Bit Switch Settings on the MicroNet MI When Connected to a Xenta, VisiSat, or SBO Server

[Product_Support]

Issue

Communication failures occur when connecting a MicroNet ARCnet system via a MicroNet Manager Interface (MNMI) to Xenta 555/731, VisiSat, or SBO servers.

Product Line

Satchwell MicroNet, TAC Vista, EcoStruxure Building Operation

Environment

• Xenta 555 or Xenta 731 communicating to a MicroNet ARCnet LAN
• VisiSat communicating to a MicroNet ARCnet LAN
• Building Operations Server communicating to a MicroNet ARCnet LAN

Cause

Incorrect bit switch configuration on the MicroNet MI interface.

Resolution

Cold Starting the MicroNet MI

⚠️ Caution: This procedure will erase all configuration data from the device’s EEPROM and restore factory defaults.

Steps:

1. Power On the Device

   • Ensure the RUN LED flashes approximately once per second.

2. Disconnect Communication Ports

   • Unplug any connections to 9-pin plug 3 and 9-pin plug 4.

     

3. Reset Switches

   • Set all bit switches (S1) to the OFF position.

     

4. Initiate Cold Start

   • Toggle bit switch 8 ON, then OFF.

     

   • No visible change will occur at this stage.

5. Configure for Xenta 555 Direct Connection

   • Set only switch 1 to ON; all others must remain OFF.

     

   • Toggle bit switch 8 ON, then OFF again.

     

6. Verify LEDs

   • RUN, WINK, and MODEM LEDs should light up for ~1.5 seconds.
   • RUN LED should resume flashing once per second.

🔍 Note: This cold-start procedure differs from that of a controller, which only requires toggling switch 8. Refer to data sheet DS10217A for detailed specifications.