ABB LVP&S Training AC500 to EMAX Modbus RTU ABB Automation Technologies

Transcription

1 ABB LVP&S Training AC500 to EMAX Modbus RTU ABB Automation Technologies Revision Date: Feb 16,2009

2 Objective Using AC500 to communicate to Emax Breaker with Modbus RTU. This intermediate level course demonstrates how to connect an AC500 PLC to an Emax breaker. The student will wire an Emax breaker to a AC500 PLC with provided wiring diagrams. The student will also control and monitor Emax breaker with provided AC500 program (AC500_MODBUS_RTU_EMAX.pro). ABB Group

3 Required Items Required Items Emax Breaker with Trip Unit PR122/3 or PR332/3 Communication Module PR120/D-M AC500 PLC Program AC500_MODBUS_RTU_EMAX.pro AC500 PM5xx Instructional Manual Trip Unit Modbus System Interface (1SDC200005D0201.pdf) ABB Group

4 Overview ABB Group Hardware Connections Communication Parameters Memory mapping PLC program Evaluation Summary

5 Hardware Connections Hardware Connections Communication Module Inside Trip Unit Communication Module Pin 10 Pin 1 Rx/Tx + Rx/Tx - W1 & W2 is your Modbus RTU twisted pair ABB Group W1 is Rx/Tx Data Positive connected to Pin 6 W2 is Rx/Tx Data Negative Connected to Pin 5

6 Hardware Connections Emax Internal Hardware Connections External 24V Power Supply Provide 24V Power to Trip Unit Com Module to Terminal Strip W2 (Rx/Tx - ) Terminal K2 = 0V W1 (Rx/Tx + ) Terminal K1= +24V Emax Breaker ABB Group

7 Hardware Connections Emax Breaker internal circuit diagrams Optional Charging Motor, YC closing coil and YO opening coil Refer to Emax Technical Catalog (1SDC200005D0201) Wiring for Spring Charging motor if equipped YC wiring external circuit OR YC wiring through com module relay YO wiring external circuit OR YO wiring through com module relay ABB Group Communication Module PR120/D-M

8 Hardware Connections AC500 External Communication Connections AC500 COM1 OR W2 (Rx/Tx - ) Emax Breaker ABB Group W1 (Rx/Tx + )

9 Emax Communication Parameters Setting the Com Module address, baud rate, and com mode. In the Trip Unit display select <ESC> key. Go to Settings and select Com Module Select the Local option Default password is 0001 Once module is in Local hit <ESC> key to go back until you are prompted to save and confirm changes Go back to com module settings and select Address Set address to 70 Select Baud Rate Set baud rate to 19200kb/s Select Protocol Type Even, 8 data bits, 1 stop bit = E,8,1 Select Addressing Type Select Modbus Standard Place Com Module back in Remote and confirm changes ABB Group

10 PLC Communication Parameters PLC Com 1 port settings Baud Rate, Parity, Stop Bits must match Emax communication module settings Operation Mode must be set to Master ABB Group

11 Memory Mapping Emax Memory Mapping Index table ABB Group

12 Memory Mapping Memory Mapping Read Only Registers (Status) Example: Reading Parameter 101 (Word Address 101) If the Value = 16 then CB is closed means Bit 4 is ON (Addr 101 = = 16 decimal) ABB Group

13 Memory Mapping Memory mapping Read Only registers (Status) Example: Reading Parameter 1028 (Word Address 1028) If the Value = 70 then the Slave address is 70 ABB Group

14 Memory Mapping Memory Mapping Write Only registers Example: Command Value: Binary Decimal = Open 8 = Open = Close 9 = Close = Reset Trip 1 = Reset ABB Group Note: When writing a command you must write both Command Type and Command Parameter. This means you must sent a double word (32bits) at one time.

15 PLC Program Operating circuit breaker remotely When you Go online with the program AC500_MODBUS_RTU_EMAX.pro the correct breaker address should show on the top left corner of the HMI. Verify Address matches the breaker you want to operate remotely. Status Indicators * Breaker Com Module must be in remote to accept commands* ABB Group Commands

16 PLC Program Operating circuit breaker remotely Test operation of breaker by opening and closing ABB Group

17 Evaluation Was hardware connection content defined? Was memory mapping instructions defined? Did the PLC program communicate with the Emax? ABB Group

18 Summary The Course provided a quick-start guide to interfacing an AC500 PLC to an Emax Breaker. Modbus RTU communication protocal was used to communicate between the AC500 and Emax breaker. The Emax Memory Mapping table linked PLC memory addresses to breaker commands and parameters. The PLC program provided a user interface to execute commands and retrieve breaker parameters. ABB Group

19 Questions ABB Group