Remote-processing RPC-2350 Manuel d'utilisateur télécharger pdf (Page 15)

CHAPTER 2 SETUP AND OPERATION

2-9

WHERE TO GO FROM HERE

If you w ant to do th is Go to

chapter

Save a program 3

Autorun a program 3

Know m ore abo ut serial por ts 4

Use the SPI port 4

Using RAM to save variables 5

Storing variables in F lash 5

Configure digital I/O lines 6

Read switch status 6

Use high current outputs 6

Connect an external opto rack 6

Using calendar/clock 7

Reading voltages (Analog input) 8

Analog output 8

Using a keypad 9

Character display port 10

Sound or timer output 11

Using inter rupts 13

Using high speed counter 14

Graphics display 15

Power input and output 16

Expansion port 16

Also, refer to the table of contents for a listing of major

functions.

TROUBLESHOOTING

You probably turned to this section because you could

not get the sign on message. The following are

troubleshooting hints:

1. Check the power on the RPC-2350. A good place is

C13+ and -. If it is below 4.65 volts, the RPC-

2350 will be r eset. Power is 5 ±0.25 volts. If it

dips intermittently to 4.65 volts (due to switching

noise or ripple), the card will reset for about 100

ms. If the noise is frequent enough, the card will be

in permanent reset. Check U14, pin 6. If it is low

(about 0 volts), then it is in reset. This line should

be high (about + 5 volts).

If you are using a 6-15V supply, make sure it does

not dip below 6V even intermittently. Use a scope

to make sure it does not. A voltmeter m ay not be

good enough.

The same can be said for the 5V supply. Make sure

it does not dip below 4.8V using an oscilloscope.

2. Check the COM1 port. COM 1 is also known as

console port J1. Remove the connector from

COM 1. Refer to the outline drawing ear lier in this

chapter. Connect an oscilloscope (preferred) or a

voltmeter to pin 3 (Txd ) and gro und. Pin 3 should

be -6 volts or more negative. (Pin 1 is designated

by the ^ sym bol on the connector. Pin 3 is next to

it, nearer the key opening.) If you have -6 volts or

more, press the reset switch. If you have a scope

attached, you should see a burst of activity. If you

have a volt meter, you should see a change in

voltage. Using a Fluke 8060A set to measure AC,

you should see a mom entary rea ding above 2 volts.

Press reset several times to make sure it captu res it.

3. Install the cable and make sure the voltages and

output activity are still there. Output is from pin 3

on the VTC-9. Check to make sure something is

not shorting the output.

4. Check the serial pa ram eters on your P C or terminal.

They should be set to:

19200 baud, no parity, 8 data bits, 1 stop

If all of this fails, call technical support listed at the front

of the book.

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Remote-processing RPC-2350 Manuel d'utilisateur Page 15

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