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[ 21 ] RS232C PORT batch test
[Function]
This is the RS232C port batch test.
The loop back test for RS232C port is performed by making the connection shown in the figure.
When performing this test, fix loop back connectors to all COM ports.
[Operation]
Operation : 4 0 SUBTOTAL
Baud rate: COM1: 115 kbps, COM 2 – 4 : 9600 bps
Check time: one time
[LCD]
Displays the following.
[Print]
COM1 40
RTS1=1 --> CTS1=1 OK
DTR1=1 --> DSR1=1 OK
DTR1=1 --> CD1=1 OK
DTR1=1 --> CI1=1 OK
RTS1=0 --> CTS1=0 OK
DTR1=0 --> DSR1=0 OK
DTR1=0 --> CD1=0 OK
DTR1=0 --> CI1=0 OK
TxD --> RxD OK
RTS2=1 --> CTS2=1 OK
DTR2=1 --> DSR2=1 OK
RTS2=0 --> CTS2=0 OK
DTR2=0 --> DSR2=0 OK
TxD --> RxD OK
END 40
COM 1 test result
COM 2 test result
COM3 and COM4 are printed the same way as COM2.
Figure : RS232C port connection
outputs "1" "0" from the output terminal and checks the input terminal.
TxD
RxD
CTS
RTS
DTR
DSR
CD
CI
TxD
RxD
CTS
RTS
DTR
DSR
COM1 COM2~COM4
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