK See the ZEVENT ZSIGNAL and DEF ZEVENT instructions...