Frequency Inverter DF51... - Moeller.com.tr

Serial interface (Modbus)04/07 AWB8230-1541GBParameter settings for ModbusPrerequisites for correct operation with Modbus-RTU are:• The PLC (master) is fitted with a serial interface RS 485 and withthe required driver software for Modbus-RTU.• The parameters of the DF51 frequency inverters (slaves) are setfor <strong>com</strong>munication via Modbus. For reliable setting of someuser-defined parameters, you will need the master’s (i.e. thehost PC’s) settings, such as the baud rate.hhParameters PNU C071 to C078 can not be alteredthrough the bus. They must be initially set using a keypad(DEX-KEY-…) or a PC.The values in the “Required settings” column (such asbaud rate, bus address and parity) must be taken intoaccount for <strong>com</strong>munications through Modbus.Table 37:Required parameter settingsPNU Run b031= 10A001 – – Reference value sourceselectionA002 – – Start signal sourceselectionb089 j j Display value with afieldbus module(RS 485)C071 – j Communication – baudrateC072 – j Communication –addressMeaning Value range DS Page Required settings00: Potentiometer (keypad) 01 81 0301: Analog input: control signalterminals O and OI02: Functions PNU F001 or A02003: Serial interface (Modbus)10: Calculator (calculated value ofCAL)01: Digital input (FWD/REV) 01 72 0302: Start key (keypad)03: Serial interface (Modbus)01: Output frequency (d001) 01 14702: Output current (d002)03: Direction of rotation (d003)04: Actual value (PV) (d004)05: State of digital inputs (d005)06: State of digital outputs (d006)07: Scaled output frequency (d007)04: 4800 bit/s 06 146 Dependent on the setting of05: 9600 bit/sthe PLC (master) setting06: 19200 bit/s1…32 1 146 Individual address innetwork.Each address must beunique.C074 – j Communication – parity 00: None 00 146 Dependent on the PLC01: Even(master)02: OddC075 – j Communication – stopbits1: 1 bit 1 146 Dependent on the PLC (host,2: 2 bitsmaster)146