IDEC MICROSmart FC6A Series Ladder Programming Manual page 432

19: PID C I
ONTROL NSTRUCTION
9. Status indicators
You can check the primary statuses for PID control with the colored indicators.
When a PIDA instruction is selected, the indicators in the following table are displayed.
Indicator Name
PID
AT
MANUAL
A1
A2
A3
A4
A5
A6
When a PIDD instruction is selected, the indicators in the following table are displayed.
Indicator Name
MANUAL
AUTO
CASCADE
PV Tracking
Kp Dependent
Kd
Kd Decay
10. Trend graph
When a PIDA instruction is selected, you can monitor the values of the process variable (PV), set point (SP), manipulated
variable (MV), alarm 1 value (process high alarm), and alarm 2 value (process low alarm) with the trend graph.
When a PIDD instruction is selected, you can monitor the values of the process variable (PV), set point (SP), and output
manipulated variable (MV) with the trend graph.
Shown values, colors, maximum value, and minimum value can be changed in the PID Monitor Settings dialog box.
For details, see "PID Monitor Settings Dialog Box" on page 19-44.
Note: When plots on the trend graph reach the right edge of the graph, the center of the graph moves to the left edge and the new log information
is displayed from the center of the graph. You can check the past log information by moving the scrollbar. The log information retains a maximum of
10,000 items of information. When the log information has reached 10,000 items of information, the log information is deleted from the oldest
items, and the new log information is recorded. The log information displayed on the trend graph is deleted when the dialog box is closed or when
the PIDA/PIDD instruction being monitored is changed.
19-42
Background Color
Gray PID control stopped
Green PID control is executed
Gray AT stopped
Green AT is being executed
Gray Auto mode
Green Manual mode
Gray Normal operation
Red Alarm 1 output is ON
Gray Normal operation
Red Alarm 2 output is ON
Gray Normal operation
Red Alarm 3 output is ON
Gray Normal operation
Red Alarm 4 output is ON
Gray Normal operation
Red Alarm 5 output is ON
Gray Normal operation
Red Alarm 6 output is ON
Background Color
Gray Other mode
Green Manual mode
Gray Other mode
Green Auto mode
Gray Other mode
Green Cascade control mode
Gray PV tracking disabled
Green PV tracking enabled
Gray Kp independent
Green Kp dependent
Gray Derivative action disabled
Green Derivative action enabled
Gray Derivative decay disabled
Green Derivative decay enabled
FC6A S MICROS
ERIES MART
Status
Status
L P M
ADDER ROGRAMMING ANUAL
FC9Y-B1726