TDK-Lambda Genesys Series, Техническое руководство

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7.5. OUTPUT PROTECTION
7.5.1. Set Over-Voltage Protection
This command sets the over-voltage protection level. If the power supply output exceeds
this voltage at it’s output (or remote sense point), then the output will immediately turn off,
the supply front panel will show “OUP” and the Questionable Condition register bit 4 will be
set high.
The voltage limit setting, made by the front panel encoder or the
:VOLT
command (in
section 7.2.1), is restricted to 95% of the OVP setting. Likewise, the OVP setting cannot be
made lower than 105% of the voltage limit setting. The over-voltage protection may not be
disabled
The OVP setting may be viewed on the supply front panel by pressing and releasing the
OVP/UVL button. This fault is cleared by turning the power supply output on again
Syntax:
[SOURce]:VOLTage:PROTection:LEVel <nn.nn|MAX>
Parameter:
nn.nn
will set the OVP to a value in volts
MAX
will set the OVP to the maximum value,
typically 10% above the power supply’s voltage rating
Example:
:VOLT:PROT:LEV 70
Query:
:VOLT:PROT:LEV?
will return
70
in the example
Errors: SYSTEM:ERROR? may return errors including:
+304,”OVP below PV”
-222,”Data out of range”
7.5.2. Read Over-Voltage Tripped
This query reports if an over-voltage protection fault has occurred. If a fault has occurred,
it may be cleared by turning the power supply output on again (see the
OUTP:STAT ON
command, section 7.2.3)
Syntax:
[SOURce]:VOLTage:PROTection:TRIPped?
Example:
:VOLT:PROT:TRIP?
Responses:
0
when no OVP fault is active
1
when supply is shut-down because of an OVP fault
7.5.3. Set Under-Voltage Limit
The under-voltage limit keeps the voltage setting from being less than a certain value. If
the actual power supply output (or remote sense point) drops below the UVL, no fault is
reported and the supply continues to operate in the constant-current mode (you may use
the foldback protection to report a fault when this occurs, see section 7.5.5)
The voltage limit setting, made by the front panel encoder or the
:VOLT
command (in
section 7.2.1), must always be higher than 105% of the UVL setting. Likewise, the UVL
setting cannot be made higher than 95% of the voltage setting
The UVL setting may be viewed on the supply front panel by pressing and releasing the
OVP/UVL button twice
Syntax:
[SOURce]:VOLTage:LIMit:LOW <nn.nn>
Parameter:
nn.nn
will set the UVL to a value in volts
Range is zero to 95% of the present voltage setting
Example:
:VOLT:LIM:LOW 5.100
Query:
:VOLT:LIM:LOW?
will return
5.100
in the example