Operation
I
4-17
4
Opera
tion
SPI Option Parameters
Command
Poll
Select
Description
Echo
20 20
20 21
Controller integrity command used to accept and retain data and provide it in response to
a poll inquiry in an open 4-byte ASCII format with ASCII units.
Version
20 22
Controller version command used to provide a version number following format: AABB,
where AA=SPI assigned version level, BB=vendor assigned version level in an open
4-byte ASCII format with ASCII units.
Set Point Process Temperature
20 30
20 31
Target supply coolant temperature leaving the unit in a numeric format in °F.
Alarm, High Temperature Deviation
20 32
20 33
Value in conjunction with the process set point that determines the high alarm tempera-
ture in a numeric format in °F must always be positive.
Alarm, Low Temperature Deviation
20 34
20 35
Value in conjunction with the process set point that determines the low alarm tempera-
ture in a numeric format in °F must always be positive.
Status, Process
20 40
Process status in a 16-bit format as follows:
0=controlling
1=an alarm is present
2=an alarm affecting the process has occurred (high or low temperature deviation)
3=an alarm affecting the machine has occurred (probe fault or pump fault)
4=the controller has exceeded its over set point deviation
5=the controller has exceeded its below set point deviation.
Status, Machine 1
20 42
Machine status in a 16-bit format as follows:
0=controlling
1=an alarm is present
2=an alarm affecting the process has occurred (high or low temperature deviation)
3=an alarm affecting the machine operation has occurred (probe fault or pump fault)
4=the controller has exceeded its over set point deviation
5=the controller has exceeded its below set point deviation.
Status, Machine 2
20 44
Machine status in a 16-bit format as follows:
0=controlling
1=an alarm is present
2=an alarm affecting the process has occurred (high or low temperature deviation)
3=a sensor error has been detected
4=an alarm affecting the machine operation has occurred.:
Mode, Machine
20 48
20 40
Machine mode in two 8-bit bytes. When polling 20 48 bit 0 indicated the machine is off. 20
40 bit 0 commands the unit to be turned on or off (on when high or off when low). 20 40
bit 1 is used to recognized the alarm condition.
Temperature, To Process (Supply)
20 70
Returns the process supply temperature in a numeric format in °F.
Temperature, To Process (Return)
20 72
Returns the process return temperature in a numeric format in °F.
Summary of Contents for Thermolator TW-P
Page 6: ...iv I Table of Contents ...
Page 12: ...1 6 I Introduction ...
Page 36: ...3 14 I ...
Page 58: ...4 22 I Operation ...
Page 72: ...5 14 I Maintenance ...
Page 128: ...E 4 I Appendix ...
Page 134: ...G 4 I Appendix ...
Page 136: ...H 2 I Appendix ...