Fluke 5500A - Testing RS-232 Host Port Operation Using Visual Basic

5500A
Operator Manual
5-14
The characters REMOTE should have appeared on the terminal screen as they were
entered. If they did not appear on the screen, but the Control Display changed to
REMOTE CONTROL, then refer to step 4 of the “RS-232 Host Port Setup
Procedure” and change the REMOTE I/F setting from comp to term
.
If nonsense characters appeared on the screen, then you have a mismatch is RS-232
parameters. Refer to step 4 of the “RS-232 Host Port Setup Procedure” procedure for
the correct RS-232 settings and then repeat this procedure starting at Step 5.
If no characters appeared on the screen, then refer to step 3 of the “RS-232 Host Port
Setup Procedure” procedure to verify serial was selected for the Host port. Check
that you used the correct RS-232 cable. It must be in a null-modem configuration
where the RX and TX lines are reversed (see Appendix D) Also verify you have
connected to the correct COM port on the PC.
8. Type the command LOCAL and press <Enter>. Observe the 5500A Calibrator
Control Display changes back to the reset condition (below).
gl42f.eps
If you want to experiment with other commands in the command set, see Chapter 6,
“Remote Commands.” When finished, select the Exit command from the File menu
to close the Terminal accessory.
Hint: To save the communication parameters in Terminal for future operations, first
select Save from the File menu and then assign a name, for example, host.trm.
5-9. Testing RS-232 Host Port Operation using Visual Basic
Complete the following procedure to test RS-232 (Host) operation using the Windows-
based programming language Visual Basic. This procedure assumes you have completed
Appendix E, “Creating a Visual Basic Test Program” to create the group RS-232 Test.
Complete the following procedure to test RS-232 operation using Visual Basic.
1. Complete the “RS-232 Host Port Setup Procedure” earlier in this chapter to set up
the 5500A for RS-232 Host port operation. Note the RS-232 Host port parameters
that you selected in this procedure.
2. Connect the selected COM port on the PC to the 5500A SERIAL 1 FROM HOST
port using a standard null-modem RS-232 cable. (See Appendix D for information
on RS-232 cables and connectors.)
3. To start the program, open the Test Ports icon from the RS-232 Test group (below).
F5-0o.bmp
4. Verify the 5500A Calibrator is powered and in the reset condition (if in doubt, press
the R key), then click the Command1 button (below).