YOKOGAWA UTAdvanced UT55A, User Manual

Page: 152 / 476

8-23
IM 05P01C31-01EN
Control Functions
8.1.4 Cascade Control, Cascade Heating/cooling Control, and Cascade
Position Proportional Control
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menu symbol
CTLM Control mode STD
SGL: Single-loop control
CAS1: Cascade primary-loop
control
CAS2: Cascade secondary-loop
control
CAS: Cascade control
BUM: Loop control for backup
PVSW: Loop control with PV switching
P VSEL: Loop control with PV auto-
selector
PVHD: Loop control with PV-hold
function
CTL
CAUTION
• Some parameters will be initialized if the control mode (CTLM) is changed.
• When using the ladder program, the control mode cannot be changed.
Description
These control modes use two control computation units and permits Cascade control
using just a single controller.
Cascade control can be used for Standard type or Heating/cooling type controller.
Cascade heating/cooling control can be used for Heating/cooling type controller.
Cascade position proportional control can be used for Position proportional type
controller.
► PID control and Heating/cooling control: 8.2 Setting Control Type (CNT)
Up to four 10-segment linearizer approximation/10-segment linearizer biases can be
used for the input unit or output unit.
The Function block diagram describes only the basic functions.
Parameter symbols in the Function block diagram describe representative parameters.
For the functions and parameters which are not described in Function block diagram, see
the following.
► Contact input assignment: 12.1 Setting Contact Input Function
► Contact output assignment: 12.2 Setting Contact Output Function
► Contact output assignment to retransmission output terminal: 10.1 Setting Control Output Type
► Analog output range change: 10.14 Changing Current Output Range
8
8.1 Setting Control Mode (CTLM)