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1 - RS485 Data line resistance check - ACU not responding or fails to be detected.
First power down any data line converters and disconnect any ACU’s that do not have a flashing OK LED. Using a Multimeter, measure
the resistance across the White/Green and Green pair at one end of the network. A resistance of between 60 and 80 ohms is required.
Repeat the test for the White/Orange and Orange pair. This is vital for a stable and trouble free installation.
2 - ACU Data reset - Only available for ACUs with a serial number below 1725515
- If the OK LED is flashing steadily, there should be no reason to reset the unit
- If the OK LED is not flashing, you need to clear the unit so that it can receive a firmware download from the PC
- Any other ACU’s without OK LEDs must be taken off the line or powered down
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Stop Net2 Server (Net2 server icon - Bottom right of screen - Right mouse click, Select Stop the Net2 Server).
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Power down the Net2 plus.
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Insert a link wire between the Orange (Amber LED) and Mauve/White (Media Detect) terminals on reader 2 port.
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Power up the ACU. - The OK LED flashes very quickly.
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With the unit still powered, remove the link.
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Go to the PC and Start the Net2 Server and go into the Doors screen. Click on the Detect button. This should look for the
ACU and then download its firmware (This may take up to 5 minutes).
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The OK LED should now be flashing with a steady heartbeat. This procedure must only be done for one ACU at a time.
Please note:
If this unit is using the TCP/IP interface, any fixed IP settings will be retained.
If the unit is in DHCP mode it will need to be detected at each stage using the Server Config Utility as a new address will be issued each
time the PCB resets.
3 - ACU TCP/IP reset
To reset a Net2 plus and return the unit to DHCP settings;
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Power down the Net2 plus unit
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Disconnect the reader on reader port 2
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Link the Brown (Red LED) and Mauve (Media Detect) terminals on reader port 2
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Power up the unit again and the OK LED will flash fast for a few seconds
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When the OK LED returns to a steady heartbeat, the IP settings will be reset to DHCP
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You can now remove the link
Please note:
This process will not remove any data from the ACU and will simply reset the Ethernet parameters (enable DHCP)
4 - ACU Complete reset - Only available for ACUs with serial number 1725515 and above
The steps below apply to Net2 plus ACUs running firmware version 4 and above (as displayed in the Config Utility). This is a complete
reset that will clear the data held by the ACU and the IP settings, returning it to DHCP
Technical help
