Danfoss HVAC Drive FC 102 Series Instructions Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

2 Instructions2.1.1 Abbreviations and DefinitionsACK AcknowledgeADF Internal Floating PointsADI Internal IntegersAI Analog InputsAO Analog OutputsBI Binary InputsBO Binary OutputsCOS Change Of StateFC Frequency ConverterHPFB High Performance Field BusJCI Johnson Controls Inc. developers of the METASYS N2 protocolN2 METASYS N2N2masterA N2 master is either a PC with JCI software or a dedicated JCIcontrollerNAK Not acknowledgedNPA N2 Point Address (Each N2 Point Type has a address rangefrom 0 to 255)NPT N2 Point TypePAR Parameter Number2.1.2 Network ConnectionConnect signal wires to terminal 68 (N+) and terminal 69 (N-)on main control board of the drive. If shielded cabling is used,connect one end of the shield to terminal 61. This terminal isconnected to ground via an internal RC link. It is highlyrecommended to use shielded twisted-pair cables to reducethe differential mode interference between the conductors.Danfoss do not take any responsibility for consequences, ifunshielded or untwisted cables are used.Torque Specifications: 4.5 in.lb. (0.5 Nm) if screw terminal is usedControl wire: 18 - 24 AWG, shielded, twisted pair2.1.3 Hardware Set-upRS-485 Bus Connection:One or more frequency converters can be connected to acontrol (or master) using the RS-485 standardized interface.Terminal 68 is connected to the P signal (TX+, RX+), whileterminal 69 is connected to the N signal (TX-,RX-). If more thanone frequency converter is connected to a master, use parallelconnections.130BA060.1168 69 68 69 68 69RS 485RS 232USB +-1 2S801ON130BA272.11Illustration 2.1: Bus termination switchNOTEThe factory setting for the dip switch is OFF.In order to avoid potential equalizing currents in the screen,earth the cable screen via terminal 61, which is connected tothe frame via an RC-link.Bus termination: The RS-485 bus must be terminated by aresistor network at both ends. For this purpose, set switchS801 on the control card to "ON". For more information, seethe paragraph: Switches S201, S202 and S801.Instructions VLT® MetasysMG.11.G2.02 - VLT® is a registered Danfoss trademark 32 2