Honeywell Spyder 5 User Manual page 103

Setting MAC Address of Controller", p. 104). Make sure that unique MAC addresses are assigned.
IMPORTANT!
Once you have changed all desired MAC addresses for the controllers, it is recommended to change the Max Master
setting of the controllers to the highest MAC address (=Max MAC) among all controllers. This results in an optimum bus
performance.
NOTE: If the Max Master setting is not set to the Max MAC value, it will not impact the MSTP functionality, but only the
MSTP performance.
Swapping MAC Addresses
If you want to assign to a controller (A) a MAC address which is already assigned to another controller (B), the following
steps must be applied:
1. Re-assign a free MAC address in the range of 1-32 to the controller B which blocks the needed MAC address.
2. Now, assign the freed MAC address of controller B (step 1) to the controller A.
3. Assign the next needed MAC address to the controller B (optional, e.g. in case of particular MAC address
requirements).
4. Above steps can be continuously applied for assigning desired MAC addresses to further controllers.
5. Change the Max Master setting to the highest MAC address (=Max MAC) among all controllers (see Important Note
above).
SPYDER MODEL 5 ENGINEERING TOOL – USER GUIDE
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