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CHAPTER 4 FUNCTIONS
4
4.26 Overlap/Dead Band Function
(3) Dead band setting in two-position control (three-position control)
Set the dead band in two-position control.
Three-position control can be achieved by setting a dead band area in addition to areas for the manipulated value
for heating (MVh) 100% and the manipulated value for cooling (MVc) 100%.
(4) Setting method
Set the function in the following buffer memory area.
•CH Overlap/dead band setting (Un\G723, Un\G739, Un\G755, Un\G771) ( Page 152, Section 3.4.2
(74))
Heating only
(manipulated value for cooling (MVc): 0%)
Cooling only
(manipulated value for heating (MVh): 0%)
Heating
Set value (SV)
Cooling
Temperature
process value (PV)
Temperature when
cooling starts
100%
0%
-100%
Manipulated value
for heating (MVh): 0%
Manipulated value
for cooling (MVc): 0%
Heating proportional band (Ph): 0
Cooling proportional band (Pc):
No setting required
Integral time (I):
No setting required
Derivative time (D):
No setting required
Input range