HART to RediGate Master

Example 1: Polling HART PV Values with the RediGate

1. Confirm that the HART modem is properly connected to the RediGate and your HART network – the leads on the modem should be placed across the 250 ohm resistor of the HART circuit:
   1. (TANDY TO ADD NETWORK DRAWING HERE)
2. Using ACE, open the default config you used in the "Getting Started Guide."
3. Download the Elecsys-HART-Demo.xml from the http://redigate.elecsyscorp.com site and open the downloaded .xml file within the same ACE window as your "Getting Started Guide" configuration.

   1. You will need to extract the .xml file from the .zip file you downloaded from the website. By default, ACE stores configuration files in the Documents\Elecsys\ACE\CFG folder, but you can store the configuration in any file location accessible by the ACE program.

   2. You cannot copy/paste nodes unless both configurations are open within the same instance of ACE. You can use the "Tile" buttons to have the windows automatically size themselves within the ACE program:
      

      
      

4. Delete the existing Master Channels → "Internal Channel 15" object.

5. Copy and paste the following objects from the HART-to-RediGate.xml  config into the configuration you created in the "Getting Started" guide:
   

   1. Internal Channel 14 (??)

   2. Internal Channel 15 (delete existing channel first)

   3. Channel 00 for HART

   4. HART Commands

   5. Report 0

   6. Report 3

   7. Modbus Slave Channel 0
   8. OpenModbus Slave Channel 2
      

6. Edit your COM2 object to match the serial settings of your HART modem:
   Baud Rate: 1200
   Parity: Odd
   Word Length: 8 Bits
   Stop Bits: One
   Rx Buffer Size: RS-232
   Warm Up Time: 5
   Warm Down Time: 5
   

7. Edit "Channel 00 for HART" properties to match the settings of your particular HART device: (?? need new screen capture)

   

   
   

8. Save and upload the configuration to the RediGate (File → Upload XML to Device)

   

   
   

9. Connect to the RediGate's MMI and check Diagnostics option 9 to determine which HART device(s) are polling successfully:
   

   1. In the above screenshot, the HART device with short address 3 is the only device being polled successfully because it is the only device on the network

10. PV values for each device are stored in RTDB registers 42002-42006, so to view those values, perform an RTDB data dump on the address of the HART device
    1. Options 3 → 18 → 0 → (address of HART device, in this example it is 3, but that well vary) → 42001 → 6 → F
       

The values displayed in the RTDB dump should correspond to the PV values in the HART transmitter. For more advanced configuration options, please see the Protocol_HART-Master documentation. To connect your HART data to an IoT platform via MQTT, visit the IIoT Platform Quick Starts page. To setup the RediGate as a Modbus slave device, proceed to "Example 2" below.

Example 2: Polling HART PV's as Modbus Values

The “HART device scanner” configuration includes a network Modbus channel (IP port 3040 for encapsulated Modbus, or port 502 for Open Modbus/TCP).  This allows a Modbus host system to read HART data from the RediGate. All Modbus slaves are set to report 32-bit data as pairs of 16-bit registers, but they can be configured to respond with 32-bit registers.

The table below outlines how the RediGate maps the HART values to Modbus slave addresses:

There are two Modbus slave devices defined in the configuration:

1. HART device information from one device.  Channel 0, device 1 is specified by default.  To see device data for a different HART device, modify the configuration for “Modbus NetSlave unit 1”, and/or “OpenModbus Slave unit 1”.  Or, add a similar Slave Attach object pointing to a different Channel/RTU and using a different Modbus slave address. See the table under Modbus Map for a list of Modbus registers to use for device values. Note that the data for commands other than CMD00 will only appear in these registers upon request through the Custom Report #3 (see Diagnostics via MMI) or by writing the poll index value to the Command Register.

2. Communication status values for all HART devices (0=failed, 7=good comms)

   1. 30001-30016 Status for COM1, HART devices 0-15

For more information on configuring the RediGate as a Modbus slave, see Modbus TCP Slave Configuration and RediGate Configuration Manual  (Modbus Network Slave Channel)