YOKOGAWA UTAdvanced UT55A, User Manual

Page: 140 / 476

8-11
IM 05P01C31-01EN
Control Functions
8.1.2 Cascade Primary-loop 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
PVSEL: 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
Cascade primary-loop control sets up a controller as the primary-loop controller when
two controllers are used for Cascade control.
It provides the output tracking function and FAIL output to the secondary-loop controller.
Cascade primary-loop control can be used for Standard type or Heating/cooling type
controller.
► PID 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)