April 2010
[12]
3.2
FINE-TUNING THE CHANNEL SETPOINTS
One of the key feature of the PLS is the user‟s ability to fine-tune (increment or decrement) a
channel‟s setpoint while the machine is operating. The TPRLS unit offers you the capability of
fine-tuning the leading (On setpoint), trailing (off setpoint) or both edges of a setpoint pair.
The
Table
3.1
showed examples of objects that can be modified in just one step. This section
describes how to fine-tune the Channel Setpoints, which requires a few sequential steps.
The PRLS objects (
Main Menu > Objects> PRLS
) allow you to display and monitor up to 32
different channels representing different PRLS outputs. You can control the parameters and
visual characteristics of how these channels will appear on screen. An example of a Multiple
PRLS object displaying Channels 1-8 is shown below:
Fig 3.2a Multiple PRLS object – displays program Channels and setpoints
The Table
below demonstrates the steps required to fine-tune the Channel Setpoints. The screen
objects can vary according to your preferences:
Steps to
follow
PRLS Object’s function
Predefined PRLS Tag
Name
Tag
Address
Typical
Object Used
Step 1
Ensure that the Program
Enable bit is active
PROGRAM ENABLE
R135/3
Indicator Light
Step 2
Select the output Channel
to Fine-tune
CHANNEL_TO_
FINETUNE
R24
Numeric Entry
Step 3
Specify the Setpoint,
within the Channel to
Fine-tune
SETPOINT_
TO_
FINETUNE
R25
Numeric Entry
Step 4
Select a Fine-tune
function (Leading edge,
Trailing edge or Pulse)
FINETUNE
R26
Multi-state
Bitmap
Step 5
Increment the Setpoint
FINETUNE_INCREMENT
R27
Bitmap Button
Step 6
Decrement the Setpoint
FINETUNE_DECREMENT
R28
Bitmap Button
Fig 3.2b Steps to fine-tune a Channel Setpoint