How to Control and Monitor a Motor Insight Overload Relay With an
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1. M21 contact in the program and Set On the bit to Trip Stop Motor Insight and open the 95 96 Fault Relay contact 8 View data addresses D500 through D515 to view the 16 data parameters being monitored with this ELC program Eaton Corporation g Electrical Group j 1000 Cherrington Parkway Moon Township PA 15108 m United States 877 ETN CARE 877 386 2273 PowerChain Eaton com Management 2008 Eaton Corporation PowerChain Management is a registered E iTo no All Rights Reserved trademark of Eaton Corporation Printed in USA Publication No AP04209001E 27931 All other trademarks are property of their Powering Business Worldwide December 2008 respective owners2. a Freedom Series contactor to a motor and will also show how to connect an ELC controller to a Motor Insight for control and monitoring over Modbus There are numer ous data parameters that may be monitored from Motor Insight including individual phase currents average of three phase currents individual phase voltages average of three phase voltages motor power voltage unbalance current unbalance power factor ground fault current frequency thermal capacity and a fault queue This application example monitors all of these data parameters with the ELC controller over Modbus Full control of Motor Insight is accomplished via Modbus serial from the ELC controller and the customer supplied field wiring An ELC message program is included with this application example This ladder logic program effectively sends a Read message followed by a Write message continu ously If a fault occurs the program will be notified immediately The program writes either a Reset command to Motor Insight to close the contact or a Irip command to open the contact Note The Reset command will instruct Motor Insight to de energize its internal relay which in turn energizes the contactor provided the customer supplied field wiring is satisfied see Figure 1 Sixteen different parameters are being continuously monitored from Motor Insight Application Data APO4209001E How to Control and Monitor a Motor Insight Overload Effective December 2008 Relay Wi
3. Application Data AP04209001E Effective December 2008 How to Control and Monitor a Motor Insight Overload Relay With an ELC Logic Controller via Modbus Serial ELN Powering Business Worldwide Application The purpose of this application paper is to demon strate how to control and monitor a Motor Insight motor protection relay operating in conjunction with a Freedom Series Contactor over Modbus serial Motor Insight includes a relay that works in series with customer field wiring capable of ener gizing and de energizing the contactor coil Motor Insight provides a high level of protection for the motor and will not enable the contactor to be closed if any condition exists that could damage the motor It will also open an energized contactor should such a condition occur while the motor IS running This application example uses an ELC Eaton Logic Controller to control and monitor Motor Insight over Modbus serial provided the customer supplied field wiring is satisfied The customer supplied field wiring could be any contact interlock that will remain open when a system requirement to run the motor is not met Any Modbus serial master may be used for controlling monitoring Motor Insight Overview Motor Insight is a motor protection relay that can be used with any contactor For this example it will be used with Eaton s Freedom Series contac tor This application note will show how to wire a Motor Insight with
4. Modbus Register Number 400 Modbus Data Address 399 This will enable Communication Loss behavior The 0x0088 will enable Motor Insight by default to report a fault and trip the contactor should a loss of communications occur The other choice is Hold Last State on a Communication Loss Figure 2 Logic Diagram This same process can be used to configure the RS 232 communi cation port 1 Use D1036 instead of D1120 for the baud rate parity stop bits and bits byte Select ASCII RTU mode with bit M1139 and Lock the Com1 settings with bit M1138 This is included in the Setting up the ELC Controller s Communication Port sample messaging program included with this application example The communication port for RS 485 communications is Port 2 It is recommended to add logic to the program to configure the port at first scan To accomplish this add the following to the control pro gram this is included in the program supplied with this application example 1 Under the Help pull down menu select Auxiliary Editing C then RS 485 Protocol Setting Select the interface parameters i e Baud Rate Parity Bits Byte and Stop Bits Then note the hexadecimal value for your choices For example 8 bits byte Even parity 1 stop bit and 19 2K baud results in a hex value of 97 Add a MOV instruction to your program to be executed at first scan to move H97 representing 97 Hex to register D1120 2 Assign a station number MOV K t
5. arameters need to be modified they may be modified via P 01 on the keypad or via a Modbus command Since Motor Insight only supports RTU mode only 8 bits byte are allowed The parity and number of stop bits may Protocol Setting D1120 H0097 be modified with a Modbus Write command or P 01 to Modbus Register 442 Modbus Data Address 441 as follows Value of 0 Even Parity 1 stop bit default Value of 1 Odd Parity 1 stop bit RS 485 Protocol Screen Value of 2 No Parity 2 stop bits The following logic can be used to configure the interface param Motor Insight Communication Loss Behavior eters for the ELC controller s communication port 2 By default when a communication loss occurs Motor Insight will hold last state and not indicate a fault The Modbus master s messages will time out indicating that communications is lost to the device P 04 is the Comm Loss Behavior parameter However 01120 8 dilsibyler even parity 1 stop bit 19 2 Kbaud this feature must be enabled to be used It cannot be enabled from First Scan Bit the keypad but only with a Modbus command If it is not enabled 1497 Station Nuraber4 Motor Insight will Hold Last State on a communication loss If it is enabled there are two choices 1 Fault on Comm Loss Default RTU Mode 2 Hold Last State on a Comm Loss Loek Comz setae To enable this feature Send a Modbus Write command with a value of 0x0088 to Motor Insight s
