User Manual

Page 58
PSI 9000 2U Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
3.5 Alarms and monitoring
3.5.1 Denition of terms
There is a clear distinction between device alarms (see „3.2.5. Alarm conditions“) such as overvoltage protection
oroverheatingprotection,anduserdenedeventssuchasOVD (overvoltage detection). Whilst device alarms
servetoprotectthedeviceandtheconnectedloadbyinitiallyswitchingofftheDCoutput,userdenedeventscan
switch off the DC output (Action = ALARM), but can also simply give an acoustic signal to make the user aware.
Theactionsdrivenbyuserdenedeventscanbeselected:
Action Impact Example
NONE Userdenedeventisdisabled.
SIGNAL
On reaching the condition which triggers the event, the action SIGNAL will
show a text message in the status area of the display.
WARNING
On reaching the condition which triggers the event, the action WARNING
will show a text message in the status area of the display and pop up an
additional warning message.
ALARM
On reaching the condition which triggers the event, the action ALARM will
show a text message in the status area of the display with an additional alarm
pop-up, and additionally emit an acoustic signal (if activated). Furthermore
the DC output is switched off. Certain device alarms are also signalled to
the analog interface or can be queried via the digital interface.
3.5.2 Device alarm and event handling
A device alarm incident will usually lead to DC output switch-off, the appearance of a pop-up in the middle of the
display and, if activated, an acoustic signal to make the user aware. The alarm must always be acknowledged.
Ways to acknowledge:
• in manual control on the touch panel (see below)
• in analog remote control by switching the DC output off (pin REM-SB = LOW) and on again (pin REM-SB = HIGH)
• indigitalremotecontrolbyreadingtheerrorbuffer(SCPIprotocol)orbysendingaspeciccommandtoac-
knowledge alarms (ModBus)
► How to acknowledge an alarm in the display
1. If the alarm is indicated as a pop-up, tap OK.
2. If the alarm has already been acknowledged, but is still displayed in the status area,
thenrsttapthestatusareatodisplaythepop-up,andthenacknowledgewithOK.
Somedevicealarmsarecongurable:
Alarm Meaning Description Range Indication
OVP
OverVoltage
Protection
Triggers an alarm if the DC output voltage exceeds the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 V...1.1*U
Nom
Display, analog
IF, digital IF
OCP
OverCurrent
Protection
Triggers an alarm if the DC output current exceeds the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 A...1.1*I
Nom
Display, digital
IF
OPP
OverPower
Protection
Triggers an alarm if the DC output power exceeds the
denedthreshold.TheDCoutputwillbeswitchedoff.
0 W...1.1*P
Nom
Display, digital
IF
Thesedevicealarmscan’tbeconguredandarebasedonhardware:
Alarm Meaning Description Indication
PF Power Fail
AC supply over- or undervoltage. Triggers an alarm if the AC supply is out
ofspecicationorwhenthedeviceiscutfromsupply,forexamplewhen
switching it off with the power switch. The DC output will be switched off.
Display, digital
IF