BECKHOFF DK9122-0311-0026 User Manual

Industrial PC
Application Note DK9122-0311-0026
Monitoring and diagnosis
Keywords
1-second UPS UPS Non-interruptible Power supply Power failure Save data C6915 CX5000 CP77xx CP62xx
1-second UPS: Securing important data in case of power failure
This application example describes the advantages of using UPS-assisted Industrial PCs on the basis of
three exemplary applications. As an ‘on-board UPS,’ the capacitor-assisted 1-second UPS from Beckhoff is
very compact, inexpensive and maintenance-free due to the low power consumption of the Intel® Atom™
based motherboard. If a UPS of several minutes duration is not needed, the capacitor performance is
sufficient in many applications to save important data before the IPC switches itself off.
Uninterruptible power supply (UPS)
In the event of a power failure, a UPS creates time for saving important data from the main memory to non-volatile memory.
Depending upon the version, a UPS bridges the power supply for a longer period. External rechargeable battery packs installed
close to the PC are often used.
On-Board-USV
Due to the low power consumption of the Intel® Atom™ based motherboard, Beckhoff offers an ‘on-board UPS’ that is very
compact, inexpensive and maintenance-free. Since the ‘1-second UPS’ is also fully integrated into TwinCAT, the customer
has the same advantages as with a regular UPS, but at a lower cost. The time that can be bridged varies according to the
motherboard: depending upon the board, it remains operational for several seconds following a power failure. The relevant
data must be saved during this time. It was possible to save a maximum of 128 KB data with the NOVRAM; at least 1 MB data
can now be saved with the capacitive 1-second UPS.
Areas of application of the 1-second UPS
For application notes see disclaimer on the last page
Beckhoff
New Automation Technology
1
Industrial PC
FB_S_UPS
sNetID iPLCPort iUPSPort tTimeout
ePersistentMode tRecoverTime
bPowerFailDetect
eState
eUpsMode
Application Note DK9122-0311-0026
Monitoring and diagnosis
The 1-second UPS from Beckhoff is available for the following Industrial PCs and embedded devices:
– Embedded PCs from the CX50x0 series
– Industrial PC C6915
®
– Control Panels from the CP62xx and CP77xx series with Intel
Atom™ motherboard
UPS under TwinCAT
The UPS is controlled in TwinCAT by the calling of a function block. Depending on the selected mode, the function block FB_S_
UPS initiates the storage of persistent data and/or QuickShutdown of the operating system in the event of a power failure. The
necessary library is integrated into the installation from TwinCAT 2.11 R2 Build 2016 onwards. For older TwinCAT versions, an
appropriate library must be copied into the library folder.
Fig. 1 TwinCAT function block for controlling the UPS
Behavior of the UPS: Data handling
For application notes see disclaimer on the last page
Beckhoff
New Automation Technology
2
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