Instruction Variations; Execution Conditions - Omron SYSMAC CS/CJ Series Programming Manual

Basic Concepts
2-1-7

Instruction Variations

2-1-8

Execution Conditions

Non-differentiated Instructions
Non-differentiated input instruction
Input-differentiated Instructions
Upwardly Differentiated Instructions (Instruction Preceded by @)
34
The following variations are available for instructions to differentiate executing
conditions and to refresh data when the instruction is executed (immediate
refresh).
Variation
Differentiation ON
OFF %
Immediate refreshing
@
The CS/CJ Series offers the following types of basic and special instructions.
• Non-differentiated instructions executed every cycle
• Differentiated instructions executed only once
Output instructions that required execution conditions are executed once
every cycle while the execution condition is valid (ON or OFF).
Non-differentiated
output instruction
Input instructions that create logical starts and intermediate instructions read
bit status, make comparisons, test bits, or perform other types of processing
every cycle. If the results are ON, power flow is output (i.e., the execution con-
dition is turned ON).
Example
• Output Instructions: The instruction is executed only during the cycle in
which the execution condition turned ON (OFF → ON) and are not exe-
cuted in the following cycles.
(@) Upwardly-differ
entiated instruction
Symbol
@ Instruction that differentiates when the execu-
tion condition turns ON.
Instruction that differentiates when the execu-
tion condition turns OFF.
! Refreshes data in the I/O area specified by
the operands or the Special I/O Unit words
when the instruction is executed.
Instruction (mnemonic)
Differentiation variation
Immediate refresh variation
Example
Executes the MOV instruction once when
CIO 000102 goes OFF → ON.
Section 2-1
Description
@MOV