2 communication setting, 2 communication setting -2 – Yokogawa RotaMASS 3-Series User Manual

Page 16

IM 01R04B08-00E-E 1st edition February 15, 2012 -00

<4. GETTING STARTED>

4-2

4.2 Communication Setting

To activate MODBUS, the following settings are required. They are located in the MODBUS Communication
menu in Detailed Setup.

Do not turn off the power supply immediately after setting. When the parameters are saved to the EEPROM,

the redundant processing is executed for the improvement of reliability. If the power is turned off within 60

seconds after setting is made, the modified parameters are not saved and the settings may return to the

previous values.

Table 4.1 Communication Parameters

Function

Parameter

Description and Setting

Device address

Select:

1 to 247

Set the device address for ROTAMASS where the
host expects to communicate. Make sure that no other
device on the bus uses the same address!

Baud rate

Select: 1200, 2400, 4800, 9600,

19200, 38400, 57600,

76800, 115200

Make sure that host and ROTAMASS use the same
baud rate for communication

Communication
settings

Data format

Select:

Even 1 stop bit, Odd 1 stop bit, None 1 stop

bit, None 2 stop bits

Make sure that host and ROTAMASS use the same
communication settings.

Bus mode

Modbus mode

Select:

RTU, ASCII

Make sure that host and ROTAMASS communicate in
the same Modbus mode.

Modbus init

IMPORTANT

The MODBUS communication module must be
restarted after changing any of the above settings!
This can be done by either powering off and on the
device or by executing the function “Modbus init”.
Please note that the settings in the menu will
be updated after initialization of the Modbus
communication module.

IMPORTANT

Connecting the ROTAMASS MODBUS communication tool to a bus with its existing host may cause
communication data scrambles resulting in a functional disorder or a system failure.

IMPORTANT