Omron SYSMAC CS Series User Manual

194
Examples of Applied Control Types Section 5-2
However, control is as follows when the primary loop MV1 must be switched to
the secondary loop PV2 when the secondary loop is set to Manual.
When the secondary loop is set to Manual, turn the primary loop MV tracking
switch ON and use the secondary loop PV2 to switch the primary loop MV1 to
this PV2. The following shows an example of this.
Ladder in Step Ladder Program block
5-2-2 Feedforward Control
Before the influence of disturbances such as load fluctuation appears in the
process result, disturbance is detected beforehand to correct MV so that its
influence is canceled. Feedforward control is used in combination with feed-
back control.
Example Function block used: Lead/Delay (Block Model 147)
The output of the Lead/Delay block is added to the MV output of the Advanced
PID block.
Analog
output
Analog
input
Analog
input
022
PV2
006
PV2
Advanced PID
<Block Model 012>
021
086
A/M
087
MV2
006
Advanced PID
<Block Model 012>
Address 001
083
PV2
087
PV
085
MV tracking
MV tracking
MV1
SP2
A/M
MV tracking
PV1
021
021
Address 002
Step Ladder Program
<Block Model 301>
Address 400
002-086 001-085
Secondary Auto/Manual
MV tracking switch
•
The MV tracking switch turns OFF when PID
2
is set to Auto, and turns ON when PID2 is set
to Manual.
Lead/Delay
Block Model 147
Disturbance
Advanced PID
Block Model 012
MV
PV
MV compensation (ITEM074)

Omron SYSMAC CS Series Specifications

General

Brand	Omron
Model	SYSMAC CS Series
Category	Controller
Language	English