Hioki DM7275-01 - 8 Preparing to Use USB, RS-232 C, GP-IB, and LAN Control; Overview of Interfaces and Associated Features

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PreparingtoUseUSB,RS-232C,
GP-IB,andLANControl
8.1 Overview of Interfaces and Associated Features
The instrument’s USB, RS-232C, GP-IB, and LAN interfaces can be used to control the instrument
and acquire data from it.
This chapter describes how to prepare to use this functionality, including how to congure
associated settings.
For more information about how to control the instrument and acquire data from it, see the sections
that best suite your application or intended use.
To control the instrument
using communications
commands
To create control programs
To control the instrument
easilywithoutcreatinga
program
To acquire measured
values without using
communications commands
Preparations (connections and settings)
• Using the USB interface

p. 98
• Using the RS-232C interface

p. 100
• Using the GP-IB interface

p. 102
• Using the LAN interface

p. 104
Control method:
See the Communication
Command Instruction Manual on
the included application disc.
Control method:
Use the sample application
software*.
Control method:
See “9 Outputting Data”
(p. 111).
*The software can be downloaded from our website (http://www.hioki.com).
Choose one interface to use. Communications control cannot be used at the same time.
See “13.4 Interface Specications” (p. 163)
About communications time
• Display processing may lag depending on the frequency and content of communications
processing.
• Consider the data transfer time when communicating with connected external devices.
1. GP-IB, USB, and LAN transfer times vary with the connected external device.
2. USB and LAN transfer times vary with communications quality.
3. When using 1 start bit, 8 data bits, no parity, and 1 stop bit for a total of 10 bits and a transfer
speed (baud rate) setting of N bps, the RS-232C transfer time will be roughly as follows:
Time required to transfer 1 character T (sec./character) = 10 [bits] / baud rate N [bps]
Example: For the string “ABCDE12345”
The two characters “CR+LF” will be added as a message terminator (delimiter), bringing the
total of characters transferred to 12. Over a 9600 bps connection, the transfer time would be
12 × T = 12 × 10/9600 = 12.5 ms.
• For more information about command execution times, see the Communication Command
Instruction Manual on the included application disc.
8 Preparing to Use USB, RS-232C, GP-IB, and LAN Control
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Preparing to Use USB, RS-232C, GP-IB, and LAN Control
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