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1.6. IEEE Address Selection
Before operating the DMM over the IEEE bus, set the address on the rear of the unit to the
required address and operating mode.
Addresses 0 and 16 are reserved for recalibration and should not be used unless recalibrating
the instrument. Address 31 is used to select self test mode.
The first five switches set the IEEE address and the last three switches are used to select the
instruments operation mode. The last three switches are normally set to off but may be used as
follows:
Switch 6 - Disable IEEE talk (transmit) mode.
Switch 7 - Disable IEEE listen (receive) mode.
Switch 8 - Dual Primary Addressing mode. In this mode, the unit will respond to two primary
addresses differing only in the least significant bit. For example, if the unit address selection
switches are set for an address of 8, the unit will also respond to address 9.
NOTE: The instrument only reads the address switch upon power up. Therefore if the IEEE
address is changed it will be necessary to switch the unit off and on again.
1.7. Local/Remote Operation
The 5075 is switched into remote operation when a valid command is received on the IEEE bus.
The unit will remain in remote control until the MENU/LOCAL key is pressed on the DMM or
until the unit is switched off.
1.8. Interface Clear Command - IFC
This command initiates a complete reset of the unit, which is then unable to respond to any
further IEEE commands for 1 second.
1.9. IEEE Command Format
IEEE commands are comprised of characters from the ASCII set. A series of commands can
be used to simulate the manual operation of the unit.
The commands must be in one of the following formats:
1) A single upper case character (A to Z).
2) An upper case character followed by a number.
Commands may be sent individually or build into a string separated with a slash character (/).
A command string may take the form of -
Terminator Character
IOCTL #2, "FO / R8/ X4" + CHR$ (13)
Controller specific command. 5075 command string.
