Contemporary Controls BASstat BAST-221C-BW2 User Manual page 26

Lock Function Setup and Examples
The 16-bit binary encoded decimal register accessed through Lock [AV17] BACnet object and LOC
engineering menu item is used to enable/disable features in the thermostat. The first 10 bits are
used (bit 0 ~ bit 9), bits 10~15 are reserved/unused. Bits are represented by their decimal values
and are added or subtracted to toggle from "0" to "1". Add a bit's decimal value to toggle to "1" or
subtract a bit's decimal value to toggle to "0". See table below.
Bit Definition:
0: MODE button (dec=1)
1: DOWN button (dec=2)
2: UP button
3: FAN SPEED button
5: SET (or ℃/℉) button
4: POWER On/Off button (dec=16)
6: ESI contact detection
7: Door/Window contact
detection (unused)
8: Modification for communication parameters
(dec=256)
i.e., baud rate, MAC addr, device inst.
9: Control DOs by thermostat algorithm
(0) or BACnet sup. (1)
10~15: reserved/unused
Bit Value:
0: Unlock / enable
1: Lock / disable
UM-15090500-AA1
Decimal Value to Write:
(dec=4)
(dec=8)
(dec=32)
(dec=64)
(unused)
(dec=512)
(unused)
Add decimal values to lock multiples. Bold decimal number is
the example value to write to Lock object. Examples:
Unlock/enable all (0) – this will also enable ESI DI1
(add 64 to all values below to maintain default
occupancy selection over BACnet).
Lock MODE button (1)
Lock DOWN button (2)
Lock MODE & DOWN (3 = 1+2)
Lock UP button (4)
Lock MODE & DOWN & UP (7 = 1+2+4)
Lock FAN SPEED button (8)
Lock MODE & DOWN & UP & FAN (15 = 1+2+4+8)
Lock POWER button (16)
Lock MODE & DOWN & UP & FAN & POWER (31 =
1+2+4+8+16)
Lock SET button (32)
Lock MODE & DOWN & UP & FAN & POWER & SET
(63 = 1+2+4+8+16+32)
ESI contact disable (64 – default). When the default
value of 64 is maintained, occupancy is set over
BACnet and SET user button.
Lock MODE & DOWN & UP & FAN & POWER & SET
& disable ESI DI1 (127 = 1+2+4+8+16+32+64)
Door/Window contact detection
Lock the modification for communication parameters
such as baud rate and mac address (256)
Lock MODE & DOWN & UP & FAN & POWER & SET
& disable ESI DI1 & modification for communication
parameters (383 = 1+2+4+8+16+32+64+256)
DOs control commanded by BACnet (512)
(unused)
Page 25