FATEK FBs-CB2 - Chapter 3: FBs-PLC Instruction Lists; 3.1 Sequential Instructions

3-1
Chapter 3 FBs-PLC Instruction Lists
3.1 Sequential Instructions
Instruction Operand Symbol Function Descriptions
Execution
Time
Instruction type
ORG
Starting a network with a normally open (A)
contact
ORG NOT
Starting a network with a normally closed
(B) contact
0.33uS
ORG TU
Starting a network with a differential up
(TU) contact
ORG TD
X,Y,M,
S,T,C
Starting a network with a differential down
(TD) contact
0.54uS
ORG OPEN
Starting a network with a open circuit
contact
ORG SHORT
Starting a network with a short circuit
contact
0.33uS
Network
starting
instructions
LD
Starting a relay circuit from origin or branch
line with a normally open contact
LD NOT
Starting a relay circuit from origin or branch
line with a normally closed contact
0.33uS
LD TU
Starting a relay circuit from origin or branch
line with a differential up contact
LD TD
X,Y,M,
S,T,C
Starting a relay circuit from origin or branch
line with a differential down contact
0.54uS
LD OPEN
Starting a relay circuit from origin or branch
line with a open circuit contact
LD SHORT
Starting a relay circuit from origin or branch
line with a short circuit contact
0.33uS
Origin or
branch line
starting
instructions
AND
Serial connection of normally open contact
AND NOT
Serial connection of normally closed
contact
0.33uS
AND TU
Serial connection of differential up contact
AND TD
X,Y,M,
S,T,C
Serial connection of differential down
contact
0.54uS
AND OPEN
Serial connection of open circuit contact
AND SHORT
Serial connection of short circuit contact
0.33uS
Serial
connection
instructions
OR
Parallel connection of normally open
contact
OR NOT
Parallel connection of normally closed
contact
0.33uS
OR TU
Parallel connection of differential up contact
OR TD
X,Y,M,
S,T,C
Parallel connection of differential down
contact
0.54uS
OR OPEN
Parallel connection of open circuit contact
OR SHORT
Parallel connection of short circuit contact
0.33uS
Parallel
connection
instructions
ANDLD
Serial connection of two circuit blocks
ORLD
Parallel connection of two circuit blocks
0.33uS
Blocks merge
instructions