Et system LAB-HP/E Series - Page 22

Universal interface
16 ET System electronic GmbH
STATUS - Status
Query of device status. Return value in binary units. Function of the bits within the status byte:
Bit
Function
D15
-reserved-
D14
D13
D12
D11
- reserved -
D10
- reserved -
D9
- reserved -
D8
Limit mode, unit in power limitation mode
D7
Limit mode, unit in current limitation mode
D6
Local lockout (1 = LLO active, 0 = LLO not active)
D5
Local (1 = front panel operation)
D4
Remote (1 = digital interface operation)
D3
- reserved -
D2
- reserved -
D1
Standby (1 = unit in standby mode)
D0
OVP (1 = shut down by over voltage protection)
Example:
STATUS
Status query
STATUS,0000000100010000
Unit answers: Remote operation mode, power limitation
STB or *STB? - Interface Status
Displays the interface status.
UA[,<U
max
>]
This command adjusts the voltage limitation. Entering the command without parameters displays the present set
point. If the set point exceeds the maximum voltage of the unit, the range error bit within the ESR register of the
interface is set. The present set point remains unchanged. If the set point is higher than the selected value for U
limit
,
but lower than the unit’s maximum voltage, voltage limitation is restricted to U
limit
. There is no error message.
Example:Output Voltage is limited to 200V in Config menue
GTR
Remote control operation
OVP,320
Over voltage protection 320 V
UA,100
Output voltage 100 V
IA,10
Output current 10 A
SB,R
Output is active
UA,400
Output voltage 400 V. This command is ignored because the voltage is higher than the maximum voltage of the unit.
Range error is set within the status byte.
UA,250
Output voltage 250 V. Since the output voltage was limited to 200 V via configuration menu, voltage limitation is adjusted
to 200 V. An error bit is not set.
UA
Query of adjusted voltage
UA,200.0V
Unit answers: set point U
a
= 200,0 V