Omron CP1E - INTRODUCTION User Manual

A
Appendix
A-3 Inner Workings of CP1L/CP1E
118 SYSMAC CP1L/CP1E Introduction Manual
■Cycle Time
CPU units process data in cycles starting with Overseeing processes and ending
with Peripheral services.
●Calculating Cycle Time
The cycle time is calculated as the sum of the following processing times.
Cycle Time = Overseeing Processes + Program Execution + (Cycle Time
Calculation) + I/O Refresh + Peripheral Services
Overseeing Processes
Program execution
For details, refer to SECTION 4 Instruction Execution Times and Number of Steps
of CP Series CP1H/CP1L CPU Unit Programming Manual (W451) or SECTION 3
Instruction Execution Times and Number of Steps of CP Series CP1E CPU Unit
Instructions Reference Manual (W483).
Cycle Time Calculation
I/O Refreshing
For details on I/O refresh time, refer to 2-7 Computing the Cycle Time of CP Series
CP1L CPU Unit User’s Manual (W462) or SECTION 4 Monitoring and Computing
the Cycle Time of CP Series CP1E CPU Unit Instructions Reference Manual
(W483).
Details Processing Time and
Variation Factors
Checks I/O buses.
Checking of user program memory, battery error, etc.
0.4ms
Details Processing Time and
Variation Factors
Processes program execution (execution of instructions). The
processing time is the sum of individual instruction execution times.
Sum of instruction
execution times
Details Processing Time and Variation Factors
Waits for the specified cycle time to
elapse when a minimum (fixed) cycle
time is specified in PLC Settings.
Calculates the cycle time.
When the cycle time has not been fixed, the
processing time is approximately 0.
Additional time for fixing the cycle time =
Fixed cycle time – Actual cycle time
(processing time for: overseeing processes + program
execution + I/O refreshing + peripheral services)
Details Processing Time and
Variation Factors
CP-series Expansion I/O Units and
Expansion Units
Each unit is refreshed.
Outputs (from the CPU unit to
the expansion units) are
refreshed first, followed by the
inputs (from the expansion
units to the CPU unit).
I/O refresh time for
each unit is multiplied
by the number of
units used

Omron CP1E - INTRODUCTION Specifications

General

Brand	Omron
Model	CP1E - INTRODUCTION
Category	Controller
Language	English