IEEE-488 PROGRAMMING
Device-dependent commands that control the Model 263 are listed in Table 4-5. These commands are
covered in detail in the following paragraphs. The associated programming examples show how to
send the commands with the HP-85.
NOTE
Programming examples assume that the Model 263 is at its factory default value of 8. In order
to send a device-dependent command, the controller must perform the following steps:
1. Set ATN true.
2. Address the Model 263 to listen.
3. Set ATN false.
4. Send the command string over the bus one byte at a time.
NOTE
REN must be true when sending device-dependent commands to the instrument, or it will ignore
the command and display a bus error message.
General HP-85 Programming Example-Device-dependent commands may be sent from the HP-85
with the following program:
When this short program is run, it will prompt you to enter a command string (line 10). If, for exam-
ple, the command string F2X is entered, the instrument will go to the volts function (line 20) after
END LINE is pressed. The program will then prompt for another command string.
Table 4-5. Device-Dependent Command Summary
Mode
Execute
Function
1 Corn :mand Description
Paragraph
X Execute other device-dependent commands
4.7.15
I
FO OhIllS
4.7.4
Amps
volts
Coulombs
I
F4
V/R Amps
F5 External Volts
F6 Ladder
F7
V/R Coulombs
4-10
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