User`s manual

The READ Registers The following READ registers are located on the multimeter.
– ID Register (base + 00
16
)
– Device Type Register (base + 02
16
)
– Status Register (base + 04
16
)
– Query Response Register (base + 08
16
)
– Data Buffer (base + 0C
16
)
The ID Register The multimeter’s ID Register indicates the classification, addressing mode,
and the manufacturer of the device.
Address 15 14 13 12 11 - 0
base + 00
16
Device
Class
Address
Mode
Manufacturer ID
Device Classification. Bits 15 and 14 classify the device:
00memory device
01extended device
10message-based device
11register-based device
The HP E1326B/E1411B multimeter is a register-based device.
Addressing Mode. Bits 13 and 12 indicate the addressing mode:
00A16/A24 address mode
01A16/A32 address mode
10RESERVED
11A16 address mode
The HP E1326B/E1411B multimeter uses the A16 address mode.
Manufacturer ID. Bits 11 through 0 identify the manufacturer of the
device. Hewlett-Packard’s ID number is 4095, which corresponds to
bits 11 - 0 being set to "1".
Given the device classification, addressing space, and manufacturer of the
HP E1326AB/E1411B multimeters, reading the ID Register returns FFFF
16
.
The “Programming Examples” section on beginning on page 220 shows
how to read the ID Register.
Appendix C HP E1326B/E1411B Multimeter Register-Based Programming 205