To change the CAS BACnet explorer MSTP MaxMaster.
1) Open the settings file with notepad. The settings file is stored in of two places
C:\Users\<username>\Documents\CAS BACnet Explorer\Settings.xml
C:\Users\<username>\Documents\CAS BACnet Explorer (beta)\Settings.xml
2) Find the iMSTPNmaxMaster value
<key name=”iMSTPNmaxMaster” value=”127“/>
3) Change the value to a number between 1-254. Note: 255 (OxFF) is reserved for broadcasts.
From the BACnet Spec:
This parameter represents the value of the Max_Master property of the node’s Device object. The value of Max_Master specifies the highest allowable address for master nodes. The value of Max_Master shall be less than or equal to 127. If Max_Master is not writable in a node, its value shall be 127.