Ports to connect to on The Attendant: BUS1 – BUS4
Ports to connect to on The Attendant Mini: BUS1 – BUS2
These devices should be powered directly from the power center or breaker panel. Do not connect this device to a relay. Do not connect any wires other than Data+ and Data- to any BUS ports on The Attendant.
Wiring/Connections
Data Communication
You will need to use a standard CAT-5 or better cable with a custom RJ45 plug layout to connect your VFD to The Attendant. Please reference the following table to make cable.
| Vacon X5 VFD RJ45 Connector | Attendant Bus Port |
| Pin 8 | D+ |
| Pin 7 | D- |
Connect the cable to The Attendant as per the diagram below
Please be careful not to connect pins 1-6 in the RJ-45 plug of the drive to The Attendant.
Digital Inputs
In order to allow the drive to operate under Modbus RTU control you must install a jumper cable between
Your wiring should look similar to the photo below:
Before you begin programming
Please note/record the following parameters values before starting programming. These are very important values that may already be configured for your pump and must be carried over into the Attendant configuration.
| Parameter | Value |
| P – 1 (Maximum Frequency / Speed Limit) | Write down to configure max Frequency/RPM |
| P – 2 (Minimum Frequency / Speed Limit) | Write down to configure min Frequency/RPM |
| P – 7 (Motor Rated Voltage) | Write down to monitor drive health in the app |
| P – 8 (Motor Rated Current) | Write down to validate speed setting |
| P – 9 (Motor Rated Frequency) | Write down to configure min RPM |
| P – 10 (Motor Rated Speed) | Write down to configure max RPM |
Configuration
To control Invertek E3 VFD drives with The Attendant you must configure the VFD to enable communication using Modbus. Settings changes on the drive are performed using the display and buttons on the unit itself. The image below depicts the display and control buttons found on all Invertek E3 drives:
In order to change parameters of the E3 drive please refer to diagram below:
Enable advanced parameters
Hold down the NAVIGATE Key for 2 seconds. Navigate to Parameter 14 and set the value to 101 (or whatever access code was previously programmed into Parameter 37). This setting enables your ability to access advanced programming parameters.
Note: Be sure to perform this step if you can’t scroll to parameters mentioned in this guide.
Note: The Parameter 14 value of 101 is the default value of the drive. It is possible for it to be changed by an installer to prevent others from making changes. The access code is stored in Parameter 37. If you don’t know this code and 101 does not work you will need to factory reset the drive.
IT IS VERY IMPORTANT THAT YOU UNDERSTAND AND WRITE DOWN ALL REGISTER VALUES PRIOR TO PERFORMING FACTORY RESET
Factory Reset Procedure: 
Note: If you are not able to modify parameters of the drive and see “Locked” displayed on the screen when you try to adjust parameters you need to perform an unlock. To do this:
Hold down the NAVIGATE Key for 2 seconds. Navigate to Parameter 38 and set the value to 0. This will unlock your drive settings.
If you wish to lock the drive after completing programming you can set Parameter 38 back to the value of 1.
Configuration for Modbus Control
Configure Modbus Communication
Please be sure to set the following parameters on the VFD to enable Modbus operation:
| Parameter | Value |
| P – 12 (Primary Command Source) | 3 Enable remote drive operation |
| P – 36 Index 1 (Serial Communications Address) | 1 (or some other number if you are connecting multiple VFD’s to a single Bus port on The Attendant) |
| P – 36 Index 2 (Serial Communications Baud) | 19200 |
| P – 36 Index 3 (Serial Communications Timeout) | t 3000 (make sure that letter T is in front of the 3000 value or the drive may not stop in case of communication loss) |