RS-485 User's Manual MEH448d - Fuji Electric America

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1.1 Features The functions listed below can be implemented using RS-485 communications. 1-1 1.1 Features - The keypad can be mounted on the easy-to-access front of control panel with an extension cable (option). - The function code data of the inverter can be edited and the operation status of the inverter can be monitored by connecting it to a personal computer on which inverter support software runs (see the "FRENIC Loader Instruction Manual"). - The inverter can be controlled as a subordinate device (slave) by connecting it to an upper level device (host (master)) such as a PLC or personal computer. As the communications protocols for controlling inverter, the Modbus RTU widely used by a variety of appliances, and the Fuji general-purpose inverter protocol common to Fuji's inverters are available. Modbus RTU protocol The Modbus RTU protocol is a set of communications specifications defined to connect Modicon's PLCs (Programmable Logic Controllers) in a network. A network is established between PLCs or between a PLC and another slave unit(s) (inverter(s), etc.). The main functions include: - supporting both a query-response format and a broadcast format for messages. - enabling the host unit as the master to transmit queries to each inverter as a slave, and each slave to send back responses to the queries to the master. - supporting two modes, RTU mode and ASCII mode, as transmission mode for the standard Modbus Protocol. FRENIC-Mini/Eco/Multi supports the RTU mode only, which provides a high transmission density. - performing an error check through a CRC (cyclic redundancy check) to ensure accurate data transmission. Fuji general-purpose inverter protocol This protocol is commonly used for all models of Fuji's general-purpose inverters. The main functions include: - enabling, as a common protocol, operation of all models of Fuji's general-purpose inverters with the same host program (function codes cannot be generally edited because specifications are different among models). - adopting fixed-length transmission frames as standard frames to facilitate developing communications control programs for hosts. - reducing the communications time in response to operation commands and frequency setting which are required quick response by using optional transmission frames. - Since the protocol switches to the keypad dedicated protocol automatically by connecting the keypad, it is not necessary to set up the communications- related functions. - Although the FRENIC Loader uses a dedicated protocol for loader commands, part of the communications conditions must be set. (For further information, see the " FRENIC Loader Instruction Manual.") - With regard to a FRENIC-Mini that uses inverter ROM 0399 or earlier version, part of the RTU protocol functions are restricted. Contact us for these restrictions. Confirm the ROM version according to the menu "5_14" described in "3.2.2 [5] Reading Maintenance Information" under Chapter 3 of the FRENIC-Mini Instruction Manual (INR-SI47-0791-E). Chap. 1 OVERVIEW
1.2 List of Functions The functions listed below become available by operating the appropriate function codes from the host controller. The chapters that follow describe these functions in detail. Table 1.1 List of RS-485 communications functions Function Description Operation The functions equivalent to the terminal functions shown below can be executed through communications: -Forward operation command "FWD" and reverse operation command "REV" -Digital input commands ([FWD], [REV], [X1] - [X9] terminals) (The number of X terminals varies with the inverter model.) -Alarm reset command ("RST") Frequency Either of the following three setting methods can be selected: setting -Set up as "±20000/maximum frequency." -Frequency (adjustable unit: 0.01 Hz) without polarity -Rotation speed (adjustable unit: 1r/min) Only MEGA has a polarity. PID command -Set up as "±20000/100%." Operation The items below can be monitored: monitor -Frequency command -Actual values (frequency, current, voltage, etc.) -Operation status, information on general-purpose output terminals, etc. Maintenance The items below can be monitored: monitor -Cumulative operation time, DC link voltage -Information to determine the service life of parts to be periodically replaced (main circuit capacitor, PC board capacitor, cooling fan) -Model codes, capacity codes, ROM version, etc. Alarm monitor The items below can be monitored: -Monitoring alarm history (last four alarms) -Monitoring information when an alarm occurs (last four alarms) Operation information (output/set frequencies, current, voltage, etc.) Operation status, information on general-purpose output terminals Maintenance information (cumulative operation time, DC link voltage, heat sink temperature, etc.) 1-2 Related function code S codes (dedicated to communications) M codes W codes X codes Z codes (dedicated to communications) Function code All types of function code data can be monitored and changed. All function codes other than above
Page 1 and 2: MEH448d
Page 3 and 4: Copyright © 2002-2009 Fuji Electri
Page 5 and 6: FRENIC-Multi Name Document number D
