Or Function Block - ABB RELION 630 Series Technical Manual

1MRS757256 F
3.32.1.1
PML630/Compact Load-Shedding Solution
Technical Manual
• XOR
• LOOPDELAY used to delay the output signal one execution cycle
• TIMERSET has pick-up and drop-out delayed outputs related to the input
signal; the timer has a settable time delay
• AND
• SRMEMORY is a flip-flop that can set or reset an output from two inputs
respectively. Each block has two outputs where one is inverted. The memory
setting controls if the block after a power interruption should return to the state
before the interruption, or be reset. Set input has priority.
• RSMEMORY is a flip-flop that can reset or set an output from two inputs
respectively. Each block has two outputs where one is inverted. The memory
setting controls if the block after a power interruption should return to the state
before the interruption, or be reset. Reset input has priority.

OR function block

Function block
IEC09000288 V2 EN
Figure 74: Function block
Functionality
OR and OR20 are used to form general combinatorial expressions with Boolean
variables.
The default value in all input is logical FALSE, which makes it possible to use only the
required number of inputs and leave the rest disconnected.
Section 3
Basic functions
141