Exclusive Or Function Block Xor; Loop Delay Function Block Loopdelay - ABB Relion 670 Series Technical Reference Manual

1MRK 505 208-UEN B
12.1.7
12.1.8
Technical reference manual

Exclusive OR function block XOR

The exclusive OR function (XOR) is used to generate combinatory expressions
with boolean variables. 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.
XOR
INPUT1 OUT
INPUT2 NOUT
IEC04000409-2-en.vsd
IEC04000409 V2 EN
Figure 229: XOR function block
Table 289: XOR Input signals
Name Type
INPUT1 BOOLEAN
INPUT2 BOOLEAN
Table 290: XOR Output signals
Name Type
OUT BOOLEAN
NOUT BOOLEAN

Loop delay function block LOOPDELAY

The Logic loop delay function block (LOOPDELAY) function is used to delay the
output signal one execution cycle.
LOOPDELAY
INPUT
IEC09000296-1-en.vsd
IEC09000296 V1 EN
Figure 230: LOOPDELAY function block
Table 291: LOOPDELAY Input signals
Name Type
INPUT BOOLEAN
Table 292: LOOPDELAY Output signals
Name Type
OUT BOOLEAN
Default Description
0 Input 1 to XOR gate
0 Input 2 to XOR gate
Description
Output from XOR gate
Inverted output from XOR gate
OUT
Default Description
0 Input signal
Description
Output signal, signal is delayed one execution
cycle
Section 12
Logic
449