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SETTING
MSTP BAUD RATE—Set the baud rate for the BACnet MS/TP communications to one of the following values:
9600, 19.2K (19200), 38.4K (38400), 76.8K (76800) or 115k (115200). The BACnet MS/TP baud rate must be set
to match the other devices on the BACnet MS/TP network.
NOTE: Changing the MS/TP baud rate requires restarting the thermostat. When the installer exits the configuration
settings after making changes to the BACnet settings, there is a prompt to either cancel those settings or save the
new setting, which forces a thermostat reset.
This setting is not be displayed if BACnet is disabled.
MSTP MAC—Set the BACnet MS/TP MAC addresses for master devices. Each BACnet MS/TP device on a MS/
TP segment, must have a unique MAC address. Performance gains can be made on a BACnet MS/TP network by
not leaving any gaps in MAC addresses, eliminating the need for each device to continuously check the addresses
above its address and up to the next known device for new devices. Although the BACnet standard does not limit
the use of MAC address zero, it is often reserved for an MS/TP router.
NOTES:
•
Changing the MS/TP baud rate requires the thermostat to be restarted. When the installer exits the
configuration settings after making changes to the BACnet settings, there is a prompt to either cancel those
settings or save the new settings, which forces a thermostat reset.
•
The MSTP MAC is set to a value less than or equal to the MSTP Max Master setting.
This setting is not displayed if BACnet is disabled.
BACNET UTC OFFSET—Specify a UTC offset to be set from -13 to +13 hours in increments of 15 minutes.
When a BACnet UTC Time synchronization message is received by the device, the value in UTC Offset is
subtracted from the UTC Time to determine the local standard time. The Daylight Saving time logic is then applied
to the standard time to get the local time with Daylight Saving.
NOTE: For reception of the UTC Time synchronization service to be enabled (and UTC offset used) on the device,
the SYNCH TIME TO SERVER option has to be set to NO and DST must be set to ENABLED.
This setting is not displayed if BACnet is disabled.
DEVICE ID—Specify a Device ID from 0 to 4194302. The Device ID can also be updated over BACnet when the
BACNET CONFIG WRITE configuration is set to YES.
Device IDs on BACnet devices must not only be unique on MS/TP segment like the MAC address, but must also be
unique internetwork-wide. Each device broadcasts its Device ID using the I-Am service upon power up and in
response to the Who-Is service. Changing the Device ID triggers a new I-Am message to be sent including the new
Device ID.
The top line in this screen scrolls to display the DEVICE ID and the ID value.
The SELECT button changes the screen to the Device ID editor. Initially the first non-zero is flashing, indicating that
it can be changed by the up and down arrows. There are left and right arrows in the middle row of the screen that
can be pressed to move the cursor left and right to change each digit individually. Changing the Device ID triggers
an I-Am message to be sent over BACnet and will increment the Database Revision property in the Device object.
This setting is not displayed if BACnet is disabled.
DEVICE NAME
This setting can be viewed but not modified from the display. The DEVICE NAME can be updated over BACnet
when the BACNET CONFIG WRITE is set to YES.
Device Object Names on BACnet devices must not only be unique on MS/TP segment like the MAC address, but
must also be unique internetwork-wide.
The top line in this screen scrolls to display DEVICE NAME and the name.
NOTE: Changing the Device Object Name causes the Database Revision property of the Device to be
incremented.
This setting is not be displayed if BACnet is disabled.
DEVICE LOCATION—To view, but not modify from the display, the Device Location, which is an optional property
used to describe the physical location of the BACnet device.
The DEVICE LOCATION can be updated over BACnet when the BACNET CONFIG WRITE configuration is set to
YES.
The top line in this screen scrolls to display the DEVICE LOC and the location.
This setting is not displayed if BACnet is disabled.
DEVICE DESCRIPTION—To view, but not modify from the display, the Device Description. Description is an
optional property used to add descriptive information about the BACnet device.
The Device Description can be updated over BACnet when the BACNET CONFIG WRITE configuration is set to
YES.
The top line in this screen scrolls to display the DEVICE DES and the description.
NOTE: This setting is not displayed if BACnet is disabled.
BACnet BMS OCC—Enable or disable occupancy scheduling through the BACnet BMS by enabling or disabling
the connection between the Present Value of the BACnet Binary Object Value named BMS_OCC and the
occupancy state of the controller.
NOTE: Occupancy is determined using 1 of 3 methods. BACnet BMS OCC is mutually exclusive with both
PROGRAMMABLE MODE and REMOTE SENSOR set to OCCUPANCY. Setting BACnet BMS OCC to Yes
forces PROG or NON-PROG to NON-PROG and switches REMOTE SENSOR to None if set to OCCUPANCY.
This setting is not displayed if BACnet is disabled.
BACNET CONFIG WRITE—Allow (YES) or disallow (NO) BACnet writes to modify system settings. Many of the
configuration items are exposed as BACnet objects. These BACnet objects can be read to verify the thermostat's
configuration. If BACnet Config Write is set to YES, these objects can also be written to change the thermostat's
configuration. If set to NO, these objects are read-only. NOTE: This setting is not displayed if BACnet is disabled.
NET GP OUT TIMEOUT—Set the timeout associated within network general purpose outputs. If this value is set to
2 minutes, 20 minutes, or 60 minutes, this number represents the maximum time that can lapse between writes to
the Present Value property of the output object before the value returns to the inactive state.
NOTE: This setting is not displayed if BACnet is disabled.
Table 8 — BACnet Settings (cont)
19
DEFAULT/RANGE
D:
76.8K
R:
9600
19.2K (19200)
38.4K (38400)
76.8K (76800)
115k (115200)
D:
1
R:
0 to 127
(Increments of 1)
D:
5:00 (5 hours 0 minutes)
R:
-13:00 to 13:00
(15 minute increments)
D:
16xxxx where xxxx is the
last four digits of the
thermostat serial number.
R:
0 to 4,194,302 (increments
of 1)
D:
DEVICE 16xxxx (last 4
digits of the serial number)
R:
Any printable string with a
maximum length of 16
characters
D:
Location
R:
The display is limited to
showing only the first 28
characters of the maximum
32 characters allowed.
D:
Description
R:
The display is limited to
showing only the first 28
characters of the maximum
32 characters allowed.
D:
YES (enabled)
R:
YES (enabled)
NO (disabled)
D:
Yes
R:
Yes
No
D:
2 Minutes
R:
2 – 2 Minutes
20 – 20 Minutes
60 – 60 minutes
UNLM - Unlimited
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