Application macros 85 Return fanThis macro configures for return fan applications where the return fan removes airaccording to signals received from a transducer. When using direct speed referencein AUTO mode or process PID, see General considerations on page 80.For more information see Default values with different macros on page 279.Parameters changed relative to HVAC defaultParameter Value9902 APPLIC MACRO 3 (RETURNFAN)1401 RELAY OUTPUT 1 7 (STARTED)1609 START ENABLE 2 5 (DI5)1 SCR2 AI13 AGND4 10V5 AI26 AGND7 AO18 AGND9 24V10 GND11 DCOM12 DI113 DI214 DI315 DI416 DI517 RO1C18 RO1A19 RO1B20 DOSRC21 DOOUT22 DOGNDExternal reference 0(2)…10 V or 0(4)…20 mAReference voltage 10 VDCOutput frequency: 0(4)…20 mAStart/Stop: Activate to start driveRun permissive: Deactivate to stop drive (P 1601)Constant (Preset) speed 1 (P 1202)Safety interlock1: Deactivate to stop drive (P 1608)Safety interlock2: Deactivate to stop drive (P 1609)Relay output 1 (P 1401)Default operation: Started =>17 connected to 19Digital output, max. 100 mA (P 1805)No fault [Fault(-1)] =>20 connected to 22X1AAnalog input circuit commonPID feedback: 0(2)…10 V or 0(4)…20 mAAnalog output circuit commonAuxiliary voltage output +24 VDCAuxiliary voltage output commonDigital input common for allSignal cable shield (screen)Analog input circuit common+mA+X1B
