5.4 Details of Function Codes
5-155
Details of
Function Codes
F codes
E34 to E41
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chapter 5 Function Code
E40, E41
PID Display Coefficient A, B
This function displays the PID command (process/dancer basic position), PID feedback value, or analog
input monitor by converting to the easy-to-understand physical quantities to display.
- Data setting range: (PID display coefficients A and B, -999 to 0.00 to 9990
Display coefficients for PID process command and PID feedback (J01 = 1 or 2)
E40 sets the PID display coefficient A "display when PID process command/PID feedback value is 100%,"
and E41 sets coefficient B "display when PID process command/PID feedback value is 0%."
The display value is determined as follows:
Display value = (PID process command value or PID feedback value (%))/100 x (Display coefficient A - B) +
B
Fig. 5.4-68
Ex.) When the pressure sensor is 1 to 5 V output and can detect 0 to 30 kPa, and when willing to control
the pressure at 16 kPa (sensor output 3.13 V)
Select terminal [12] as a feedback terminal and set the gain to 200% so that 5 V corresponds to
100%.
PID process command, display of PID feedback value at 100% = PID display coefficient A (E40) =
30.0
PID process command, display of PID feedback value at 0% = PID display coefficient B (E41) =
-7.5
By setting as above, the monitor and keypad setting of the PID process command value and PID
feedback value can be recognized as the pressure values. To control the pressure at 16 kPa on the
keypad, set the value to 16.0.
Fig. 5.4-69
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