THERMOCUBE II 200-650W THERMOELECTRIC CHILLER MANUAL 52-14790-1
SOLID STATE COOLING SYSTEMS, 167 MYERS CORNERS ROAD, WAPPINGERS FALLS, NY 12590 24
TELEPHONE: (845) 296-1300, FAX: (845) 296-1303, WEB: WWW.SSCOOLING.COM VERSION M2
Table 7 % Cooling or Heating Examples (hex)
High Byte
(Binary heat or cool)
Hexadecimal
String as Sent
Notes:
1) Each data set is independent and can be run separately
2) The command byte is always active, so be careful when sending that the three most significant bits
(bits 5-7) are set correctly. Bit 7 is remote operation (1 = remote), bit 6 is ON/OFF (1 = ON = unit
controlling temperature), bit 5 is Data direction (1 = host to controller, e.g. host sends set point to
controller).
3) The ThermoCube II can store 8 bytes of transmission and can only handle up to 3 commands per
second.
4) The ThermoCube II does not echo back commands from the host.
5) If RS-232 communication does not seem to be functioning, cycle the main power to reset.
7.2.3 RS-232 Communication Examples:
Table 8 HEX RS-232 communications examples
1) Send set point of 50°F (10°C)
Host sends command byte = E1 (hex)
Host sends LOW data byte = F4 (hex)
Host sends HIGH data byte = 01 (hex)
2) Receive chiller set point
Host sends command byte = C1 (hex)
Chiller sends LOW data byte = set point value in hex (LB)
Chiller sends HIGH data byte = set point value in hex (HB)
3) Receive RTD temperature
Host sends command byte = C9
Chiller sends LOW data byte = actual temp in hex (LB)
Chiller sends HIGH data byte = actual temp in hex (HB)
4) Receive the faults table
Host sends command byte = C8
Chiller sends faults data byte = fault data in hex
5) Receive % Cooling or Heating
Host sends command byte DE
Chiller sends the % of full cooling or heating in hex,
followed by 80 if cooling or 00 if heating
5) Send Remote Start only
Host sends command byte = E0
Host sends command byte = A0
7) Clear Alarms and Restart
Host sends command byte = FE
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