The following brief steps can be used for checking communication between the PC and the plotter. It is advisable to write this test to a file and use a copy command to send it to whichever interface the plotter uses. The HP-GL code generates a small triangle. The color depends on the plotter configuration of pen 1.
note:Most Apple Macintosh systems are unable to use this method, because the HP-GL data cannot be copied directly to the interface.
In order to create the test file, simply enter the following commands. When the complete command set has been entered, press the Return or Enter key. When entering the commands, pay particular attention to correct punctuation, including spaces.
echo IN;SP1;PU0,0;PD1500,0;PA0,1500;PA0,0;PU;SP0;PG; > test.plt
Under UNIX (R)
echo > test.plt "IN;SP1;PU0,0;PD1500,0;PA0,1500;PA0,0;PU;SP0;PG;"
Check the files as follows
What is shown on the screen must correspond exactly to the commands entered. If not, repeat the Echo command, as shown above.
For the following testing, we recommend that you use the parallel (LPT) interface. This avoids lengthy configuration procedures. However, if you have to use the serial (COM) interface, please refer to the additional instructions below. Please ensure that only one interface is connected at any one time, because not all plotters are able to automatically switch between interfaces. If you are not certain that your device has this capability, switch it off and remove all interfaces, apart from the one which is to be used. Use short standard cables. Avoid using switch-boxes, wherever possible. Switch the device on again.