Prior to having the Hub operational the customer must undertake the following responsibilities.

Modbus Checklist

  1. Hub is installed on the network and can be seen by EMX

  2. Device(s) to be polled are on the same network as Hub (Gateway)

  3. Device(s) to be polled can be accessed i.e. IP address can be pinged without restriction

  4. Device(s) to be polled are configured to communicate Modbus

  5. Device IDs (1-255) are known for Modbus devices to be polled

  6. Device register maps are available

  7. EMX has an OPI license (provided by Packet Power)

SNMP Checklist

  1. Hub is installed on the network and can be seen by EMX

  2. Device(s) to be polled are on the same network as Hub (Gateway)

  3. Device(s) to be polled can be accessed i.e. IP address can be pinged without restriction using a MIB walk

  4. Correct SNMP version is known (1,2 or 3)

  5. SNMP Read Community is known (default is public)

  6. Device OID(s) are known

  7. Device MIBs are available

  8. EMX has an OPI license (provided by Packet Power)


Make sure the Gateway / Hub is installed and communicating with EMX. Consult the Packet Power Gateway documentation section for additional details.

Ensure that devices to be polled by the Hub are on a network that the Hub can access. This can be accomplished in part by accessing the IP address of the devices from the network where the Hub operating on. If this is not the case the Hub will not be able to access the data from the devices.

It is the responsibility of the customer to ensure that the devices to be polled by the Hub are correctly set up for communication via Modbus TCP/IP or SNMP. In the event that Packet Power is required to troubleshoot these devices or aid in the device configuration in order to facilitate communication there will be an associated hourly technical resource fee.

Provide Packet Power with details pertaining to the Modbus register map or SNMP MIB directory for the devices to be polled. If this is not readily available then provide Packet Power with the model numbers of the respective devices.  Packet Power will also require the device IDs for each Modbus device. These will range from 0-254 or 1-255 and will be configurable on the device. For SNMP devices each device will have an OID.


To verify data flow from the devices to be polled make sure that Packet Power has remote access to devices. If these devices reside on a protected network, a remote access session using an application such as Team Viewer can be used to provide a safe access window.


6. Prior to programming the Hub, the Hub / Gateway must have a Packet Power OPI license. This is an additional license that is executed by the Packet Power EMX administrator. Once the license is implemented the OPI menu will appear under the manage tab in EMX.