CPU Overview

Programmable Controller

CS1

C--17

Outstanding Connectivity and Compatibility

J CS1 Offers More

More serial communications ports, more protocols. Up to 34 port connections with protocol setting for each port.

J Protocol Macros

PLCs with Protocol Macros

RS-232C

RS-232C

Non-OMRON

PLC

Non-OMRON

Temperature

Controller

CS1 PLC

Data transfer protocol for serial communications vary with the manufacturer and

with devices. Differences in protocols can make communications between devices

by different manufacturers very difficult, even when electrical standards are the

same.

OMRON’s protocol macros solve this problem by:

•

Enabling easy creation of protocol macros designed to match the protocol of a

connected device.

•

Allowing you to communicate with essentially any device having an RS-232C,

RS-422, or RS-485 port, without having to write a special communications

program.

J The Two Main Functions of Protocol Macros

I/O memory

Read

Variable R ( )

Send

Receive

Variable W ( )

Write

I/O memory

Create

Header

Address

Data

Check code

Terminator

1. Creating Communications Frames

The communications frames can be easily created

according to the specifications required by the con-

nected device. Data from I/O memory in the CPU can

be easily included as part of a communications frame

to read from or write to I/O memory.

CPU

PMCR

Port/Module

Required

processing

Connected

device

Step 0

Step n

(as required)

2. Creating Frame Send/Receive Procedures

The required processing, including sending and receiving

communications frames, can be performed one step at a

time according to the results of the previous step, and

then CX-Protocol can be used to trace send and receive

data.

J Application Examples

Standard System Protocols

Data transfers with OMRON components can be easily

performed using standard system protocols. There is no

need to develop your own protocols in this case.

CS1 PLC

Standard system protocol

Example: E5CK Temperature Controller

RS-232C

OMRON component

Example: E5CK

User-Created Protocols

Data transfers with non-OMRON components can be easily

created just by defining parameters using the CX-Protocol

Windows tool.

CX-Protocol

Creates protocols.

CD-ROM

CS1 PLC

Non-OMRON

component