Cycle Time Overview - Omron SYSMAC CS Series Operation Manual

Computing the Cycle Time
Parallel Processing Mode
Set error flags.
Flashing:
Non-fatal
ERR/ALM
error
indicator lit or
flashing
Lit: Fatal error

10-4-2 Cycle Time Overview

Normal Processing Mode
496
Checks Unit
connection status
Program Execution
Cycle
Check hardware,
etc.
Check OK?
Execute user
program (i.e., READY
cyclic tasks).
Program
NO
completed?
YES
Wait for specified
cycle time.
Calculates cycle
time.
Refreshes I/O.
Services peripherals.
The cycle time depends on the following conditions.
• Type and number of instructions in the user program (in all cyclic tasks
that are executed during a cycle, and within interrupt tasks for which the
execution conditions have been satisfied).
• Type and number of Basic I/O Units
• Number of SYSMAC BUS Remote I/O Master Units and number of I/O
points on the Slaves
• Type and number of Special I/O Units, CS-series CPU Bus Units, Inner
Boards, and type of services being executed.
• Specific servicing for the following Units/Boards
• Data link refreshing and the number of data link words for Controller
Link and SYSMAC LINK Units
Power ON
Peripheral
Servicing Cycle
Check user program
memory, etc.
Check OK?
Services
peripherals.
Section 10-4