OMRON C500-NC103-E PLC

OMRON C500-NC103-E  PLC

tional Backplane. First, though, we have to mount an I/O Control Unit to the

leftmost slot of the CPU Rack.

I/O Control Unit

Now we can use a cable to connect the CPU Rack to another Backplane.

This Backplane has a Power Supply and I/O Units mounted to it, but it has no

CPU of its own. The additional Backplane must also have an I/O Interface

Unit mounted to its leftmost position. This configuration of additional Back

plane, Power Supply, I/O Units, and I/O Interface Unit is called an Expansion

I/O Rack.

CPU Rack

Expansion I/O Rack

I/O Interface Unit

The CPU Rack and Expansion I/O Rack shown above are connected by a

cable. Remember that this whole configuration is still referred to as one PC.

It is possible to keep adding Expansion I/O Racks in this way until the maxi

mum number of I/O points for the system is reached. Each Expansion I/O

Rack needs an I/O Interface Unit.

Memory Packs

The CPU has a removable Memory Pack that stores the user program. Two

Memory Packs are available, in either RAM or ROM. You can write your own

program into the RAM Pack or you can copy a program that has already

been written to an EPROM chip and mount it in the ROM Pack. The EPROM

Chip must be mounted to the PROM Writer in order for the program to be

written to it. Then the EPROM Chip must be mounted to the ROM Pack.

Depending on the amount of memory required for your application, use 1. 2.

or 3 chips. Refer to Appendix B Specifications for specifications of the

EPROM chips.

Using the diagram and the table below as a reference, mount the EPROM

chips to the correct IC sockets

Take the following steps to install the Memory Pack in the CPU.

Turn the power to the PC OFF

Using a standard screwdriver, remove the Memory Pack compartment

cover located on the front panel of the CPU. Push in the latch on the

cover and slide the cover upward

Insert the Memory Pack (component side facing left) into the Memory

compartment. When the Unit is almost completely inserted into the CPU,

there may be a slight resistance as the Memory Pack connector mates

with the connector inside the CPU. Continue pushing on the Memory

Pack until it is inserted completely into the CPU.

Follow the steps below to remove the Memory Pack from the CPU.

Turn the power to the PC OFF.

Using a standard screwdriver, remove the Memory Pack compartment

cover located on the front panel of the CPU. Push in the latch on the

cover and slide the cover upward.

Pull the Memory Pack up and out

System Configurations

The following figure shows an assembled C500 CPU Rack and one Expan

sion I/O Rack. When three Expansion I/O Racks are connected to a CPU

Rack, a maximum of 512 I/O points are available. (Include the Remote I/O

Units)

The table below summarizes the Units that can be used in the systems de

scribed in this manual.

Special I/O Units

The number of Special I/O Units that can be used depends

upon the number of points available and the number of

points the Special I/O Unit requires.

Host Link Units

Up to one Host Link Units can be mounted. Only one

Rack-Mounting Host Link Unit can be mounted to the CPU

Rack. A CPU-Mounting Host Link Unit can also be mounted

directly to the CPU. Host Link Units cannot be mounted to

Expansion I/O Racks.

However, these Units cannot be mounted when the

SYSMAC Net Link Unit is mounted.

I/O Units

Standard I/O Units are available with 16. 32. or 64 points.

Refer to Section 2 Description of All Components for details.

Memory Packs

RAM or ROM Packs are available. The ROM Pack requires

a separately available EPROM chip.

Remote I/O Master

Unit

Up to four Remote I/O Master Units can be mounted to both

the I/O Rack and the Expansion I/O Racks. When the

Remote I/O Unit is mounted to a Rack, a Rack number must

be set so that the CPU can identify the Remote I/O Unit.

Mount the Remote I/O Slave Unit to the leftmost position

(the I/O Interface Unit position) on the Slave Rack. For

details, refer to the C500 Operation Manual.