Modbus Communication Settings; Figure 3: Communication Settings - LMI Excel XR Series Manual

3.2.1 Modbus Communication Settings

From the Settings screen, navigate to the Communication Settings icon and press Enter
. The Communication Settings screen (Figure 3) will allow for the following settings to
be adjusted:
The Slave Address can be configured via software in the range of 1-125.
•
The Bit Rate can be selected as 9600, 19200, 38400, 115200, or Auto. If the
•
network bit rate is known, it is recommended to manually select the bit rate. If
Auto is selected, the Excel
that cannot be read until the correct bit rate is detected. As a result, the first few
commands may fail in autobaud mode.
Parity can be configured as No Parity, Even Parity, or Odd Parity
•
• Stop Bits can be configured as 1 Stop Bit or 2 Stop Bits.
The Internal Line Termination can also be enabled/disabled on this screen. The
•
final device on the communication bus must have line termination enabled. This
can be accomplished externally or using the software enabled internal line
termination. The Internal Line Termination will engage the following internal
termination resistors:
562 Ohm between +5V and D1 (Positive Data Signal)
•
121 Ohm between D0 (Negative Data Signal) and D1 (Positive Data Signal)
•
• 562 Ohm between DGND and D0 (Negative Data Signal)

Figure 3: Communication Settings

® XR Pump will change its bit rate for each message
LOCAL OPERATION