EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

E36 Frequency Detection 2 (Refer to E31.) see page 4-94
E37, E38 Current Detection 2/Low Current Detection (Level and Timer) (Refer to E34.) see page4-95
E40, E41 PID Display Coefficient A, B
These function codes specify PID display coefficients A and B to convert a PID command (process command or
dancer position command) and its feedback into mnemonic physical quantities to display.
- Data setting range: -999 to 0.00 to 9990 for PID display coefficients A and B
• Display coefficients for PID process command and its feedback (J01 = 1 or 2)
E40 specifies coefficient A that determines the display value at 100% of the PID process command or its feedback,
and E41 specifies coefficient B that determines the display value at 0%.
The display value is determined as follows:
Display value = (PID process command or its feedback (%))/100 (Display coefficient A - B) + B
Example
Maintaining the pressure around 16 kPa (sensor voltage 3.13 V) while the pressure sensor can detect 0 to 30 kPa
over the output voltage range of 1 to 5 V:
Select terminal [12] as a feedback terminal and set the gain to 200% so that 5 V corresponds to 100%.
The following E40 and E41 settings allow you to monitor or specify the values of the PID process command and its
feedback on the keypad as pressure.
PID display coefficient A (E40) = 30.0, that determines the display value at 100% of PID process command or
its feedback
PID display coefficient B (E41) = -7.5, that determines the display value at 0% of PID process command or its
feedback
To control the pressure at 16 kPa on the keypad, set the value to 16.0.
4-96