SMY133-SMY134-SMP133 Operating Manual
•
Rule
… specifies polarity of deviation between the control quantity and the preset limit value
for true result of the condition
•
Limit Value
… limit value of the control quantity – either in basic units or percent of nominal
value (U
NOM
/ I
NOM
/ P
NOM
)
•
Limit Hysteresis
… defines the insensibility range of the condition state evaluation
•
Block Time
… defines minimum continuous duration of appropriate magnitude of control
quantity until the condition result changes
Fig. 6.21 : I/O Setup – Measured Quantity Condition Properties
If value of the control quantity is not defined result of the condition is false.
6.2.2.3 Device State Condition
The condition can be configured to monitor various events mostly concerning the power quality
(voltage events, power failures, rapid voltage changes etc.) or some instrument state changes.
Select desired event and – if applicable – check phases to be evaluated.
With the
Control
option you can set manner of event appearance evaluation :
•
1
… if any of events
appeared
(i.e. originated during present evaluation cycle or persisted
from the previous one) result of the condition gets
true
; otherwise it gets
false
•
0→1
… if any of events
originated
during present evaluation cycle (i.e. not persisted), result
of the condition gets
true
; if no of events originated (i.e. any did not appear at all or lasted
only) it gets
false
Fig. 6.22 : I/O Setup – Device State Condition Properties
If the „0→1” control is set, all of events at all of set phases are evaluated individually and
independently on each other. For example, if an interruption on phase L1 lasted for all the
evaluation cycle and simultaneously a swell occurred on phase L2, the result of condition is
true.
For further details, see the application note
General Oscillogram Firmware Module
.
53