6. in 4 Data i l 311 310 n a Power Factor Serial Modbus Addresses in Motor Insight for Control and Monitoring 312 311 n a Ground Fault Current The Modbus Register address 1 Modbus Data Address The 313 ae n a Frequency Modbus Control Register in Motor Insight is 400 decimal and the 314 313 n a Motor Thermal Capacity Modbus Data Address for Control is therefore 399 decimal The 315 314 n a Fault Queue 1 address used is determined by the Modbus master The ELC Message Instructions use the Modbus Data Addresses to control Note There are many additional parameters that can be monitored from and monitor Motor Insight The values for energizing and de energiz Motor Insight Motor Insight may also be configured via serial Modbus ing a contactor controlled by Motor Insight are as follows in Table 1 commands Please refer to Chapter 8 Modbus Communications in the Motor Insight User Manual Publication MNO4209001E 2 EATON CORPORATION www eaton com How to Control and Monitor a Motor Insight Overload Application Data AP04209001E Relay With an ELC Logic Controller via Modbus Serial Effective December 2008 The ELC message program included with this Application Note 3 Bit M1143 determines ASCII mode verses RTU mode for the writes one register to Motor Insight for control and reads the port Set this bit for RTU mode and reset it for ASCII mode RTU 16 parameters listed in Table 1 mode must be used with Motor Insight Configuring Mot
7. o register D1121 where the is the station number EATON CORPORATION www eaton com 3 Application Data APO4209001E How to Control and Monitor a Motor Insight Overload Effective December 2008 Reference Number Serial Summary Detailed Procedure Table 2 Supporting Documentation If the Modbus master is an ELC controller the following procedure Documentation Reference Number should be straightforward If another Modbus Master is used be Manual sure it is properly configured and sends the same Modbus mes sages as the ELC controller in this example The steps to getting ELC System Manual alke aE this application example working are as follows Motor Insight User Manual MN04209001E 1 Configure Motor Insight s interface parameters per this Motor Insight Modbus Installation Leaflet IL04209002E application example Program Files 2 Make the RS 485 connections between the ELC controller ELC Message Program Motor_Insight epc and Motor Insight s Modbus module In the event additional help is needed please contact the Technical 3 Load the ELC program supplied with this application example Piseaurce Center at 1 87 LETNICARE to the ELC controller using ELCSoft 4 Put the ELC controller into the Run Mode 5 Go online with the ELC controller to view the program execution 6 Right click on the M20 contact and Set On the bit to Reset Motor Insight and close the 95 96 Fault Relay contact 7 Right click on the
8. or Insight for Modbus Communications 4 These settings must then be locked by setting bit M1120 Please refer to the Motor Insight module s User Manual Publication Note All interface parameters except the Station Number must be set the MN04209001E for information on configuring Motor Insight for the same for all devices to properly communicate with each other Each device motor it will be protecting and other features For this example the USt have a unique Station Number ELC controller s Modbus port is configured for the following interface parameters 19 2K baud 8 bits byte 1 stop bit even parity RTU mode Motor Insight Modbus module must be configured with the exact same interface parameters except the Modbus address The ELC is node 1 and Motor Insight is node 2 on Modbus for this example Teenie Bo Close The master on Modbus must support RTU mode Motor Insight atalength 3 hss __ Close does not support ASCII mode An example of the RS 485 Protocol Screen is shown below RS 485 Protocol Setting Parity Even The Modbus interface parameters that need to be configured for Motor Insight are located under the Operation parameters on the l unit The Modbus Address is called the Device Address The Baud Stop Bits f bit Rate is located under the Advanced section parameter P 00 8 bits byte even parity and 1 stop bit are the defaults and do not need Eaud Fate to be changed for this example If these three p
9. th an ELC Logic Controller via Modbus Serial Motor Insight Power Wiring Diagram ee Customer Supplied Wiring Figure 1 Power Diagram with Customer Field Wiring Between Terminals 2 and 3 Note VWWhen a Reset command is issued to Motor Insight it will be enabled Table 1 Values to close the contactor provided the customer supplied field wiring is satisfied Modbus Modbus P Register Data art Numbers Used for this Application Example a kae TERI Desorption A AE r ae ARA E R 400 399 0x00DD Command Register Relay OFF 1 C441M Modbus interface module for Motor Insight 400 399 0x00AA Command Register Reset Energize Relay 1 CN15DN3 Freedom Series Contactor 300 239 n a Phase A rms Current 1 ELC PC12NNDR ELC Controller Modbus master Port 2 301 300 n a Phase B rms Current 1 ELC PSO1 ELC power supply 302 301 n a Phase C rms Current Shielded cable for RS 485 Modbus connections between 303 302 n a Average rms Current Serial Modbus Connections from ELC Controller to 305 304 n a Phase B rms Voltage L1 L2 Motor Insight 306 305 n a Phase C rms Voltage L1 L2 ELC PC12NN i E DA MOLONS GAT MOOSUS 307 306 n a Average rms Voltage Port 2 connections Modbus module connections l 308 307 n a Motor Power kW Scaling x100 pin 1 Common l l 309 308 n a Voltage Unbalance terminal _ ______ pin 2 Data 310 309 n a Current Unbalance terminal ____ ____ p
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