Omron C500-ASC04, Руководство по эксплуатации

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Appendix B Specifications
111
The following timing chart applies when the peripheral devices are SCRN and LPRT when the OPEN instruction is
executed.
Port 1
Port 2
Data transmission
Data transmission
CLOSE
ON
OFF
DTR (output)
RTS (output)
DSR (input)
CTS (input)
ON
OFF
Data
OPEN
ON
OFF
ON
OFF
Always ON
Normally OFF
Check
Check
Check
Check
Always ON
Normally OFF
PRINT
completes
PRINT starts
Transmission from a Peripheral Device to the ASCII Unit
The DTR signal is ON when the KEYB or COMU is selected as the peripheral device with the OPEN instruction.
The RTS signal will be OFF if the effective signal wire is X (normally OFF) when the OPEN instruction is executed.
If the effective signal wire is O (normally ON), the RTS signal will be ON from the execution of the OPEN instruction
until the execution of the CLOSE instruction.
When the RTS signal is always ON, reception data will be stored in the buffer regardless of whether or not the
INPUT instruction has been executed.
The INPUT, INPUT#, or INPUT$ instruction turns the RTS signal ON and data, if any, will be input. The CTS and
DSR signals will not be checked.
When the CLOSE instruction is executed, Port 1 will be assigned to TERM and Port 2 will be assigned to LPRT.
Data transmission
Data transmission
CLOSE
ON
OFF
DTR (output)
RTS (output)
ON
OFF
Port 1
Port 2
Always ON
Normally OFF
Always ON
Normally
OFF
INPUT
complete
INPUT starts
OPEN
Data
Transmission from peripheral devices is possible when the RTS signal is ON.