Remote Control; General; Command Reference - Hameg Instruments Hm7044 Handbuch

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

Remote Control

General

The HM7044 is supplied with a serial interface ex factory.
As optional accessories an USB interface (HO870), an IEEE
interface (HO88) or a serial interface (HO890), all galvanically
isolated, are availale.
The communication parameters of the interface are 9600 baud,
8 N 2, command termination CR (0x0D).
After every accepted command the instrument answers with
a corresponding answer.

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.
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.
24
Subject to change without notice
All manuals and user guides at all-guides.com
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
Answer
channel 1,2 selected
channel 1,2 fuse aktivated
fuse set to 1,2,2,1
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
ON
8. ENABLE OUTPUT
Format: EN(ABLE OUTPUT)
Puts on all channels activated with the ON command
(equivalent to the OUTPUT buton).
Example:
Command
ENABLE OUTPUT
EN
9. DISABLE OUTPUT
Format: DIS(ABLE OUTPUT)
Puts off all channels (equivalent to the output button)
Example:
Command
DISABLE OUTPUT
DIS output
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 on
Answer
output enabled
output enabled
Answer
output disabled
disabled