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YORK INTERNATIONAL102
displayed, indicating the Serial Port is defective.
A FAIL result would be indicative of a defective
Microboard. The following is a description
of each test.
COM 1 – Two tests are performed. Test data is
sent from TX (J2-4) to RX (J2-3) at 9600 Baud
and DTR (J2-5) is set to a Logic High level and
read at DSR (J2-2). If any test fails, COM 1
tests are terminated.
COM 2 – Three tests are performed. Test data
is sent from TX (J13-5) to RX (J13-3) at 19200
Baud. DTR (J13-7) is set to a Logic High and
read at DSR (J13-2) & DCD (J13-1). RTS
(J13-4) is set to a Logic High and read at CTS
(J13-6) & R1 (J13-8). If any test fails, COM 2
tests are terminated.
RS-485 (COM 3 & 4a) – Test data is sent from
COM 3 RS-485 port to COM 4a RS-485 Port at
19200 Baud. Test data is then sent from COM
4a to COM 3 at the same rate. If either test fails,
RS-485 tests are terminated.
COM 4b – Test data is sent from GTX (J2-7)
to GRX (J2-6) at 19200 Baud.
3. After all desired tests have been performed,
press the DIAGNOSTICS key to return to the
MAIN DIAGNOSTICS Screen.
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