FMC Technologies MPU B Series

MPU Series B
Ultrasonic Gas Flow Meter
______________________________________________________________________
_____________________________________________________________________
PRD-0000022543 Rev. 00D Page 7 of 28
MNKS008 0.0 (4/08)
2. PROTOCOL DETAILS
The MPU Series B ModBus protocol will only operate in RTU
mode.
All floating point values are represented as 32-bit real numbers in
two consecutive 16-bit ModBus registers.
All integer values are represented as 32-bit integers in two
consecutive 16-bit ModBus registers.
The MPU Series B acts as a ModBus Slave.
2.1. ModBus On Serial Port
The MPU Series B supports ModBus connections on one or both
of its serial ports.
2.1.1. Serial Port 1
The settings for this port are shown in the table below.
Baud rate 9600
Parity None
Data bits 8
Stop bits 1
ModBus node
number
1
2.1.2. Serial Port 2
The following settings are fixed for port 2:
Parity None
Data bits 8
Stop bits 1