Cycle Time; Cyclic Operation And Interrupts - Omron CPM2C-S100C Operation Manual

Cycle Time

7-1

Cycle Time

7-1-1

Cyclic Operation and Interrupts

Basic CPU Operation
Note
140
Initialization is performed when the power is turned ON. If there are no initial-
ization errors, the overseeing processes, program execution, I/O refreshing,
and communications port servicing are performed repeatedly (cyclically).
Startup initialization
Overseeing
processes
CompoBus/S
input refreshing
Program execution
Cycle time
calculation
CompoBus/S
output refreshing
I/O refreshing
DeviceNet
I/O refreshing
DeviceNet message
communications
RS-232C port
servicing
Peripheral port
servicing
1. The cycle time can be read using a Programming Device.
• Check hardware.
• Check memory.
• Read data from flash memory (program,
read-only DM data, and PC Setup settings).
• Check for battery error.
• Preset the watch (maximum) cycle time.
• Check program memory.
• Refresh bits for expansion functions.
• Read input data from CompoBus/S Remote
I/O Slaves.
• Execute the program.
(Refer to the Programming Manual (W353) for
details on cycle time and I/O response times.)
• Wait for minimum cycle time if a minimum
cycle time has been set in the PC Setup
(DM 6619).
• Calculate cycle time.
• Write output data to CompoBus/S Remote I/O
Slaves.
• Read input data from input bits.
• Write output data to output bits.
• Exchange I/O data with DeviceNet Master.
(
(CPM2C-S1 0C-DRT versions only)
• Perform explicit message communications
with DeviceNet Master.
(
(CPM2C-S1 0C-DRT versions only)
• Perform RS-232C port communications
processing. (Can be changed in DM 6616.)
• Perform peripheral port communications
processing. (Can be changed in DM 6617.)
Section 7-1