Yamatake SDC35, Руководство пользователя

Страница: 72 / 280

5-14
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
■
Control method
A desired control method can be selected from two kinds of control methods.
• When the control output type is the position proportional output, only [1: Fixed
PID] can be selected.
• When the control output type is relay (R0), the initial value becomes "0". The
initial value is "1" in other cases.
• "Fixed" of [1: Fixed PID] means that the PID constant is not changed
automatically since the self-tuning (ST) provided for SDC15 is not run.
However, the AT can be run even in the fixed PID control.
• The following table shows valid and invalid functions related to [1: Fixed PID],
as well as other related parameters:
Item (Bank) Display Contents Initial value User level
Control method
(Parameter bank) 0: ON/OFF control
1: Fixed PID 0 or 1 Basic,
Standard,
High function
Classification of Classification Classification of RationaLOOP AT Just-FiTTER
Heat/Cool control of RationaLOOP control action function
Normal control Normal PID P control X
❍ ✽
X
PI control X
❍ ✽ ❍
PD control X
❍ ✽
X
PID control X
❍ ❍
RationaLOOP P control X
❍ ✽
X
PI control X
❍ ✽ ❍
PD control X
❍ ✽
X
PID control
❍ ❍ ❍
Heat/Cool control Normal PID P control X
❍ ✽
X
PI control X
❍ ✽ ❍
PD control X
❍ ✽
X
PID control X
❍ ❍
RationaLOOP P control X
❍ ✽
X
PI control X
❍ ✽ ❍
PD control X
❍ ✽
X
PID control
❍ ❍ ❍
Remarks
✽
Adjustment result be-
comes the PID control.
Related settings Control algorithm AT type Just-FiTTER overshoot limit/
restraint/control coefficient
MV low limit at AT Just-FiTTER
settling band
MV high limit at AT
AT Proportional
band adjust
AT Integral time
adjust
AT Derivative time
adjust