5
Input/Output Requirements The first thing that must be assessed is the number of input and output points
that the controlled system will require. This is done by identifying each device
that
is to send an input signal to the PC or which is to receive an output signal
from
the PC. Keep in mind that the number of I/O points available depends on
the
configuration of the PC. Refer to
3-3 IR Area
for details on I/O capacity and
the allocation of I/O bits to I/O points.
Next,
determine the sequence in which control operations are to occur and the
relative
timing
of the operations. Identify the physical relationships between the
I/O
devices as well as the kinds of responses that should occur between them.
For
instance, a photoelectric switch might be functionally tied to a motor by
way
of a counter within the PC. When the PC
receives
an input from a start switch, it
could
start the motor
. The PC could then stop the motor when the counter has
received a specified number of input signals from the photoelectric switch.
Each
of the related tasks must be similarly determined, from the beginning of the
control operation to the end.
Unit Requirements The
actual Units that will be mounted or connected to PC Racks must be deter
-
mined
according to the requirements of the
I/O devices. Actual hardware specifi
-
cations,
such as
voltage and current levels, as well as functional considerations,
such
as those that require Special I/O Units or Link Systems will need to be con
-
sidered.
In many cases, Special I/O Units, Intelligent I/O Units,
or Link Systems
can greatly reduce the programming burden. Details on these Units and Link
Systems
are available in appropriate
Operation Manuals
and
System Manuals.
Once the entire Control System has been designed, the task of programming,
debugging,
and operation as described in the remaining sections of this
manual
can begin.
1-6 Peripheral Devices
The following peripheral devices can be used in programming, either to input/
debug/monitor
the PC program or to interface the PC to external devices to out
-
put
the program or memory area data. Model numbers for all devices listed be
-
low
are provided
in
Appendix A Standard Models
. OMRON product names have
been placed in bold when introduced in the following descriptions.
Programming Console A Programming Console is the simplest form of programming device for OM-
RON
PCs. All Programming Consoles are connected directly to the CPU without
requiring a separate interface.
LSS
is designed to run on
IBM A
T/XT compatibles and allows you to perform all
the
operations of the Programming Console as well as many additional ones. PC
programs can be written on-screen in ladder-diagram form as well as in mnemonic
form. As the program is written, it is displayed on a display
, making confir
-
mation
and modification quick and easy
. Syntax checks may also be performed
on the programs before they are downloaded to the PC.
The LSS is available on either 5” or 3.5” disks.
A
computer running the LSS is connected to the
C200HS via the Peripheral Port
on the CPU using the CQM1-CIF02 cable.
1-7 Available Manuals
The
following table lists other manuals that may be required to program and/or
operate
the
C200HS.
Operation Manuals
and/or
Operation Guides
are also pro
-
vided
with individual Units and are required
for wiring and other specifications.
Name Cat. No. Contents
GPC Operation Manual W84 Programming procedures for the GPC
(Graphics Programming Console)
FIT Operation Manual W150 Programming procedures for using the FIT
(Factory Intelligent Terminal
Sequence, Timing, and
Relationships
Ladder Support Software:
LSS
Available Manuals Section 1-7