88
5-2
The CPM1 Cycle
The overall flow of CPM1 operation is as shown in the following flowchart. The
CPM1 is initialized internally when the power is turned on. If no errors are
detected, the overseeing processes, program execution, I/O refreshing, and
Peripheral Device servicing are executed consecutively (cyclically). The aver-
age cycle time can be monitor from a Peripheral Device.
Power application
Check hardware and
Program Memory.
Check OK?
Preset cycle time
monitoring time.
Execute user program.
End of program?
Check cycle time set-
ting.
Minimum
cycle time set?
Wait until minimum cycle
time expires.
Compute cycle time.
Refresh input bits and
output terminals.
Service peripheral port.
Set error flags and
activate indicators.
ERROR or ALARM?
No
ERROR
(lit)
ALARM
(flashing)
Initialization
Overseeing
processes
Program
execution
Cycle time
processing
I/O refreshing
Service
peripheral
port.
Cycle
time
No
Yes
No
Yes
Yes
Initialization processes
Note Initialization processes include clearing the IR, SR, and AR areas, presetting
system timers, and checking I/O Units.
The CPM1 Cycle
Section 5-2
Summary of Contents for SYSMAC CPM1
Page 1: ...Cat No W262 E1 4 Programmable Controllers SYSMAC CPM1 OPERATION MANUAL ...
Page 2: ...CPM1 Programmable Controllers Operation Manual Revised February 1998 ...
Page 116: ...105 Appendix B Dimensions All dimensions are in millimeters CPM1 10CDR j 121 130 85 81 90 ...
Page 118: ...Appendix B Dimensions 107 CPM1 20EDR 81 90 171 180 85 ...
Page 119: ...Appendix B Dimensions 108 CPM1 CIF01 90 81 21 30 205 50 56 CPM1 CIF11 90 81 21 30 205 50 61 ...