53
Signal Line
CTS
DSR
RTS
XON/XOFF
0
Valid
Valid
Valid
Invalid
1
Valid
Valid
Invalid
2
Valid
Invalid
Valid
3
Valid
Invalid
Invalid
4
Invalid
Valid
Valid
5
Invalid
Valid
Invalid
6
Invalid
Invalid
Valid
7
Invalid
Invalid
Invalid
8
Valid
Valid
Valid
Valid
9
Valid
Valid
Invalid
A
Valid
Invalid
Valid
B
Valid
Invalid
Invalid
C
Invalid
Valid
Valid
D
Invalid
Valid
Invalid
E
Invalid
Invalid
Valid
F
Invalid
Invalid
Invalid
Remarks:
To make the CTS signal invalid at port 2, pull the CTS line high or connect it
to the RTS line.
When the RTS is specified to be ON (valid), the RTS signal goes high when
the port is opened and remains high until the port is closed. When the RTS
signal is specified to be OFF (invalid), the RTS signal remains low unless an
I/O statement such as PRINT or INPUT is executed.
When continuously receiving data from a peripheral device, specify RTS ON.
When implementing the interrupt function with ON COM, specify RTS ON. If
RTS OFF is specified, interrupts will not be received.
When data is received with the XON code specified to be valid, and the data
buffer is filled to 3/4 of its capacity, the XOFF code is sent, requesting a
pause of transfer. If the contents of the receive buffer decrease to 1/4 of the
buffer capacity, the XON code is sent, requesting resumption of transfer.
When the XOFF code is received during data transfer, transfer is paused.
When the XON code is received, transfer is resumed.
If the communication specification and the valid signal line are omitted, their
defaults are:
Peripheral Device
Communication
Conditions
Valid Signal Line
Terminal
4
3
Keyboard
4
3
Display
4
3
RS-232C device
4
3
Printer
4
5
Ports already open cannot be opened again. When the OPEN and CLOSE
statements are used, port 1 is assumed to be for a terminal and port 2 is as-
sumed to be for a printer. Port 2 cannot be selected for a terminal.
I/O statements specifying #<port> cannot be used to transfer data through a
port that has not been opened with the OPEN statement. To input/output data
in the case where the OPEN statement has not been executed, use the I/O
statements without the #<port> specification.
BASIC Language
Section 4-2
Summary of Contents for SYSMAC C200H-ASC02
Page 1: ...Cat No W165 E1 04 ASCII Unit SYSMAC C200H ASC02 ...
Page 2: ...C200H ASC02 ASCII Unit Operation Manual Revised September 2002 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 7: ...TABLE OF CONTENTS viii Glossary 159 Index 163 Revision History 165 ...
Page 122: ...Appendix B Specifications 115 130 35 100 5 ...
Page 168: ...Cat No W165 E1 04 C200H ASC02 ASCII Unit OPERATION MANUAL ...