Et system LAB-HP/E Series - Page 21

Universal interface
ET System electronic GmbH 15
Allowed parameters for USB interface:
PCx,<baud>,<parity>,<data bits>,<stop bits>,<handshake>,<echo>
Parameter
Function
Baud:
1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 62500, 115200
Parity:
O, E, N
Data bits:
7, 8
Stop bits
1, 2
Handshake:
H, S, N
Echo:
E, N
Note: The USB interface of the PC is controlled like a virtual COM port and therefore the parameters correspond to those of the RS232
interface.
Allowed parameters for RS485 interface:
PCx,<baud>,<parity>,<data bits>,<stop bits>,<timeout>
Parameter
Function
Baud:
1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 62500, 115200
Parity:
O, E, N
Data bits:
7, 8
Stop bits
1, 2
Timeout:
0…100
If the interface parameters must be changed permanently, the data has to be saved after the PCx command with the
command <SS>. No return value.
Example:
PC1
Query of first interface parameters
PC1,RS232,9600,N,8,2,N,E
Unit answers: PC1 is a RS232 interface, 9600 bauds, 8 data bits, 2 stop bits, no handshake, no
parity, echo on.
PC1,115200,N,8,2,N,E
Adjust baud rate to 115200 baud.
The new baud rate is active immediately after the command has been sent!
PC2
Query of second interface parameters
PC2,RS485,9600,N,8,1,1
Unit answers: PC2 is a RS485 interface, 9600 bauds, 8 data bits, 1 stop bit.
Timeout when switching between receiving and sending is 1 ms.
PC2,9600,N,8,1,50
Increase timeout to 50ms.
PC3
Query of third interface parameters
PC3, EMPTY
Unit answers: Interface 3 is not available in this unit.
SS
Save settings.
RI or *RST - Reset Instrument
The unit executes a hardware reset. No return value.
SB[,{S|R|1|0}] - Standby
This command enables/disables the output. Entering the command without parameters displays the present standby
status. The commands SB,S and SB,1 switch the unit to standby mode, the output is disabled. The commands SB,R
and SB,0 disable the standby mode, the output is enabled.
Example:
GTR
Remote operation mode
OVP,200
Over voltage protection 200 V
UA,100
Output voltage 100 V
IA,10
Output current 10 A
SB,R
Output is active
SB
Retrieve standby status
SB,R
Unit answers: output is active