App - 29 App - 29
MELSEC-Q
APPENDIX
1 When the communication module is started up, the ER (DTR) control signal is turned OFF.
The ER (DTR) control signal turns ON when the communication channel is opened. After that, the ER
(DTR) control signal turns ON and OFF when data is received depending on the size of the free area in the
receive buffer.
2 Even if the ER (DTR) control signal is turned OFF, the received data is stored in the receive buffer until
there is no more free area in the receive buffer.
3 The ER (DTR) control signal does not turn OFF even if the communication channel is closed.
Even after the channel is closed, the ER (DTR) control continues and data received from the external
device is stored until there is no more free area in the receive buffer. However, the received data
remaining in the receive buffer when the communication channel is closed and the received data stored in
the receive buffer after the communication channel is closed cannot be read by the BASIC program. When
the communication channel is reopened, the received data in the receive buffer is cleared.
• In order to enable the ER (DTR) control, specify 1 or greater in the receive buffer specification when
opening the communication channel.
• The ER (DTR) control signal is turned OFF if the communication channel is opened without enabling
the ER (DTR) control.
• The RS (RTS) control has the same control function as the ER (DTR) control.
Determine which of the control functions of the communication module to use depending on
the external device's specifications.
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...