Et system LAB-SMS/E Series, Руководство пользователя

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Universal interface
10 ET System electronic GmbH
UNIVERSAL INTERFACE
All interfaces of the digital interface are equal. There is no shift between the interfaces. For example, the first com-
mand can be issued via the IEEE interface while the second command can be issued via the RS232 interface. The re-
turn values will be sent from that interface the command was issued from.
C
OMMANDS
Communication is based on an ASCII protocol. The following chapters describe how to write a command and give an
overview over the commands.
Format
A command consists of the command word, a parameter (if necessary) and a terminator. The character for the termi-
nator is Carriage Return
<CR>
or Line Feed
<LF>
.
Character ASCII Dec value Hex value
Carriage Return <CR> 13 0d
Line Fee <LF> 10 0a
If the command contains a <DEL> or <ESC> character, it will not be processed. Therefore, a command can be cancelled
while entering. Though, a terminator (
<CR>
or
<LF>
) is necessary.
Character ASCII Dec value Hex value
Escape <ESC> 27 1b
Delete <DEL> 127 7f
Commands are not case sensitive and may be mixed up. Therefore, the effect of the following commands is the same:
GTL, Gtl, gTL. Decimal places are optional and separated by a full stop ‘
. ‘ . The number of decimal places is not limited.
Therefore, the effect of the following commands is the same: UA,10, UA,10.0, UA,10.000000000, UA,0010,
UA,010.0000
The number of decimal places to be analyzed depends on parameter and unit type. It corresponds to the number of
decimal places, a command without a parameter would return.
Example: Evaluation of decimal places of power supplies maximum output voltage and current
Range 100V - 999,9V 1000V - 1500V
Vol tage 000.0 0000
Range 0A - 9,999A 10A - 99,99A 100A - 999,9A 1000A - 9999A
Current 0.000 00.00 000.0 0000
15V - 99,99V
00.00
Example: LAB/SMS/E 580 (80VDC; 62,5A) digital interface reading Voltage 0.00
– 80.00V; Current 0.00 – 62.50A
Optional, after a numerical value, a letter may be added to indicate the unit. However, this letter will not be analyzed.
Example: Attached letter as unit
UA,10.0 V

Resets output voltage to 10 V
UA,10.0 m

Caution! The ‚m‘ will not be evaluated, output voltage here is also 10 V
Example: A valid command with corresponding hex values
U
A , 1 0 . 2 <CR>
55 h 41 h 2 ch 31 h 30 h 2 eh 32 h 0 dh
Example: Adjustment of output voltage 10 V/5 A (full command sequence)
OVP,100

adjusts OVP to 100 V
UA,10

adjusts output voltage to 10 V
IA,5

current limiting 5 A
SB,R

output enabled