Sequential Commands; Commands That Require The Calibration Switch; Commands For Rs-232 Only - Fluke 522A/6 Operator's Manual

You can also use the status commands *OPC and *OPC? to detect completion of
overlapped commands. (See "Checking 5522A Status.")

Sequential Commands

Commands that execute immediately are called sequential commands.
In Chapter 6, the command shows a checkbox for sequential commands.
The majority of the commands are sequential.

Commands that Require the Calibration Switch

The following commands do not work unless the rear panel CALIBRATION switch is in
the ENABLE position:
CLOCK
FORMAT ALL
FORMAT CAL
*PUD
Attempting to use any of these commands with the CALIBRATION switch in the
NORMAL position logs an error into the error queue. (Or it returns the error message if
in the RS-232 Terminal Mode.)

Commands for RS-232 Only

The RS-232 checkbox indicates RS-232 interface commands.
The IEEE-488 and RS-232 interfaces both send commands to the Calibrator as data,
except for those IEEE-488 functions that must be implemented as a message as specified
in the IEEE-488 standards. For example, the RS-232 interface uses the command
REMOTE to place the Calibrator in the remote mode. Although the IEEE-488 interface
could also send a command REMOTE as data, it does not because this is one of the
functions that must be implemented per IEEE-488 Standards. The relationship between
these IEEE-488 messages and the equivalent RS-232 emulation is shown in Table 5-6.
IEEE-488 Message
GTL
GTR
LLO
SRQ
SDC, DCL
GET
SPE, SPD
[1] See "How IEEE-488 Operates" later in this chapter.
In addition to the commands and special characters that emulate the IEEE-488 functions
shown above, there are several more commands that are related to operation and control
of the actual RS-232 Host port and are therefore completely unrelated to IEEE-488
operations. These include the following six commands.
SP_SET
SP_SET?
(when setting date but not time)
Table 5-6. Commands for RS-232 Only
[1]
LOCAL command
REMOTE command
LOCKOUT command
SRQSTR command
^C (<Cntl> C) character [clear the device]
^T (<Cntl> T) character [execute a group trigger]
^P (<Cntl> P) character [print the serial poll string]
SPLSTR
SPLSTR?
RS-232 Equivalent
SRQSTR
SRQSTR?
Remote Operations
How to Use Commands
5-29
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