Measurement Computing Serial488A - Manual (Page 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
1 2 3 4 5 6 7 8 DOT
Switch
Side
View
OPEN
1 2 3 4 5 6 7 8
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 3 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.