MCD3 PROFIBUS communication protocol

ContentsInstallation and configuration...............................................................................................................................................................3 Input parameter (32bytes)......................................................................................................................................................................5 Parameter output (2bytes).....................................................................................................................................................................6MCD3 low voltage soft starterVEDA MCInstallation and configurationThis document outlines the Profibus serial communication protocol for digital medium voltage soft starters (MCD3) Profibus serial communication of MCD3 is mainly designed for data exchange. The local bus can read the current parameters of the MCD3 medium voltage soft starter, and can also control the 3 functions of the MCD3 medium voltage soft starter; 1. Start/stop relay 2. Double regulation 3. Fault reset It can be set that the MCD3 medium-voltage soft starter only supports the host computer to read the current parameters of the soft starter, without functional control. When the MCD3 is equipped with a Profibus module, it contains an internal relay board, the relay (K1) is controlled through the LAN, and its output (normally open) contact can be used to start/stop the soft starter. When configuring the Profibus module, support the standard GSD configuration file. When it is detected that the tripping flag in the Logic status parameter (input parameter #1) is 1, the host should write the stop command (5A00) immediately, so as to avoid the soft starter malfunctioning after the fault is reset!Before connecting the serial communication, the HPMV-DN soft starter must be reliably grounded, otherwise the serial communication hardware may be damaged! The screenshot of the configuration example:The screenshot of the configuration example:The screenshot of the catalog example:3MCD3 low voltage soft starterVEDA MCThe ofof the catalog example: Thescreenshot screenshot the catalog example:local bus interface The MCD3 control unit includes a 9-pin socket Pin Socket 1 2 3 4 5 6 7 8 9 Set up The PRFIBUS-DP module of the MCD3 medium-voltage soft starter needs to set the communication parameters (modbus), the baud rate is 9600, the even parity, and the station number is 1. baud rate Support all Profibus standard baud rates from 9.6K bit/Sec to 12M bit/Sec terminal The MCD3 Profibus module does not include a termination circuit. When the MCD3 is used as the initial or final node of the network, an external termination circuit must be used. node address The node address should be set before setting the MCD3 module. The node address can be set between 1-99 by setting the rotary switch on the communication module. Name Shield Unused Unused B-Line Unused Unused Unused Unused A-Line Unused Negative polarity receiving end RxD/transmitting end TxD (according to RS485 standard) Positive polarity receiving end RxD/transmitting end TxD (according to RS485 standard) Connecting to the base4MCD3 low voltage soft starterVEDA MCInput parameter (32bytes)Input parameter Parameter Logic status No. 1-2 Description Current logical state of MCD3 d15: MCD3 trip d14: motor stop d13: During soft stop d12: During soft start d11: motor running d10: double parameter on d09: work in energy saving mode d08: work in forward slow mode d07: work in reverse slow mode d06: insulation alarm d05.. ,d00: not used Current current (unit: %FLA) Current inlet wire (unit: V) 1 : normal 0 : abnormal MCD3 current control signal input status: D15...D8: not used D7: External fault input 2, 20# input terminal D6: External fault input 1, 19# input terminal D5: reserved D4: Programmable input, 8# input terminal; (0: double adjustment, 1: reset) D3: Programmable input, 7# input terminal; (0: test, 1: reset) D2: Soft start input, 6# input terminal D1: Soft stop input, 5# input terminal D0: stop (emergency stop), 4# input terminal MCD3 internal DIP switch setting state D15...D8: not used D7..D0: DIP switch setting state See the operation manual for details Electrode insulation resistance (need to configure the insulation test test option) Controls the logic state before power failure See logic state description MCD3 total running time(Hour) MCD3 total start times The time of the previous start process (second) Peak current during previous start MCD3 has frequent starting faults, and the required waiting time MCD3 total trip times MCD3