CS1D-BC042D Omron, CS1D-BC042D Datasheet - Page 377

• Manufacturer Part Number: CS1D-BC042D
• Description: CS1D Dual CPU Exp
• Manufacturer: Omron

Specifications of CS1D-BC042D

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Computing the Cycle Time
9-4
9-4-1
Normal Processing Mode
342
Computing the Cycle Time
Sets error flags
ERR/ALM indicator
ON or Flashing?
CPU Unit Operation Flowchart
ON (fatal error)
Flashing (non-
fatal error)
The CS1D CPU Units process data in repeating cycles from the overseeing
processing up to peripheral servicing as shown in the following diagram.
NO
Executes user program
(i.e., executes READY
cyclic tasks).
Resets watchdog timer
and waits until the set
cycle time has elapsed
Services Programming
Devices
Checks hardware and
user program memory
Checks Unit
connection status.
Calculates cycle
time
End of program?
Performs I/O
refreshing
Check OK?
Power ON
YES
YES
NO
I/O refreshing
Startup
initialization
Duplex
initialization
Overseeing
processing
Peripheral
servicing
Cycle time
calculation
Program
execution
Section 9-4
PLC cycle
time