EXCEL CARE CONTROL ICONS EXAMPLES
267 74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
Auto/day operation switchover is via a switching table comparison. If input voltage
TW is greater than 4.24V, the switching table is 1 and the SWI statement transmits
the automatic setpoint. Other, SWI transmits the day setpoint.
Night operation also is via a switching table comparison. If the TW input voltage
drops below 0.25V, the switching table writes a fixed setpoint of 12C (54F) to the
corrected setpoint.
Note that switching tables have priority over control loops so the night operation
functions although the control loop writes the day setpoint on the corrected setpoint.
TW Linear Characteristic When defining the TW input, you need to define a linear characteristic curve of 0
through 10V.
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