NB HMI direct communication with E5_C temperature controller

Hardware Setup

NB-HMI Configuration

Set the following for COM2 within the NB-Designer project

• Type: RS485
• Baud Rate: 9600 (this can be different, just make sure it is the same as the temperature controller)
• Data Bit: 8
• Parity Check: None
• Stop Bit: 1

Once this is configured, we can setup the topology within the NB-Designer project.

1. Left-click and drag HMI (Under PT tab) onto the NB-Designer area

   
   

2. Left-click and drag Serial Port connection (Under Connector tab) onto the NB-Designer area.
   
   
   
3. Left-click and drag Modbus RTU Extend (Under PLC tab) onto the NB-Designer area
   
   
4. Connect the HMI and Modbus RTU Extend units to the Serial Port cable
   
   
5. For multiple Modbus RTU Extend units (this would be E5_C units), repeat steps 2-4 to add more units
   
   
6. Finally, set each Modbus RTU Extend unit with the correct Station Number (Modbus Node Address) by double clicking on the corresponding unit.
   

E5_C Configuration

Here is a reference to the buttons available on a E5CC temperature controller, that there locations might vary based on diffreent models, but their functionality remains the same.

Using the image above as a reference, here are the steps for configuring the temperature controller communication settings

1. Go to Adjustment Level to change Communications Writing to ON
2. Move back to Operation Level by pressing the first key on the left once
3. Go to Initial Setting Level
4. Once in Initial Setting Level pres the first key on the left once to move onto Communications Setting Level
5. Here set the following parameters
   1. Protocol Setting: Mod (Modbus)
   2. Unit No.: Must be a different number for each unit
   3. Baud Rate: 9.6[9600 bps] (or the same as what you set on the NB HMI)
   4. Parity: none
6. Return to Operation Level by pressing the first key on the left for less than 1 second
7. Press the first key from the left for more than 1 second