Omron E5CN Manual

Overview
1.1 Overview of Communications Methods
1-3
■ Communications Specifications
Note: Communications speed, data bits, stop bits and vertical parity can each
be set independently in the communications setting level. Highlighted values
indicate default settings.
■ Transmission Procedure
When the host computer transmits a command frame, the E5CN transmits a
response frame that corresponds to the command frame. A single response
frame is returned for each command frame. The following diagram shows the
operation of the command and response frames.
Transmission line con-
nection
RS-485: Multidrop
Communications method RS-485 (2-wire, half-duplex)
Synchronization method Start-stop synchronization
Communications baud
rate (See note.)
1,200, 2,400, 4,800, 9,600, 19,200 or 38,400 bps
Communications code ASCII
Communications data
bits (See note.)
7 or 8 bits
Communications stop
bits (See note.)
1 or 2 bits
Error detection Vertical parity (none, even, or odd)
FCS (Frame Check Sequence) with SYSWAY
communications
BCC (Block Check Character) with CompoWay/F
communications
CRC-16 (Cyclic Redundancy Check 16) with Mod-
bus communications
Flow control None
Interface RS-485
Retry function None
Communications buffer 40 bytes
Communications
response wait time
0 to 99 ms, default time: 20 ms
E5CN
Command frame
Command frame
Response frame
Host computer
Allow a wait time of at least 2 ms before the next command is sent after the host
computer receives a response from the E5CN.

Omron E5CN Specifications

General

Brand	Omron
Model	E5CN
Category	Temperature Controller
Language	English