Configure Modbus Communications - Emerson Micro Motion SGM Series Configuration And Use Manual

Integrate the meter with the control system
5.
10.6

Configure Modbus communications

ProLink III
Field Communicator Not available
Overview
Modbus communications parameters control Modbus communications with the
transmitter.
Modbus support is implemented on the RS-485 physical layer via the RS-485 terminals.
Important
Your device automatically accepts all connection requests within the following ranges:
•
•
•
•
You do not need to configure these communications parameters on the device.
Procedure
1.
2.
3.
114
Set Maximum Update Time as desired.
Maximum Update Time controls the rate at which HART Command 119 is broadcast
when event notification is not active.
• Default: 60 seconds
Device Tools > Configuration > Communications > Communications (Modbus)
Protocol: Modbus RTU (8-bit) or Modbus ASCII (7-bit) unless Modbus ASCII Support is disabled
Parity: odd or even
Stop bits: 1 or 2
Baud: 1200, 2400, 4800, 9600, 19200, 38400
Enable or disable Modbus ASCII Support as desired.
The setting of this parameter controls the range of valid Modbus addresses for your
device.
Modbus ASCII support
Disabled
Enabled
Set Modbus Address to a unique value on the network.
Set Floating-Point Byte Order to match the byte order used by your Modbus host.
Code
0
Available Modbus addresses
1–127, excluding 111 (111 is reserved to the service port)
1–15, 32–47, 64–79, and 96–110
Byte order
1–2 3–4
Micro Motion
®
Gas Specific Gravity Meters (SGM)