The function can operate on instant or time-delayed mode.
The operational logic consists of the following:
• input magnitude processing
• threshold comparator
• two block signal check
• time delay characteristics
• output processing.
The inputs for the function are the following:
• operating mode selections
• setting parameters
• digital inputs and logic signals
• measured and pre-processed frequency magnitudes.
The function outputs the START, TRIP and BLOCKED signals which can be used for direct I/O
controlling and user logic programming. The function generates general time-stamped ON/OFF events
to the common event buffer from each of the three (3) output signal. In the instant operating mode the
function outputs START and TRIP events simultaneously with an equivalent time stamp. The time stamp
resolution is 1 ms. The function also provides a resettable cumulative counter for the START, TRIP and
BLOCKED events.
The following figures present simplified function block diagrams of the frequency function.
Figure. 5.3.15 - 146. Simplified function block diagram of the f> function.
A
AQ
Q-F215
-F215
Instruction manual
Version: 2.04
208