B&B Electronics manual MES1A Serial Interface, MES1B Serial Interface

Configuring the MES1A/B

The MES1A/B must be configured to use the same protocol used by the attached Modbus device.

To configure the type of Serial Protocol

27.At the Serial Protocol (1=Modbus/RTU 2=Modbus/ASCII)

(1) prompt

o To keep the current setting, press Enter o To select Modbus/RTU, type 1

o To select Modbus/ASCII, type 2

28.To accept changes, press Enter

Serial Interface

Serial Interface parameters include the type of interface and the data rate/format of the data. The MES1A/B must use the same type of interface and serial parameters as that of the Modbus device it is connected to.

MES1A Serial Interface

Since the MES1A is designed with an RS-232 interface, its default Interface Type is RS-232.

Although RS-422/485 four-wire and RS-485 two-wire options are given in the configuration menu, reconfiguring the MES1A for anything other than RS-232 will prevent the device from operating correctly.

MES1B Serial Interface

The MES1B is designed with an RS-422/485 interface and can be configured for four-wire operation or two-wire operation.

Although RS-232 option is provided in the configuration menu, reconfiguring the

MES1B for RS-232 will prevent the device from operating correctly.

To configure Interface Type parameters:

29.At the Interface Type (1=RS232 2=RS422/RS485+4-wire 3=RS485+2-wire) (3) prompt:

o To keep the current setting, press Enter

o To select RS-422/RS-485 four-wire, type 2 o To select RS-485 two-wire, type 3

Manual Documentation Number: MES1A/MES1B-2106m PN7138-rev001

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.comB&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com

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