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Fleetwatch FMS · Fuel Lane Hardware
Multi-Port DeviceMaster: Quick Troubleshooting
The Multi-Port DeviceMaster connects several RIHs to the network at once. Each RIH plugs into one of its serial ports, and the DeviceMaster passes their data to the Fleetwatch server over Ethernet. Because one unit serves several RIHs, a DeviceMaster problem usually takes several lanes offline at the same time.
When to use this guide
Several RIHs show red status LEDs or “RIH is Not Responding” in the Service Activity Monitor (SAM), or show as offline in the RIH Status tile, all at once.
Know Your DeviceMaster
Front: the PWR light shows whether the unit has power.
Back: the network lights sit between the two Ethernet ports, the serial ports connect to the RIHs, and the power cable plugs into the PWR connector.
| Light | What it tells you |
|---|---|
| PWR (front) | On = the unit has power. Off = no power reaching the DeviceMaster. |
| Network lights (back) | Red, blinking = connected to the network and passing data. Off or not blinking = no network activity. |
| Serial port lights (back) | Solid amber = the RIH on that port is online and the serial port is working. Off = check that RIH, its serial cable, or the port. |
⚠ Power cycling affects every connected RIH
All RIHs connected to this DeviceMaster lose communication while it restarts. If some lanes are still working, let fuel lane staff know before you begin.
Troubleshooting Steps
| 1 |
Is the PWR light on?
Check the PWR light on the front of the DeviceMaster.
• Off: make sure the power cable is firmly plugged into the PWR connector on the back and into a working outlet, then continue to step 2.
• On: continue to step 2.
|
| 2 |
Power cycle the DeviceMaster.
a. Unplug the power cable from the PWR connector on the back.
b. Wait at least 30 seconds.
c. Plug it back in to complete the power cycle.
Give the DeviceMaster a minute or two to start up before checking the lights again. Leave the network and serial cables connected.
|
| 3 |
Are the red network activity lights blinking?
Check the red network lights between the two Ethernet ports on the back.
• Blinking: the DeviceMaster is talking to the network. Go to step 6.
• Not blinking: continue to step 4.
|
| 4 |
Check the network cable.
Make sure the Ethernet cable is firmly seated at both the DeviceMaster and the network switch (hub). If the red network lights still don’t blink, try a known-good cable or a different port on the switch.
|
| 5 |
Check the network switch (hub).
If the network cable is good and a power cycle doesn’t bring the DeviceMaster back online, the network switch could be causing the outage. Check that the switch has power and that its port lights are on.
The switch may serve other equipment too. Check with your IT or network team before power cycling it.
|
| 6 |
Check the serial port lights, then confirm in SAM.
At the DeviceMaster, the amber light next to each serial port with an RIH connected should be solid. If one is off, the problem is likely that RIH, its serial cable, or that port.
Then log into Data Tools, open the Service Activity Monitor (SAM), and check every RIH connected to this DeviceMaster.
• Working: three solid green status LEDs and “Communication Established.”
• Still not working: red LEDs or “RIH is Not Responding.” Contact Fleetwatch Support.
|
Quick Reference
| What you see | Likely cause |
|---|---|
| PWR light off | No power: loose power cable, unplugged adapter, or dead outlet |
| PWR on, red network lights not blinking | DeviceMaster locked up (power cycle), or a network cable or switch problem |
| Cable is good, power cycle doesn’t help | The network switch (hub) may be causing the outage |
| Network lights blinking, but a serial port’s amber light is off and that RIH is offline | Likely a problem with that RIH or its serial cable, not the DeviceMaster |
Still not communicating? Contact Fleetwatch Support.