Omron E5EC Communications Manual

1 Communications Methods
1 - 2
E5@C Digital Temperature Controllers Communications Manual (H175)
1-1 Overview of Communications
Methods
The program for the communications functions is created on the host (personal computer, PLC, or
other type of communications master), and the E5@C's parameters are monitored or set from the host.
Therefore, the description provided here is from the viewpoint of the host.
CompoWay/F is OMRON's standard communications format for general serial communications. This
format uses a standard frame format as well as the well-established FINS* commands used for
OMRON's PLCs. Therefore, it can simplify communications between components and the host.
* FINS (Factory Interface Network service)
The FINS protocol provides message communications between controllers in OMRON FA networks.
Modbus is a standard communications control method that conforms to the Modicon Company's
RTU-mode Modbus Protocol (PI-MBUS-300 Revision J). Modbus is a registered trademark of
Schneider Electric.
It supports functions equivalent to the CompoWay/F Read Variable Area, Write Variable Area, Opera-
tion Command, and Echoback Test functions.
The E5@C supports the following communications functions.
• Reading/writing of parameters
• Operation instructions
• Selection of setup levels
Communications are subject to the following condition:
• Parameters can be written only when the Communications Writing parameter is set to ON (enabled).
1-1-1 Introduction
1-1-2 Communications Specifications
Transmission line connection RS-485: Multidrop
Communications method RS-485 (2-wire, half-duplex)
Synchronization method Start-stop synchronization
Communications baud rate * 9,600, 19,200, 38,400 or 57,600 bps
Communications code ASCII
Communications data length * 7 or 8 bits
Communications stop bits * 1 or 2 bits
Error detection
Vertical parity (none, even, or odd) *
BCC (Block Check Character) with CompoWay/F
communications
CRC-16 (Cyclic Redundancy Check 16) with Modbus
communications
Flow control None
Interface RS-485
Retry function None
Communications buffer 217 bytes
Send data wait time 0 to 99 ms, default time: 20 ms

Omron E5EC Specifications

General

Brand	Omron
Model	E5EC
Category	Temperature Controller
Language	English