11.7.4. Recall All Settings
This recalls the last saved power supply settings. These may be from the last
*SAV 0 command (in section
11.7.3) or, if no
*SAV 0 has been sent, the last settings restored at power-up.
The recall command will change the following settings with only one command, where
<last> are the
last settings from
*SAV 0 or from power-up
:VOLT <last> :CURR <last>
OUTP:STAT <last> SYST:SET <last>
OUTP:PON <last> :CURR:PROT:STAT <last>
:VOLT:LIM:LOW <last> :VOLT:PROT:LEV <last>
The status and event registers are not affected by the recall command
Syntax:
*RCL 0
11.7.5. Self-Test
This is query to launch a simple self-test. It verifies the basic connections between the LAN microcontroller
and the control board microcontroller. The self-test result (pass or fail) is read from the message queue.
If the self-test failed and it returns 1, contact TDK-Lambda Americas Inc. Customer Service for further
instructions.
Syntax:
*TST ?
Responses: 0 when the self-test passed
1 when the self-test failed
11.8. Error and Status Commands
Any program that operates a remote power supply should routinely verify that the supply is accepting
commands as expected. There is always a chance that the program sent a command incorrectly, the supply
is set so a command cannot be carried out, or a fault condition has shut down the supply. A reliable program
will check for these errors.
There are three methods for checking the Genesys™ power supply status:
• IEEE-488.2 Registers: these are a few simple registers in which a bit is set because of a command error
or instrument fault condition. Little information about the type of fault is returned to the operator. The
registers are read, set and cleared using the Common Commands (these start with an asterisk).
• SCPI Registers: these are an extension of the IEEE-488.2 register set. SCPI adds registers which describe
exactly what fault conditions occur in the power supply. It also adds status registers that report operating
modes during normal operation.
• SYSTEM:ERROR Queue: This is a message-based error and status reporting system. When registers
are used, the operator must use a look-up table to find the meaning of each register bit position. The
SYSTEM:ERROR is a message where the status and error conditions are expressed in readable text. This
is the preferred method to verify commands are accepted.
11.8.1. Read System Error
This is query to read error messages from the power supply. It is recommended that after any command is
sent over the LAN, the SYSTEM:ERROR should be read to verify the command is accepted. The SYSTEM:ERROR
queue can also be set to report faults which have shut-down the supply’s output.
The SYSTEM:ERROR is a queue, or stack, that holds the last ten messages. The first error message entered
is the first one read. It is a good idea to read the SYSTEM:ERROR.
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