5
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Function description
Wieland Electric GmbH | BA001052 (Rev. A) | 11/2018
16
Parameter
Name
Description
E1
Backup
Power failure on the line happens. System enters backup
mode.
E2
Automatic PC shutdown
The user software sends a shutdown command to the PC.
Optionally: a task is called before shutdown.
E3
Unexpected PC shut-
down
The PC shutdowns in an unexpected way, for example
caused by OS crash.
E4
PC restart
The UPS module detects the PC being OFF because the
output current was lower than Ioff current threshold for T4
time. As a consequence, the UPS module generates an
ON->OFF->ON cycle on its output.
T1
PC shutdown delay
User settable (see no. 36 in section 6.2). Time between
start of backup and start of PC shutdown procedure.
T2
PC shutdown time
User settable (see no. 37 in section 6.2). Time between
start of shutdown procedure and output voltage OFF. This
time must be set longer than the maximum time the PC
takes to complete the shutdown.
T3
PC restart minimum
OFF
time
User settable (see no. 38 in section 6.2). T3 is the delay
used between the return of the input voltage and the acti-
vation of the output. The same time is used by the auto-
matic restart function as power OFF time to restart the PC.
The value must be big enough for the PC to detect the
supply ON->OFF->ON cycle to restart.
T4
PC
OFF
detection timer
User settable (see no. 40 in section 6.2). Minimum time at
which the output current must be below the Ioff current
threshold to trigger the automatic PC restart (PC supply
ON->OFF->ON cycle).
Ioff
PC
OFF
detection cur-
rent threshold
User settable (see no. 39 in section 6.2). Current threshold
used to detect PC OFF status. This value must be lower
than the minimum PC current consumption when this is
ON.
Table 1 Shutdown and restart
The parameters are settable through the UPS module user interface or using the user software. The
checkbox "Run on startup" must be checked in the user software when PC shutdown function is used.
To inhibit the software from calling the shutdown command, the user can select the "Inhibit shutdown"
check box.
5.1.6
Cold start
The cold start is a procedure that allows turning ON the UPS without the input power. This procedure is
used to turn ON the UPS to operate during a power interruption. This practice is also a method to see if
the battery connected to the UPS module is functional.
In cold start the UPS module will remain ON for at least 60 seconds independently from the battery
voltage (even when being under the deep discharge threshold), the inhibit input and the backup timer.
After the first 60 seconds the device stays ON until the battery is not deep discharged, the backup timer
is not expired or the inhibit input is not active.
When cold started, the "Cold start" text is written beside the input icon on the status screen.
If the input supply returns during cold start, the device reverts to normal operation.
To cold start the device the user has the following options:
•
From front panel:
Press and hold simultaneously the and buttons until you see the welcome
message on the screen.
•
Remotely through inhibit input:
When enabled on the user setting (see no. 32 in section 6.2),
the device can be cold stared toggling the inhibit status from true to false.
