T
HERMO
R
ACK
800
T
HERMOELECTRIC
C
HILLER
52-13007-1
S
OLID
S
TATE
C
OOLING
S
YSTEMS
,
167
M
YERS
C
ORNERS
R
OAD
,
W
APPINGERS
F
ALLS
,
NY
12590
16
T
ELEPHONE
:
(845)
296-1300
F
AX
:
(845)
296-1303
WEB
:
WWW
.
SSCOOLING
.
COM
V
ERSION
M8
S
ECTION
7
7.1
USB
C
OMMUNICATIONS
________________________________________
The Thermorack 800 comes with a USB serial communications capability that can receive a remote set
point, return the current temperature, and signal an alarm has occurred. Communicating with the chiller
via USB with requires installing a Silicon Labs CP210x driver on the host computer. Call SSCS at 845-
296-1300 ext. 324 to receive a copy of this along with installation instructions. USB communications
software is also available.
Connector Type:
Type-B
Speed:
9600 baud
Number of Start bits:
1
Number of Stop bits:
1
Parity:
None
Maximum Polling Frequency: One command every 500msec
Data Update Frequency:
Once per second
Host/Device:
Thermorack 800 is the device, PC is the host
Interrupts Reported:
None, must be polled for status
Data Format:
ASCII
Insert a carriage return (0x0D
hex
) at the end of each command string.
A carriage return (0x0D
hex
) is sent at the end of each response
Table 2 USB Commands
PARAMETER
GET Data
Command
Response
PUT Data
Command
Response
Show all parameters
(see next page for details)
GETSET2
TEMP, SETTEMP,
PUMPTEMP, PWM?,
FANPWM, TLL,
STAT1A, FLTS1A
Show chiller identification
information
IDN
Solid State Cooling, Product
Name, Model#, Software
Number & Revision, Serial
Number
Put chiller in LOCAL mode
LOCAL
Chiller: run, stop
RUN?
RUNNING or STOPPED
RUN, STOP
RTD temp
TEMP?
(-)XX.X
Set-point Temperature
SETTEMP?
(-)XX.X
SETTEMP
(-)XX.X
Temperature Alarm width (+/-)
WIDTH?
XX.X
WIDTH
XX.X
RTD offset
RTDOFFSET?
(-)XX.X
RTDOFFSET
(-)XX.X
Display backlight on/off
-
BLON, BLOFF
Pump temperature
PUMPTEMP?
(-)XX.X
Actual TE PWM %
PWM?
(-)XX.X
Status word 1 (5 ASCII bytes)
STAT1A?
0 - 65535
Faults word 1 (5 ASCII bytes)
FLTS1A?
0 - 65535
Reset All Alarms and Restart
RESTART
NOTES:
1.
All commands are case insensitive
2.
The chiller will automatically begin operating in REMOTE mode upon initiation of USB
communications. This will lock-out the keypad.
3.
The chiller performs actions upon receiving LOCAL, RUN/STOP and BLON/BLOFF commands,
but does not send back a USB response.
