Omron CJ - PROGRAMMING MANUAL 12-2009 - Page 196

156
Block Programming Instructions
Section 3-30
LOOP
LOOP
809
--- Block program
Required
LEND
LEND
810
LEND (810) LEND(810) or LEND(810) NOT specifies the end of the loop. When
LEND(810) or LEND(810) NOT is reached, program execution will loop
back to the next previous LOOP(809) until the operand bit for
LEND(810) or LEND(810) NOT turns ON or OFF (respectively) or until
the execution condition for LEND(810) turns ON.
Block program
Required
LEND
LEND
810
LEND (810)
B
B: Bit operand
Block program
Required
LEND NOT
LEND NOT
810
LEND(810) NOT
B: Bit operand
LEND(810) or LEND(810) NOT specifies the end of the loop. When
LEND(810) or LEND(810) NOT is reached, program execution will loop
back to the next previous LOOP(809) until the operand bit for
LEND(810) or LEND(810) NOT turns ON or OFF (respectively) or until
the execution condition for LEND(810) turns ON.
Block program
Required
Instruction
Mnemonic
Code
Symbol/Operand FunctionS Location
Execution condition
Loop repeated
Execution condition
Execution
condition
ON
Execution
condition
OFF
Execution
condition
OFF
Execution
condition
OFF
LOOP(809) designates the beginning of the loop program.
Loop repeated
Note
The status of the operand bit would be
reversed for LEND(810) NOT.
Operand
bit ON
Operand
bit OFF
Operand
bit OFF
Operand
bit OFF
If the operand bit is OFF for LEND(810) (or ON for LEND(810) NOT),
execution of the loop is repeated starting with the next instruction after
LOOP(809). If the operand bit is ON for LEND(810) (or OFF for
LEND(810) NOT), the loop is ended and execution continues to the
next instruction after LEND(810) or LEND(810) NOT.