iSMA-B-MINI/MIX BACnet User Manual
www.ismacontrolli.com
DMP261en | 1st Issue rev. 8 | 05/2022
page 24 of 114
Figure 26. Setting the MAC address in a master mode
Switches set as in the figure above will set the MAC module to 11.
The example of the
BACnet slave
protocol
mode (only RS485 modules; IP modules do
not support BACnet slave):
Figure 27. Setting the MAC address in a slave mode
Switches, set as in the picture above, will set the MAC module to 139 (128+11).
4.5.2 Setting Device ID in BACnet Protocol
Formula for the Device ID:
Device ID = Vendor ID * 1000 + MAC + 128
(only in BACnet slave)
where iSMA
CONTROLLI Poland
Vendor ID = 826.
For example, if the MAC address is set to 41, and the protocol is set to BACnet master,
then the Device ID = 826041, or if the protocol is set to BACnet slave, then the Device ID =
826169.
If the user changes the Device ID (by setting a new value of the Device ID property in the
Device object), then changing the MAC address with rotary switches will not change the
Device ID. In order for the Device ID to be modified again by changing the MAC address,
the device needs to be restored to the default settings.
4.6 Baud Rate
The transmission baud rate is set with the S3 switch (sections 1, 2, and 3) in accordance
with the following table: