IDEC MICROSmart FC6A Series Ladder Programming Manual page 405

4. Maximum Value, 5. Minimum Value
When Analog Output is specified for Output Manipulated Variable
This setting is disabled.
When Data Register is specified for Output Manipulated Variable
A value that is the PIDA instruction output manipulated variable having undergone linear conversion in the range of
maximum value (4) and minimum value (5) is stored in the set data register.
6. Output Manipulated Variable Limit
Set the output manipulated variable by restricting the manipulated variable calculated by the PIDA instruction.
When Disabled
The manipulated variable calculated by the PIDA instruction is the output manipulated variable.
When Enable (upper and lower limits)
When the manipulated variable calculated by the PIDA instruction exceeds the output manipulated variable upper limit or
lower limit, the upper limit value or the lower limit value is set as the output manipulated variable.
When Enable (percentage)
The result of the manipulated variable calculated by the PIDA instruction multiplied by 1 to 99% is set as the output
manipulated variable. The output manipulated variable lower limit (8) is disabled at this time.
7. Output Manipulated Variable Upper Limit/percentage (S1+14)
When Output manipulated variable restriction is Output manipulated variable (upper limit, lower limit)
Set the upper limit value of the output manipulated variable for the control output. When the manipulated variable
calculated by the PIDA instruction is higher than or equal to the output manipulated variable upper limit value, the set upper
limit value is set as the output manipulated variable for the control output. When setting the output manipulated variable
upper limit value, you must set the output manipulated variable upper limit value so that it satisfies output manipulated
variable lower limit value < output manipulated variable upper limit value.
The output manipulated variable upper limit value can be set from 0 to 100% in 1% increments.
When Enable (percentage)
Set the percentage of the output manipulated variable. The result of the manipulated variable calculated by the PIDA instruction multiplied
by 1 to 99% is set as the output manipulated variable. The output manipulated variable (percentage) can be set from 1 to 99% in 1%
increments.
Output manipulated variable = manipulated variable calculated by the PIDA instruction x output manipulated variable (scaling factor)
8. Output Manipulated Variable Lower Limit (S1+15)
When Enable (upper and lower limits)
Set the lower limit value of the output manipulated variable for the control output. When the manipulated variable calculated by the
PIDA instruction is lower than or equal to the output manipulated variable lower limit value, the set lower limit value is set as the
output manipulated variable for the control output. When setting the output manipulated variable lower limit value, you must set the
output manipulated variable lower limit value so that it satisfies output manipulated variable lower limit value < output manipulated
variable upper limit value. The output manipulated variable lower limit value can be set from 0 to 100% in 1% increments.
When Enable (percentage)
The output manipulated variable lower limit is disabled.
9. Manual Mode Output MV (S1+17)
Set the output manipulated variable for manual mode. To enable this function, Auto/manual mode (S3+1) must be turned on.
The manual mode output manipulated variable is enabled for the output manipulated variable, the output manipulated variable
(digital value), and the control output.
For switching between auto/manual mode, see "Auto/manual mode (S3+1)" on page 19-21.
When the output manipulated variable limit is Output manipulated variable (upper limit, lower limit), the manual mode
output manipulated variable must be set between output manipulated variable lower limit value and output manipulated variable
upper limit value. The manual mode output manipulated variable can be set from 0.00 to 100.00% in 0.01% increments.
10. Output MV Rate-of-Change (S1+16)
Set the output manipulated variable to change in a second. When the output manipulated variable rate of change is 0%/second,
this function is disabled.
When the difference between the set point and process variable is large, the normal output switches from off to on as shown in
the diagram on the next page, but by setting the output manipulated variable rate of change, the rate of change for the output
manipulated variable can be changed as shown in the diagram on the next page.
The output manipulated variable rate of change can be set from 0 to 100%/second in 1% increments.
Normal output
ON
OFF
Output when the output manipulated variable rate of change is set
100% s 20% s
1 s 5 s
FC6A S MICROS
ERIES MART
10% s
10 s
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ADDER ROGRAMMING ANUAL
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