Siemens 7SR12 Argus - 5.3 CT Supervision (60 CTS); 5.3.1 60 CTS for 7 SR11 (60 CTS-I for 7 SR12)

7SR11 & 7SR12 Description Of Operation
Chapter 1 Page 72 of 88 ©2017 Siemens Protection Devices Limited
P.U. DELAY
D.O. DELAY
T
Counter Value 1 2
Increment
Counter
Equation Output 1
0 1 0 1
For Counter Target = 2
En = 1
Equation n
P.U. DELAY
D.O. DELAY
Counter
En = 1
Counter
= Target Value
Figure 4-4 Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off)
When the count value = En Counter Target the output of the counter (En) = 1 and this value is held until the
initiating conditions are removed when En is instantaneously reset.
The output of En is assigned in the OUTPUT CONFIG>OUTPUT MATRIX menu where it can be programmed to
any binary output (O), LED (L) or Virtual Input/Output (V) combination.
Protection functions can be used in Quick Logic by mapping them to a Virtual Input / Output.
Refer to Chapter 7 – Applications Guide for examples of Logic schemes.