B&B Electronics 232DTT Manual - Read High
8
Chapter 4
232DTT1795 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
Read High
Command: !0RH
Arguments: none
Response: contents of TH register in 9 bit two’s complement format
(shown in boldface)
Dec. Example: !0RH<0><50>
ASCII Example: !0RH
Description: The TH register contains decimal 0 (ASCII NUL) and
decimal 50 (ASCII 2). This converts to a temperature of 25
°
C.
When the current temperature is
≥
25
°
C, the high thermostat output
(THIGH) will turn on.
Read Low
Command: !0RL
Arguments: none
Response: contents of TL register in 9 bit two’s complement format
(response is shown in boldface)
Dec. Example: !0RL<0><36>
ASCII Example: !0RL
Description: The TL register contains decimal 0 (ASCII NUL) and
decimal 36 (ASCII $). This converts to a temperature of 18
°
C.
When the current temperature is
≤
18
°
C, the low thermostat output
(TLOW) will turn on.
Clear Status Register
Command: !0SC
Arguments: none
Response: none
Example: !0SC
Description: The Clear Status command resets the DTT. Bits 5 and
6 which latch the thermostat outputs are cleared if the current
temperature is within the bounds of TH and TL.
Set High Thermostat
Command: !0SH
Arguments: 9 bit, two’s complement value to set non-volatile TH
register.
Response: none
Dec. Example: !0SH<0><64>
ASCII Example: !0SH
Description: Sending the decimal arguments 0 (ASCII NUL) and 64
(ASCII @) sets the TH register to a temperature of 32
°
C. This is a
non-volatile register and will not change until this command is issued