Power Failure Monitoring (Uvo) - Siemens SIMOCODE pro System Manual

10.6

Power failure monitoring (UVO)

Description
The "Power Failure Monitoring (UVO)" function block is activated via the
plug. This is carried out via an external voltage relay that is connected to the
function block via the binary inputs of SIMOCODE pro.
Process (see process diagram below).
1) All contactors (QE) are immediately deactivated after response by the
monitoring relay/activation of the input (UVO).
2) The motor will be switched back to its previous status if the voltage returns
within the "power failure time". This can either take place immediately or can
be additionally delayed (restart time delay).
3) If the "power failure time" expires before the voltage returns, the device
signals a fault (UVO fault):
Prerequisite: The SIMOCODE pro control voltage is buffered and not
interrupted.
Schematic
The following schematic shows the "Power Failure Monitoring (UVO)"
function block
Fig. 10-6: Schematic of the "Power Failure Monitoring (UVO)" function block
1)
UVO
2)
QE
3)
Fault
Fig. 10-7: Power failure monitoring (UVO) process diagram
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
UVO
Input*
Type
Power failure time
Restart time delay
Power failure Power failure
time time
Standard functions
Trip -
Power failure (UVO)
*Activation
External power failure monitoring
Fault
t
t
t
10-15