How To Connect an Ecotap Master-Slave Grid to Edge

Edge supports the legacy LMS/Ecotap protocol, enabling Ecotap master-slave configurations to connect via a single Ethernet interface on the master controller. Other controllers communicate through the master over the existing CAN bus.

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4.2 controllers require an Ethernet module; 5.0 controllers include one by default. Supported firmware versions: 4.2 controllers require firmware 27.58 or 27.59 — other versions may cause grid malfunction. 5.0 controllers are not officially supported.

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This guide assumes an existing operational master-slave grid. New installations should connect each chargepoint individually using Ethernet.

Step 1: Master Parameter Set Changes

Set Primary host name to: edge.lan
Set Protocol channel to: Ethernet
Enable Force this EVC to be master: True

Step 2: Master and Slave Parameter Set Changes

Heartbeat timeout (minutes): 10
Active status update interval (sec): 30
Use online card check: true
Send online EVC status notifications: true
Send active updates in idle: true
Disable local powergrid: true

Step 3: Slave Parameter Set Changes

Heartbeat timeout (minutes): 10

Step 4: Optional Watchdog Settings

Configure these to stop grid operation when Edge connection fails:

Enable watchdog: true
Watchdog timeout: 30 seconds or higher

Step 5: Save and Deploy

Save parameter sets and transmit to chargepoints.

Step 6: Edge Connection

Step 7: AES-Key Configuration

When the master chargepoint connects, Edge displays a notification requesting the AES-key.

Step 8: Retrieve Communication Key

Search for the station in EVC-net to copy the Communication-key. If unavailable, the station may still be part of the old network — remove it via the network tab in EVC-net.

Step 9: Apply Key and Restart

Copy the AES-key, paste it into the notification where the missing AES-key was prompted

Step 10: Restart the chargers

This is required re-sync all the communication with Edge. Keep an eye on any remaining notifications in Edge to see if everything is going well