Siemens 7SR105 Rho, User Manual

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7SR105 Rho Description of Operation
©2018 Siemens Protection Devices Chapter 1 Page 47 of 57
5.2 User Logic
5.2.1 Quick Logic
The ‘Quick Logic’ feature allows the user to input up to 4 logic equations (E1 to E4) in text format. Equations can
be entered using ReyDisp or at the relay fascia.
Each logic equation is built up from text representing control characters. Each can be up to 20 characters long.
Allowable characters are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Digit
( ) Parenthesis
! ‘NOT’ Function
. ‘AND’ Function
^ ‘EXCLUSIVE OR’ Function
+
‘OR’ Function
E n Equation (number)
F n
Function Key (number)
‘1’ = Key pressed, ‘0’ = Key not pressed
I n Binary Input (number)
‘1’ = Input energised, ‘0’ = Input de-energised
L n LED (number)
‘1’ = LED energised, ‘0’ = LED de-energised
O n Binary output (number)
‘1’ = Output energised, ‘0’ = Output de-energised
V n Virtual Input/Output (number)
‘1’ = Virtual I/O energised, ‘0’ = Virtual I/O de-energised
When the equation is satisfied (=1) it is routed through a pick-up timer ( En Pickup Delay ), a drop-off timer ( En
Drop-off Delay ), and a counter which instantaneously picks up and increments towards its target ( En Counter
Target ).
P.
U.
DELAY
D.O
. DELAY
T
Counter Value 1 2
Increment
Counter
Equation Output 1 0 1 0 1
For Counter Target = 2
E n = 1
Equation n P.U. DELAY D.O. DELAY Counter E n = 1
Counter
= Target Value
Figure 5-3 Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off)