Omron CQM1H - PROGRAM User Manual

474
CPU Unit Operation Section 7-1
7-1 CPU Unit Operation
Operation Flowchart The overall flow of CQM1H operation is as shown in the following flowchart.
The time required to execute one cycle of CPU Unit operation is called the
cycle time.
Power application
Transfer contents of
Memory Cassette to CPU
Unit.
Clear IR, SR, AR areas;
preset timers; and check
I/O Units, Inner Boards and
Communications Units
Check hardware and
Program Memory.
Check OK?
Preset cycle time
monitoring time.
Execute user's program.
End of program?
Check cycle time setting.
Minimum
cycle time?
Wait until minimum cycle
time expires.
Compute cycle time.
Refresh input bits and
output terminals.
Service RS-232C port.
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 RS-
232C interface.
Service
peripheral port.
Cycle
time
Is DIP switch
pin 2 ON?
OFF
ON
No
Ye s
No
Ye s
Ye s
Service Inner Boards
with control functions.
(See note 1.)
Service Inner Boards with
communications functions
(See note 2.)
Service Communications
Unit.
Service Inner
Boards (com-
munications)
Service
Communications
Unit

Omron CQM1H - PROGRAM Specifications

General

I/O Capacity	Up to 512 points
Power Supply	100 to 240 VAC, 50/60 Hz or 24 VDC (depending on model)
Instruction Set	Basic and advanced instructions
Operating Temperature	0 to 55°C
Program Capacity	7.2K to 15.2K steps
Communication Ports	RS-232C
Expansion Slots	Up to 3 expansion units
Type	Programmable Logic Controller (PLC)
CPU Type	RISC
Program Memory	7.2K to 15.2K steps
I/O Points	512 max
Expansion Capability	Up to 3 expansion units
Data Memory	RAM (battery backup)