Watlow Silver Series Addendum - Manual (Page 45)

Silver Series OIT  45  Watlow Addendum
Address indexing allows a screen object to display and set the value of different memory locations
depending on the value in the index. In this example we use LW-9200 as the address index. Whatever
value the index is set to is added to the address in the data transfer (and recipe display) objects. When
the index value is zero, the first recipe is used. When the index is 10 the second recipe is used. When the
index is 20 the third recipe is used. A multi-state switch is used to set the value of the index when the
user selects the recipe.
Note: You can also use the address index to create one screen that displays data for
one loop at a time with a multi-state switch or option list that allow users to switch
from one loop to another.
Data Transfer Object 1
(Lp 1 Set Point)
Address = RW 0 + index
Data Transfer Object 2
(Lp 1 Hi Alarm)
Address = RW 2 + index
Data Transfer Object 3
(Lp 1 Heat PB)
Address = RW 4 + index
Data Transfer Objects
Data Transfer Object 4
(Lp 1 Integral)
Address = RW 6 + index
Data Transfer Object 5
(Lp 1 Derivative)
Address = RW 8 + index
RW 0: (Lp 1 Set Point)
RW 2: (Lp 1 Hi Alarm)
RW 4: (Lp 1 Heat PB)
RW 6: (Lp 1 Integral)
RW 8: (Lp 1 Derivative)
RW 10: (Lp 1 Set Point)
RW 12: (Lp 1 Hi Alarm)
RW 14: (Lp 1 Heat PB)
RW 16: (Lp 1 Integral)
RW 18: (Lp 1 Derivative)
RW Memory
Recipe 2 (index = 10)
RW 20: (Lp 1 Set Point)
RW 22: (Lp 1 Hi Alarm)
RW 24: (Lp 1 Heat PB)
RW 26: (Lp 1 Integral)
RW 28: (Lp 1 Derivative)
Recipe 3 (index = 20)
Multi-State Switch
Address = LW 9200
“Recipe 1” = State 0 = 0
“Recipe 2” = State 1 = 10
“Recipe 3” = State 2 = 20
LW Memory
LW 9200: address index
2161: (Lp 1 Set Point)
1481: (Lp 1 Hi Alarm)
1891: (Lp 1 Heat PB)
1895: (Lp 1 Integral)
1897: (Lp 1 Derivative)
Controller Memory
Recipe 1 (index = 0)
Recipe Selector