Applicable Systems
Electra Saver
Symptoms
Electra Saver PLC has lost communication with the optional remote monitoring gateway. Local compressor operation continues normally; remote monitoring and email alerts are unavailable.
Possible Causes
- Ethernet cable disconnected or damaged between the PLC communication module and the network switch
- IP address conflict or subnet mismatch after a network change
- Gateway firmware incompatible with the PLC program version
- Firewall blocking outbound ports 80, 443, or 502 required for cloud communication
Troubleshooting Steps
- Step 1: Check the link and activity LEDs on the PLC Ethernet module and the switch port
Re-seat the RJ45 connector and swap with a known-good Cat5e cable - Step 2: Access the PLC program and verify the IP address, subnet mask, and gateway settings
Ensure the IP is unique on the network and in the same subnet as the gateway - Step 3: Check the gateway firmware version and compare to the PLC program revision notes
Update the gateway firmware via USB or network if a version mismatch is found - Step 4: Test connectivity to the cloud server by pinging the gateway URL from a PC on the same network
Open firewall ports 80, 443, and 502 outbound if pings succeed but cloud registration fails
How to Reset
Reset: Once the network link is restored, the PLC auto-reconnects to the gateway within 2 minutes. No manual reset is required on the compressor.
Common Replacement Parts
- GD-1040: Ethernet communication module (For Allen-Bradley MicroLogix, 1761-NET-ENI equivalent)
- GD-1041: Remote monitoring gateway (Cellular/Ethernet dual-mode, with antenna kit)
- GD-1042: Industrial Ethernet cable, 5 m (Cat6, shielded, with strain relief)
Frequently Asked Questions
- Q: Does the compressor stop if remote monitoring fails?
No. The compressor continues running with local pressure control. Only remote visibility and alerts are affected.
- Q: What data does the gateway send?
Run status, pressure, temperature, running hours, alarm history, and energy consumption. Data is sent every 5 minutes via HTTPS.
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Source: Gardner Denver Electra Saver II Remote Monitoring Guide, GD-ESA-II-RM
Category: Compressor
Published: 2026-11-03
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