Product Manual

LCD and Remote Interface Setup Procedures
Command Use 5
5-9
4. Compound Commands
A compound command is two or more commands put on one command line isolated
from each other with semicolons. For example, the subsequent two individual
commands:
OUT 1 V OPER
can be mixed into the compound command: OUT 1 V; OPER
These commands tell the Product to source 1 V dc, and then go into operate mode.
5. Overlapped Commands
Commands that start execution but take more time than the usual communication
command/response interval to complete are overlapped commands. This is because
they can be overlapped by receipt the command that follows before they are
complete.
The detailed command descriptions in Chapter 6 show a check mark by Overlapped
for overlapped commands.
Use the command *WAI to stop until the overlapped command is complete before
you do the command that follows. For example:
OUT 1 V; *WAI
You can also use the status commands *OPC and *OPC? to find the overlapped
commands that are complete.
6. Sequential Commands
Commands that operate immediately are sequential commands.
The command descriptions in Chapter 6 show a check mark by Sequential for
sequential commands.
Most commands are sequential.
7. Commands for RS-232 Only
Some commands are used only for RS-232 serial operation because these functions
must be done as IEEE uniline (single control line) bus management messages per the
IEEE Standards. For example, the command REMOTE can be sent as data through
the IEEE-488 interface to put the Product into remote operation mode, but it is not
because the IEEE Standards tell you that the remote function to be sent to the device
as the uniline message REN. This is also true for some other commands and
functions, as shown in Table 5-3 with their RS-232 equivalents.
For these commands, the detailed command descriptions in Chapter 6 show a marked
box beside RS-232, but no check marked box beside IEEE-488.