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For single-channel PID implementations, any changes you make to the PID parameters on the host VI take effect immediately on the FPGA target. To configure the PID (FPGA) Express VI for a single-channel implementation, enter 1 in the Number of channels control on the configuration dialog box. Implementing a Single-Channel PID on FPGA Targets Note The PID (FPGA) Express VI is available only if you install the LabVIEW FPGA Module. Refer to the VI topic for details about the algorithm the VI uses. The PID (FPGA) Express VI implements a fixed-point PID algorithm. You can use the PID (FPGA) Express VI to implement single-channel or multi-channel PID on a LabVIEW FPGA target.