Mitsubishi Electric FR-F800 Series Instruction Manual page 433

 PID monitor function
• This function displays the PID control set point, measured value and deviation on the operation panel, and can output these
from the terminals FM/CA and AM.
• An integral value indicating a negative % can be displayed on the deviation monitor. 0% is displayed as 1000. (These
values cannot be output on the deviation monitor from terminals FM and CA.)
• Set the following values to Pr.52 Operation panel main monitor selection, Pr.774 to Pr.776 (Operation panel monitor
selection), Pr.992 Operation panel setting dial push monitor selection, Pr.54 FM/CA terminal function selection
and Pr.158 AM terminal function selection for each monitor.
Parameter Monitor
Setting description
52 PID set point
Second PID set
92 point/deviation
input selection
PID measured
53
value
Second PID
93
measured value
PID measured
67
value 2
Second PID
95
measured value 2
54 PID deviation
Second PID
94
deviation
PID manipulated
91
amount
Second PID
96 manipulated
amount
*1 When C42 (Pr.934) and C44 (Pr.935) are set, the minimum increment changes from unit % to no unit, and the monitor range can be changed.
(Refer to
*2 When the minus value display is set disabled using Pr.290, the terminal AM output becomes "0".
 Adjustment procedure
Enable PID control
Setting the parameter
PID gain tuning
Terminal setting
Turn the X14 signal ON
432
5. PARAMETERS
5.11 (A) Application parameters
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Minimum
Terminal FM/
increment
0.1%
0% to 100%
0.1%
0% to 100%
0.1%
0% to 100%
Setting not
0.1%
available
Setting not
0.1%
available
page 442.)
When Pr.128 ≠ "0", PID control is enabled.
Set the set point, measured value and deviation input methods at Pr.128, Pr.609 and
Pr.610.
Adjust the PID control parameters of Pr.127, Pr.129 to Pr.134, Pr.553, Pr.554, Pr.575
to Pr.577.
Pr.129, Pr.130 and Pr.134 are adjusted automatically by PID gain tuning. (Refer to
437.)
Set the I/O terminals for PID control. (Pr.178 to Pr.189 (Input terminal function
selection), Pr.190 to Pr.196 (Output terminal function selection))
When the X14 signal is assigned to the input terminal, PID control is enabled by the X14
signal turning ON.
Operation
search engine
Monitor range
Terminal Operation
CA AM panel
*1
*1
*1
900% to
1100%
-100% to
or
*1*2
100%
-100% to
*1
100%
900% to
1100%
-100% to
or
*2
100%
-100% to
100%
Remarks
"0" is displayed at all times when PID control
is based in deviation input.
Displays PID measured value even if the PID
control operating conditions are not satisfied
while the PID control is enabled.
"0" is displayed at all times when PID control
is based in deviation input.
Using Pr.290 Monitor negative output
selection, negative values can be output to
the terminal AM and displayed with a minus
sign on the operation panel (FR-DU08).
When signed indication is invalid, the
indicated values are from "900%" to "1100%"
on the operation panel. (0% is offset and
displayed as "1000%".)
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