Yamatake SDC35, User Manual

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• Operation at a changeover point between zones is as shown below.
As an example, the change between PID1 and PID2 is shown.
■
Heat/Cool control
The Heat/Cool control related items, such as Heat/Cool, Heat/Cool control dead
zone, and Heat/Cool change point can be set.
However, when the control output type is R1 (motor drive relay output), the
Heat/Cool control is not enabled.
The following shows the Heat/Cool control calculation:
5-24
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Shows that the PID group changes at this value.
Shows that the PID group changes at the point
where 1U is added to this value.
Zone 1 setpoint
PID2
PID1
Hysteresis for zone
Item (Bank) Display Contents Initial value User level
Heat/Cool
(Setup bank) 0: Normal
1: Energy saving 0 Standard,
High function
Heat/Cool control dead
zone
(Setup bank) 0.0% Basic,
Standard,
High function
-100.0 to +100.0%
Heat/Cool change point
(Setup bank) 50.0%
High function
-10.0 to +110.0%
PID (heat) PID (cool)
Heat/Cool
change
point
PID control
(Fixed at
reverse action)
PID (heat)
Constants oL, oH
PID (cool)
Constants oL, oH
Heat/Cool output
calculation
Heat/Cool control dead zone
Heat/Cool control change point
Constants P, I, d, rE
Heat MV
Cool MV
PV
SP MV
(PID control result)