Remote Control; General; Command Reference - Hameg Instruments HM7044 Manual

R e m o t e C o n t r o l

Remote Control

General

The HM7044 is supplied with an USB/RS-232 interface (HO820)
ex factory. Optional an IEEE-488 (GPIB) interface (HO880) is
availale.
The instrument is programmable by a PC. Functions and
ranges can be selected and measurement values stored in
the instrument can be read out. The respective drivers are
available on the enclosed Product CD or can be downloaded
at http://www.hameg.com.
Interface parameters RS-232
The communication parameters of the interface are 9600 baud,
8 N 2, command termination CR (0x0D).
USB interface
You do not have to change the confi guration. If required, the
baud rate can be changed. Connect the HM7044 with your PC
using a USB cable and install the USB drivers like described
in the manual of the USB interface HO820.
GPIB interface
It is necessary to change the GPIB adress of the function
generator to the desired value. The adress is changed at the
interface on the back panel. Connect the HM7044 with your PC
using a GPIB cable and set the baud rate to 9600 baud.

Command reference

1. SELECT
Format: SEL(ECT) [1,2,3,4] [A(LL)] [N(ONE)] [?]
Selction of one, several or all channels.
Examples:
Command
Selection of channels I and II
SEL 1,2
Requesting the selection
SEL?
Selecting all channels
SEL ALL
Selecting no channels
SEL NONE
2. SET
Format: SET value [V] [A]
Setting the parameters V and A of the channels selected. If
no channels were selected, all channels will be changed.
Example:
Command
Setting channels I and II to 12.1V / 2.1A:
SEL 1,2
SET 12.1 V
SET 2.1 A
3. FUSE
FORMAT F(USE) [(1)(2)(3)(4)] [ON] [OFF]
Activating the electronic fuse for the channels selected.
24
Subject to change without notice
Answer
channel 1,2 selected
channel 1,2 selected
channel 1,2,3,4 selected
unselected
Answer
channel 1,2 selected
channel 1,2 set to 12.10 V
channel 1,2 set to 2.100 A
If no channels were selected, the electronic fuses of all
channels will be activated. The electronic fuses of up to 4
channels can be linked together.
Example:
Command
Setting the electronic fuse for channels I and II:
SEL 1,2
FUSE ON
Coupling the electronic fuses of channel I and IV and ad-
ditionally of channels II and III
FUSE 1,2,2,1
4. READ
Format: READ (READOUT/READVALUES)
This command reads back the actual values and states of
the several channels.
The answer consists of the output voltages set, the current
limits set and the states of the channels I - IV.
Example:
Command: READ
Answer: 00.01V 12.00V 13.22V 14.70V; 2.787A 0.000A 0.000A
3.000A; CC-1 CV-2 CV F3 OFF F4
that means:
channel I: 0.01 V, 2.787 A, CC, electronic fuse 1
channel II: 12.00 V, 0.000A, CV, electronic fuse 2
channel III: 13.22 V, 0.000 A, F3, OFF
channel IV: 14.70 V, 3.000 A, F4
OFF: The channel is off.
CV: The channel is in volatage regulation mode
(constant voltage)
CC: The channel is in current regulation mode
(constant current)
F/–: F = fuse is active
– = fuse is inactive
1,2,3,4: Parameter for the electronic fuse
5. LOCK
Format: LOCK [ON] [OFF]
Lock / Unlock keyboard entries.
If the keyboard is locked, the PROG. LED
Example:
Command
LOCK ON
LOCK OFF
6. ON
Format: ON
Activates the channels selected. If no channel is selected,
all channels are activated. The ENABLE OUTPUT command
has to be sent to put the outputs on.
Example:
Command
SEL 1
ON
7. OFF
Format: OFF
Disactivates the channels selected. If no channel is selec-
ted, all channels are disactivated.
Example:
Command
SEL ALL
OFF
Answer
channel 1,2 selected
channel 1,2 fuse aktivated
fuse set to 1,2,2,1
blinks.
Answer
keyboard locked
keyboard unlocked
Answer
channel 1 selected
channel 1 on
Answer
channel 1,2,3,4 selected
channel 1,2,3,4 off