D-8 l SPI Comm un ica tions
Supported Dryer SPI Commands
(continued)
9. Mode, Machine - This is used to start/stop the dryer, acknowledge alarms and
observe the run status.
Bit0 -Start/Stop (1 = running or start, 0 = stop or stopped)
Bit1 - Acknowledge Alarms
Select: 20h, 49h Poll: 20h, 48h
10. Temperature, To Process - This is the actual the actual process (drying) temperature
controlled by the dryer.
Select: NA Poll: 20h, 70h
11. Temperature, From Process - This is the actual temperature as read by the RTD at
the exit of the drying hopper. This is the temperature that is used for setback control
in the dryer. Note that this is an optional feature and the value may be invalid if the
feature is not installed on the dryer.
Select: NA Poll: 20h, 72h
12. Flow, To Process - This is the flow of dry air to the process. Note that this is an
optional feature and the value may be invalid if the feature is not installed on the
dryer.
Select: NA Poll: 20h, 78h
13. Dewpoint - This is the actual dewpoint of the process air. Note that this is an
optional feature and the value may be invalid if the feature is not installed on the
dryer.
Select: NA Poll: 20h, 7Ch
14. Setpoint, High Dewpoint Alarm - This is the setpoint for the dewpoint alarm
triggered by 13.
Select: 20h, 81h Poll: 20h, 80h
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