Loading the PID filter values

The LM628 requires that the Proportional, Integral & Derivative (PID) filter values be loaded before it will move the servo (these default to 0 after reset, which will not move the servos). The ZY's client is responsible for this operation. Currently, the PID filter values must first be determined in the lab[12]. Once these values have been determined, the commands FLT, FIL, FKD, FKI, FKP and FSI can be used to update the appropriate LM628 controller. This can be done either by calling the ZY directly with these commands, or by placing them in the ZY's ZPXXX.INI file (see INITZY).