User`s manual

Table Of Contents
535 User's Manual Chapter 7 87
Applications
Basic Operating Procedures
After configuring the hardware and software, select the remote input by:
pressing the SET PT key until RSP shows in the display
using a digital input
J. MULTIPLE SETPOINTS
The 535 can store up to eight local setpoints and use a remote setpoint. One
application of this feature is configuring the controller to restrict operators to
discrete setpoint choices. The 535 can also store multiple sets of PID
parameters (see next section).
Software Configuration
1. Go to the SPECIAL menu.
2. Set NO. OF SP to the number of local setpoints desired.
3. Use the SET PT key to scroll to each local setpoint and set it to the desired
value with the or keys.
4. To link the PID sets to the corresponding local setpoint:
Go to the TUNING menu.
Set NO. OF PID to SP NUMBER.
For details on multiple sets of PID, refer to the next section in this chapter.
Basic Operating Procedures
To select a set point, toggle the SET PT key to scroll through the setpoints. The
displayed setpoint becomes active after two second of key inactivity.
The digital inputs can also be used to select the active setpoints. A single digital
input may be used for selecting the second setpoint, SP2. A set of four digital
inputs may be used, to select up to 8 setpoints (see the section in this Chapter
on Digital Inputs).
The SET PT key is lit when a setpoint other than the primary local setpoint is
active.
K. MULTIPLE SETS OF PID VALUES
The 535 has the ability to store up to eight sets of PID values. This can be a
valuable feature for operating the controller under conditions which require
different tuning parameters for optimal control. There are various methods of
selecting which set should be active. These methods are explained in this
section.
Software Configuration
1. Go to the TUNING menu.
2. NO.OF PID is the desired number of PID sets to be stored. SP VALUE
automatically sets this value equal to the number of stored local setpoints
(each PID set will be active when its respective local setpoint is active).
3. PID TRIP determines which variable selects the various PID sets: process
variable, setpoint or deviation from setpoint.
4. TRIP:X defines the point (in the PV range) at which that set of PID values
become active.