Page 7 and 8: CHAPTER 1 OVERVIEW1 Table of Conten
Page 9 and 10: CHAPTER 7 Metasys N2 (N2 PROTOCOL)1
Page 14 and 15: CHAPTER 2 COMMON SPECIFICATIONS Thi
Page 16 and 17: 2.1 Specifications of RS-485 Commun
Page 18 and 19: 2.1.1 Specification of the RJ-45 co
Page 20 and 21: 2-5 2.1 Specifications 2.1.3 RJ-45
Page 22 and 23: 2.1.4 Specification of connection c
Page 24 and 25: 2-9 2.2 Connections (2) Connection
Page 26 and 27: 2-11 2.2 Connections (4) Multidrop
Page 28 and 29: (a ) RS-485 communications card (fo
Page 30 and 31: 2.2.3 Devices for connection 2-15 2
Page 32 and 33: Separating the grounding 2-17 2.2 C
Page 34 and 35: 2.3.2 Link functions (operation sel
Page 36 and 37: 2-21 2.3 Switching to Communication
Page 38 and 39: Baud rate (y04, y14) Set a baud rat
Page 40 and 41: 2.5 Selecting the Method of Storing
Page 42: CHAPTER 3 Modbus RTU PROTOCOL This
Page 45 and 46: 3.1.3 Message frames As shown below
Page 47 and 48: 3.1.4 Message categories There are
Page 49 and 50: How to set a query - When the stati
Page 51 and 52: Interpretation of normal response -
Page 53 and 54: Interpretation of normal response -
Page 55 and 56: 3.2 Host Side Procedures 3.2.1 Inve
Page 57 and 58: 3.2.3 Receiving preparation complet
Page 59 and 60: 3.3.2 Operations in case of errors
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When y02 = 3 (mode in which the inv
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START Initial setting Remainder R
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Table 3.13 CRC data calculation tab
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4.1 Messages 4.1.1 Message formats
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Byte Field ASCII format Value Table
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Table 4.3 ACK frame 4-5 4.1 Message
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[2] Optional frame This section des
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Byte Polling response frame [invert
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4.1.3 Descriptions of fields [1] Co
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4.1.4 Communications examples 4-13
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4.2 Host Side Procedures 4.2.1 Inve
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4.3 Communications Errors 4.3.1 Cat
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CHAPTER 5 FUNCTION CODES AND DATA F
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5.1.2 Command data [1] List of comm
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[3] Operation command data Table 5.
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Table 5.5 Relation between operatio
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[5] Universal DO and universal AO (
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Table 5.9 Monitor data 1 function c
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Table 5.11 Monitor data 1 function
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Table 5.13 Monitor data 1 function
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Table 5.14 Keypad-related function
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*1 Operation command source code In
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5.2 Data Formats 5.2.1 List of data
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Table 5.18 List of data format numb
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Code Table 5.19 List of data format
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Data format [7] Decimal data (posit
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Data format [11] Capacity code (uni
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Data format [17] Model code 15 14 1
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Data format [23] Polarity + decimal
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Data format [40] Alarm factor 15 14
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Data format [68] Frequency command
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===Appendix=== CHAPTER 6 FLOOR LEVE
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6.1 Messages 6.1.1 polling/selectin
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6.5 Strategies 6.5.1 Monitoring 6-3
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6.6.5 Analog Inputs monitor 6-5 6.6
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Point Number Point Type Table 6.3 P
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Table 6.4 Point Database for FLN. P
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It is similar for the lower limit v
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7.1 Messages 7.1.1 Transmission Spe
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7.4 Read / Write Parameter Read Par
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Support Command List 2 Message Comm
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Support Command List 4 Message Comm
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Fuji Electric Systems Co., Ltd. Sta
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RS-485 User's Manual MEH448d - Fuji Electric America

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