u Other FunctionalityEach of the following functions must be enabled during drive startup:Enable the drive to runRUN ENABLE (Point 35) can be commanded to require the drive to have a physical input (DI-2) set before the drive can run.This works in conjunction with CMD RUN.STOP (Point 24) or the CMD REV.STOP (Point 22). If RUN ENABLE (Point35) is commanded ON then terminal for DI-2 does not need to be on and CMD RUN.STOP (Point 24) or CMD REV.STOP(point 22) needs to be commanded ON for the drive to run. If, on the other hand, RUN ENABLE (Point 35) is commandedOFF, then to run the drive the input terminal for DI-3 needs to be on and either CMD RUN.STOP (Point 24) or CMD REV.STOP(Point 22), needs to be commanded ON.Start and stop the driveCMD RUN.STOP (Point 24) can be commanded to run the Bypass in the forward direction. STOP.RUN (Point 23) shows thecurrent status of the Bypass.Change directionsCMD REV.STOP (Point 22) can be commanded to run the drive in the reverse direction (ignored in Bypass Mode). FWD.REV(Point 21) shows the current direction of the drive rotation.NOTICE: Improper drive direction may damage HVAC equipment if parameter b1-04, Reverse Enable, is improperly set (b1-04 = 0).Digital OutputsMULTI OUT 1 (Point 40), MULTI OUT 2 (Point 41), and MULTI OUT 3 (Point 42) are physical digital outputs on the Bypass(DO-7 through DO-9). Their purpose depends on how the Bypass has been set-up. The Bypass can be programmed so thatthese points can display various limits, warnings, and status conditions. Some examples include HOA state, Drive or BypassMode, Fault Active, and Loss of Load detected.Loop gainPID P GAIN (Point 63) and PID I TIME (Point 64) are the gain and integral time parameters similar to the P and I gains inthe APOGEE Terminal Equipment Controllers. The Z1000 Bypass’s PI loop is structured differently than the Siemens loop,so there is not a one-to-one correspondence between the gains.Reading and resetting faultsOK.FAULT (Point 93) shows the current status of the Bypass. FAULT CODE (Point 17) contains the code for the most currentfault. LST FLT CODE (Point 66) contains the code for the previous drive fault. See table below for descriptions of the faultcodes. The drive can be reset back to OK mode by commanding RESET FAULT (Point 94) to RESET.E.3 Slope and Intercept Conversion412 YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
