Manuals / York / Household Appliance / Thermostat

York 00497VIP manual Serial Inputs / Outputs Tests, From, RS-485, 3 & 4a, COM 4b, Procedure

Models: 00497VIP

1 112
Download 112 pages 21.96 Kb
Page 101
Image 101
SERIAL INPUTS / OUTPUTS TESTS

FORM 50.40-OM2

SERIAL INPUTS / OUTPUTS TESTS

FIG. 52

This diagnostic is used to verify correct operation of the Serial Data Ports. There is a test for each of the five Serial Data Ports. Each RS-232 port (COM 1, 2 and 4b) is tested by transmitting serial test data from outputs to inputs of each port. Both the transmit and receive functions as well as the control lines are tested. The RS-485 ports (COM 3 and 4a) are tested by transmitting serial test data from one RS-485 port to another. The TX/RX opto-coupled port (COM 5) is tested by transmitting serial test data from the TX output to the RX input. If the received data matches the transmitted data, PASS is displayed, indicating the serial port is OK. Otherwise, FAIL is displayed, indicating

00530VIPC

 

From

 

To

 

COM 2

J13-5

(TX)

J13-3

(RX)

 

J13-7

(DTR)

J13-1(DCD) &

 

 

 

J13-2(DSR)

 

J13-4

(RTS)

J13-6

(CTS) &

 

 

 

J13-8

(RI)

RS-485

From

 

To

 

(COM

J12-3

(+)

J11-3

(+)

3 & 4a)

J12-2

(-)

J11-2

(-)

Microboard Program Jumper JP27 must be installed in position 1 & 2.

the serial port is defective. Prior to performing each test, the Service Technician must install a wire loop- back connection as described below. Refer to Section 5 and Figure 35 of this book for description of the

 

From

To

COM 4b

J2-7 (GTX)

J2-6 (GRX)

5

Serial data Ports.

PROCEDURE

1.Using small gauge wire, fabricate loop-back connections and install as follows for each port to be tested. Failure to install the loop- back connection or configure the Microboard Program jumper as noted will result in a FAIL outcome for the test.

 

From

To

 

COM 1

J2-4

(TX)

J2-3

(RX)

 

J2-5

(DTR)

J2-2

(DSR)

Microboard Program Jumper JP27 must be installed in position 2 & 3

2.After connecting appropriate loop-back con- nections above, press the appropriate key to initiate the desired test. An LED will illuminate indicating the test is in progress. If it is desired to terminate the test, press the CANCEL TEST key. Test data is sent from an output to an input as described below. At the completion of each test, if the data received matches the data sent, the Serial Port operates properly and PASS is displayed. Otherwise, FAIL is

YORK INTERNATIONAL

101

Page 100 Page 102
Page 101
Image 101
York 00497VIP manual Serial Inputs / Outputs Tests, From, RS-485, 3 & 4a, COM 4b, Procedure
Page 100 Page 102