B&B Electronics MES1A - Manual (Page 36)

Configuring the MES1A/B
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.com
B&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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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