Page 12
MR-REF & MR-REF3 Technical Manual
Issue 3, November 2013
6.4. Serial Settings.
This
screen
allows
the
configuration
of
the
communication ports.
Serial Enabled / Disabled.
This setting allows the user to enable the MR-REF & MR-REF3 serial communications port. This setting must be set
to ‘Enable’ if communication with the relay through any serial link is required.
Feeder Number.
This setting range 1 to 32, with a default setting of 1, identifies the MR-REF & MR-REF3 unit to the Xcell unit (or any
Master device connected to the Data highway) to which the RS485 port is connected. When updating firmware the
auto program mode requires the drive number to be 1.
RS485 Baud Rate.
This setting allows the user to configure the appropriate communications baud rate such that the MR-REF & MR-
REF3 can communicate effectively on the Data Highway to which it is connected.
RS485 Protocol.
The RS485 serial communications port may be configured to operate using a slave implementation of Modbus
RTU® or P&B’s own protocol “P&B Standard”.
RS485 Parity.
This setting allows the user to set the parity to match that of the host system on the serial link. The options are
“Odd”, “Even” and “None”.
RS232/USB Baud Rate.
This setting allows the user to configure the baud rate for the front mounted RS232/USB port.
RS232/USB Protocol.
The RS232/USB serial communications port may be configured to operate using Modbus RTU® or P&B’s own
protocol “P&B Standard”.
RS232/USB Parity.
This setting allows the user to set the parity to match that of the host system on the serial link. The options are
“Odd”, “Even” and “None”.
Serial Delay.
The MR-REF & MR-REF3 may be configured to respond to a request for information from the serial port instantly or
after a designated delay.
A communications delay may be beneficial to ensure the Master device on the Data Highway receives all
information sent back by the MR-REF & MR-REF3 without enduring data collisions on the network.
Serial Settings
Y
Top
Serial
Y
N
Enabled
Summary of Contents for MR-REF
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