Measurement-computing Serial488A Instrukcja Użytkownika Pobierz pdf (Strona 23)

2.13

The

Peripheral

mode is used when interfacing a serial device to an IEEE

controller. Data which is sent by the IEEE controller to the

Serial488A

is transmitted

out its serial port. Data received from the serial device is buffered by the

Serial488A

until read by the IEEE controller. Refer to

Section 4

for more detailed information on

the peripheral mode of operation.

The factory default is the

IEEE Controller

mode, an RS-232 to IEEE converter.

SW2 View for Mode Selection

OPEN

12345678

DOT

Switch

Side

View

OPEN

12345678

Controller Mode Peripheral Mode

2.6 IEEE Address Selection

SW3-1 through SW3-5 select the IEEE bus address of the

Serial488A

when in

the

IEEE

Peripheral

mode. These same switches are used in the

IEEE

Controller

mode to select the address of the device that will be controlled. [Refer to

Sections 4

and

respectively for additional information]. The address is selected by simple

binary weighting with SW3-1 being the least significant bit and SW3-5 the most

significant. The factory default is address 10.

Listen Only

is a special type of

Peripheral

operation. In the

Listen Only

mode

the

Serial488A

accepts all data transmitted on the bus, ignoring any bus addressing,

and transfers it out its serial port. The

Serial488A

is set to

Listen

Only

mode by

setting its address to 31. If the IEEE address is set to 31 in the peripheral mode, it is

adjusted to 30.

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