Emerson Micro Motion 1600 - 9.2 Configure Modbus communications

Option Description
Falling • When the specified process variable is above Trigger Level, the burst message is sent
at Default Update Rate.
• When the specified process variable is below Trigger Level, the burst message is sent
at Update Rate.
Rising • When the specified process variable is below Trigger Level, the burst message is sent
at Default Update Rate.
• When the specified process variable is above Trigger Level, the burst message is sent
at Update Rate.
Windowed This option is used to communicate that the process variable is changing rapidly. Trigger
Level defines a deadband around the most recently broadcast value.
• If the process variable stays within this deadband, the burst message is sent at
Default Update Rate.
• If the process variable moves outside this deadband in either direction, the burst
message is sent at Update Rate.
On Change • If any value in the burst message changes, the burst message is sent at Update Rate.
• If no values change, the burst message is sent at Default Update Rate.
3. Set Trigger Level to the value of the process variable at which the trigger will be activated.
4. Set Default Update Rate (or Base Burst Rate) to the burst interval to be used when the trigger is not
active.
5. Set Update Rate (or Triggered Burst Rate) to the burst interval to be used when the trigger is active.
9.2 Configure Modbus communications
Display
Menu → Configuration → Inputs/Outputs → Channel A
ProLinkIII Device Tools → Configuration → Communications → Communications (Modbus)
Field Communicator Device Settings → Inputs/Outputs → Channels → Channel A
Modbus communications parameters control Modbus communications with the transmitter.
This applies to transmitters ordered with hardware board code M.
Restriction
If you need to configure all Modbus parameters, you must use ProLinkIII. The display does not provide access
to Modbus ASCII Support or Additional Communications Response Delay. The Field Communicator provides
access only to Modbus Address.
Modbus support is implemented on the RS-485 physical layer via Channel A.
Important
Your device automatically accepts all connection requests within the following ranges:
• Protocol: Modbus RTU (8-bit) or Modbus ASCII (7-bit) unless Modbus ASCII Support is disabled
• Parity: none, odd, or even
• Stop bits: 1 or 2
• Baud: 1200, 2400, 4800, 9600, 19200, 38400
Configuration and Use Manual Configure digital communications
MS-00809-0200-1600 May2024
Configuration and Use Manual 117