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IEEE 488 Bus Commands
These comands are GPIB / 488 interface specific commands.
In command mode (ATN line low), the power supply can receive three classes
of commands:
Talk and Listen addresses: They define which device from GPIB interface will
be the active Talker and which devices will be the active Listeners. When ATN
line is true, all devices must wait for the commands: listeners an talker will be
assigned.
Universal commands: they are commands sent by the Controller to all devices
from GPIB interface. The universal commands consist of:
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commands sent using general bus management lines. They are called
uniline commands. For more information, please refer to General bus
management lines section.
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commands encoded as bytes. They are sent over DIO lines, so they are
called multiline commands.
DCL (Device Clear)
Resets the power supply to its default state. This command is equivalent to
the *RST command, so the power supply will go to reset state.
LLO (Local Lockout)
Disables front panel keys, including Remote/Local key (which allows you
to put the power supply in local mode). The power supply settings can no
longer be changed from the front panel.
SPE (Serial Poll Enable)
Tells the addressed Talker to send a status byte. This byte gives
informations about the device to the Controller.
For more information about Status Byte, please refer to SCPI Status
Registers section.
For more information about Serial Poll, please refer to Serial Poll
Procedure section.
SPD (Serial Poll Disable)
Disables Serial Poll procedure. For more information about Serial Poll,
please refer to Serial Poll Procedure section.
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