Instruction Manual

Application Notes D-7

PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual

Publication 22C-UM001I-EN-P

Invert Function

For a 4-20mA signal, the following parameter settings are used so that a

20mA signal = 0% PID Reference and a 4mA signal = 100% PID

Reference.

• T069

[Analog In 1 Sel] or T073 [Analog In 2 Sel] = 1 “Current

Mode 4-20 mA”

• T070

[Analog In 1 Lo] or T074 [Analog In 2 Lo] = 100.0%

• T071

[Analog In 1 Hi] or T075 [Analog In 2 Hi] = 0.0%

• A152 [PID Ref Sel] = 2 “Analog In 1” or 3 “Analog In 2”

PID Deadband

Parameter A158 [PID Deadband] is used to set a range, in percent, of the

PID Reference that the drive will ignore.

Example

• [PID Deadband] is set to 5.0

• The PID Reference is 25.0%

• The PID Regulator will not act on a PID Error that falls between 20.0

and 30.0%

0102030405060708090100

PID Reference (%)

4-20mA Input