Section 4 Initial Setting
4-2
E 488.1 defined the following two levels of GPIB system initialization.
Initialization of bus:
Interface functions of all devices connected to the bus are initialized by an IFC
message from the controller.
Initialization of devices:
All devices on the GPIB are initialized with a GPIB bus command “DCL”, or
only the specified devices are initialized to their specified states with a GPIB bus
command “SDC.”
IEEE 488.2 defines three levels. At level 1, “bus initialization” is performed.
This is the highest level. “Device initialization” is divided into “message ex-
change initialization” (level 2) and “device initialization” (level 3). IEEE 488.2
also defines the device power-on status.
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