Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 379

Computing the Cycle Time
Parallel Processing Mode
Set error flags.
Flashing:
Non-fatal
ERR/ALM error
indicator lit or
flashing
Lit: Fatal error
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.
Power ON
Peripheral
Servicing Cycle
Check user program
memory, etc.
Check OK?
Services
peripherals.
Section 9-4
343