Omron E5AN Communications Manual

Modbus
SECTION 5 Modbus Communications Procedure
5-20
● Program Start
The simple program function can be reset/started with the related infor-
mation setting. The setting can be accepted in both setup area 0 and
setup area 1. An operation error will be generated if program start has
been set in the event input.
● Setting Areas
Control operation is executed in setting area 0. In this state, you can
perform operations that are permitted only during control or those that
cause no problems even if control is in progress. These operations
include reading PVs, writing SPs, and change RUN/STOP status.
Setting area 0, however, prohibits operations that affect control,
including writing data at the initial setting level. (Reading setting data is
always allowed.)
In setting area 1, control operation is stopped. In this state, you can
perform operations that are not allowed in setting area 0. These opera-
tions include writing data at the initial setting level.
At power-ON, the Temperature Controller is set in setting area 0. To
move to setting area 1, use the “move-to-setting area 1” command. To
return to setting area 0, turn the power OFF and ON again, or use the
“software reset” command.
■ Echoback Test
Command Frame
Response Frame
* When the command is executed normally, the response returns the
same data sent in the command.
(1) Test Data
Enter any 2-byte hexadecimal data.
Power ON
Software reset command
Setting area 0 Setting area 1
“Move-to-setting
area 1” command
Control in progress Control stopped.
CRC-16
11 2 2
H'08 H'00 H'00
Test data
2 bytes
Slave
address
Function
code
Write
start address
CRC-16
11 2 2
H'08 H'00 H'00
Test data
2 bytes
Slave
address
Function
code
Write
start address

Omron E5AN Specifications

General

Brand	Omron
Model	E5AN
Category	Temperature Controller
Language	English