AFA4000/E VAV Airflow Controller / p.180
14. Select the required parity and press Mute.
15. Select Max Masters, then press Mute.
16. Enter the required parameter and press Mute.
10.2.4 Testing the comms settings
The AFA4000 diagnostics menu (section 13.2) can be used to check the comms settings and
operation once the AFA4000 comms parameter settings have been set up.
Press the ↑ / ↓ buttons together from the Run screen to access the Diagnostics Menu.
Press the ↑ / ↓ buttons to select Comms data, then press Mute.
The Comms data for the relevant selected protocol will be displayed.
10.2.5 Troubleshooting the comms settings
10.2.5.1 BACnet protocol
If the device is not present on the network, check the following:
• Make sure the AFA4000 is either in Run mode or is displaying the Diagnostics screen. The
comms are interrupted when the AFA4000 is in the pushbutton menus.
• Power cycle the AFA4000. This is required if the protocol has been changed.
• Make sure Max Masters is set to the number of devices on the network. If the value set is
larger than the actual number of devices the comms will be slowed and may cause time-out
issues.
• Make sure the network is BACnet MS/TP and not BACnet IP. A separate router is required
for IP.
• Use the Diagnostics Menu to check the comms settings are correct (see below):
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