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Examples of Applied Control Types
Section
5-2
164
Block address
ITEM No.
Data
Explanation
002
586
AI 4-point Terminal block
021
Y1 (analog input 1)
901
022
Y2 (Analog input 2)
002
587
AO 4-point terminal block
021
002087
X1 (analog output 1) source
designation
902
031
X1 (analog output 1)
002
012
Advanced PID block
006
901021
PV source designation
001
087
MV
002
012
Advanced PID block
006
901022
PV source designation
021
001087
RSP source designation
032
1
Bumpless processing between
primary/secondary loops
1
002
087
MV
1: By this function, the value of the secondary loop LSP2 is forcibly written
over the primary loop MV1 when the secondary loop is set to Local.
Note 3
As shown above, the function of ITEM032 (bumpless processing between
primary/secondary loops) of the Basic PID block (Block Model 011) or
Advanced PID block (Block Model 012) can be used to enable switching of
primary loop MV1 to the secondary loop LSP2 when the secondary loop is
set to Local.
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.
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
Ladder in Step Ladder Program block