Exclusive Or Function Block (Xo); Set-Reset Function Block (Sr) - ABB REL 501-C1 2.5 Technical Reference Manual

6.9
6.10
Configurable logic blocks (CL1)

Exclusive OR function block (XO)

The exclusive OR function XOR is used to generate combinatory expressions with boolean vari-
ables. The function block XOR has two inputs and two outputs. One of the outputs is inverted.
The output signal is 1 if the input signals are different and 0 if they are equal.
XO01-
XOR
INPUT1 OUT
INPUT2 NOUT
xx00000165.vsd
Table 52: Input signals for the XOR (XOnn-) function block
Signal
INPUT1
INPUT2
Path in local HMI: ServiceReport/Functions/XORn
Table 53: Output signals for the XOR (XOnn-) function block
Signal
OUT
NOUT

Set-reset function block (SR)

The Set-Reset (SR) function is a flip-flop that can set or reset an output from two inputs respec-
tively. Each SR function block has two outputs, where one is inverted.
SR01-
SR
SET OUT
RESET NOUT
xx00000166.vsd
Table 54: Input signals for the SR (SRnn-) function block
Signal
SET
RESET
Path in local HMI: ServiceReport/Functions/SR
Description
Input 1 to XOR gate
Input 2 to XOR gate
Description
Output from XOR gate
Inverted output from XOR gate
Description
Input to SR flip-flop
Input to SR flip-flop
Chapter 3
Common functions
49