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User Manual

Modbus TCP/EtherNet IP Gateway

GT200-MT-EI

WWW.SSTCOMM.COM

34

6 Working Principle of Modbus TCP Slave

6.1 Working Principle

Data exchange of Modbus TCP and EtherNet/IP of GT200-MT-EI is set up through “mapping”. There are

two data buffer areas, one is EtherNet/IP network input buffer and the other is EtherNet/IP network output buffer.

Network input and output buffer is all for EtherNet/IP. When the gateway is Modbus TCP slave, Modbus write

register command will write the read data to the network input buffer for EtherNet/IP accessing. Modbus read

command gets data from network output buffer and export to the Modbus TCP master equipment through

response message.

The gateway acts as Modbus TCP slave, support function: 03H, 04H, 06H and 10H.

Network input buffer is Modbus TCP master output at the Modbus TCP side. It is mapped to the Modbus

read holding register. Users can use No.3 command to read back. It supports 03H, 06H and 10H function code.

Register starting address is 40001(0).

Network output buffer is Modbus TCP master input. It is mapped to Modbus input register. Users can use

No.4 function code to read data. It supports 04H function code. Register starting address is 30001 (0).

6.2 Network Status Monitor

When the gateway acts as Modbus TCP slave, it has the network status monitor function. Described as

Network input buffer

Network output buffer

… …

0004H

0001H

0000H

0002H
0003H

0005H
0006H

0006H

0004H

0001H
0002H

0000H

0003H

0005H

… …

Modbus
Write command 06,10H

Modbus
read command: 04H

Modbus
read command: 04H

Modbus
read command: 03H

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Содержание GT200-MT-EI

Страница 1: ...Modbus TCP EtherNet IP Gateway GT200 MT EI User Manual REV 1 4 SST Automation E mail SUPPORT SSTCOMM COM WWW SSTCOMM COM ...

Страница 2: ...r Interface 12 4 3 Equipment View Operation 14 4 3 1 Equipment View Interface 14 4 3 2 Equipment View Operation Mode 14 4 3 3 Equipment View Operation Types 15 4 4 The Operation of Configuration Interface 16 4 4 1 EtherNet IP Configuration View Interface 16 4 4 2 Modbus TCP Configuration View Interface 17 4 4 3 Node Configuration View Interface 19 4 4 4 Command Configuration View Interface 20 4 4 ...

Страница 3: ...1 Working Principle 34 6 2 Network Status Monitor 34 7 EtherNet IP Connection Parameters Set 36 8 How to Read Write I O Data using MSG 37 8 1 Read I O Data 37 8 2 Write I O Data 41 9 Typical Application 48 9 1 EtherNet IP master PLCs interconnect with Modbus TCP master PLCs 48 9 2 Modbus TCP slave devices connect to EtherNet IP network 49 10 Installation 50 10 1 Machine Dimension 50 10 2 Installat...

Страница 4: ...IP network 1 2 Product Features Modbus TCP master or slave optional EtherNet IP slave Redundant power Support network status monitor function Support I O data monitor function Provide easy to use configuration software SST EE CFG 1 3 Technical Specifications 1 One Ethernet interface Modbus TCP and EtherNet IP shares this interface together 2 Ethernet 10 100M self adaptive 3 IP address conflict det...

Страница 5: ...H 10H 8 Act as slave at the Modbus TCP side support 36 TCP connections support function code 03H 04H 06H 10H 9 Max input bytes 492 bytes max output bytes 492 bytes 10 Provide byte swap function No swap double byte swap four byte swap 11 Working temperature 4 140 20 60 relative humidity 5 95 non condensing 12 External Dimensions W H D 1 57 in 4 92 in 4 33 in 40mm 125mm 110mm 13 Installation 35mm ra...

Страница 6: ... to the power Use DC 24V power supply dual power interface redundant function User can use one power route or two routes to provide supply When using two powers to supply power another power can keep supplying power to ensure the normal operation of equipment if one power fails Power wiring is as follows ...

Страница 7: ...ta Input S7 Bi directional Data S8 Bi directional Data 2 3 DIP Switch The DIP switch is located at the bottom of the gateway bit 1 is mode bit and bit 2 is function bit Off On 1 2 Mode bit 1 Function bit 2 Description Off Off Run mode allow reading and writing configuration data Off On Run mode forbid reading and writing configuration data On Off Configuration mode IP address is 192 168 0 10 fixed...

Страница 8: ...ftware and start the configuration of GT200 MT EI Detailed information please refer to the using method of SST EE CFG software Note The network factory setting of GT200 MT EI is DHCP If no DHCP Server on the network users can pull the bit 1 to ON and restart GT200 MT EI to make the settings take effect Now the IP address of GT200 MT EI is 192 168 0 10 fixed subnet mask is 255 255 255 0 gateway add...

Страница 9: ...nual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 9 3 Hardware Description 3 1 Appearance Ethernet indicators Dual power interface Indicators reserved Ethernet RJ45 interface Configuration switch ...

Страница 10: ...ts 3 seconds Modbus TCP connection is off ENS Orange and SNS Orange Orange Red and green light on at the same time Simultaneously on Start up state Blink alternately Configuration state 3 3 Configuration switch The DIP switch is located at the bottom of the gateway bit 1 is mode bit and bit 2 is function bit Off On 1 2 Mode bit 1 Function bit 2 Description Off Off Run mode allow reading and writin...

Страница 11: ... keep supplying power Pin Function 1 GND 2 NC not connected 3 24V DC 24V 3 4 2 Ethernet Interface Ethernet interface uses RJ 45 connector its pin standard Ethernet signal is defined as below Pin Signal Description S1 TXD Tranceive Data Output S2 TXD Tranceive Data Output S3 RXD Receive Data Input S4 Bi directional Data S5 Bi directional Data S6 RXD Receive Data Input S7 Bi directional Data S8 Bi d...

Страница 12: ...re icon on the desktop after installation to enter the Select device interface Select GT200 MT EI click OK to enter into the main interface of GT200 MT EI enter into the default parameters setting interface of EtherNet IP Click the Ethernet type of equipment view interface to switch the parameters setting interface 4 2 User Interface The main interface of SST EE CFG includes Title bar Menu bar Too...

Страница 13: ...configuration project Open Open a configuration project Save Save current configuration Add Node Add a Modbus TCP slave node Delete Node Delete a Modbus TCP slave node Add Command Add a Modbus command Delete Command Delete a Modbus command Tool Bar Equipment plate Users can choose operation object includes Ethernet type and adding node and command Menu Bar Title Bar Configuration plate Input confi...

Страница 14: ...ith configured commands in the gateway memory data buffer Auto Mapping Used to automatically calculate the mapped memory address without confliction by each command Export Xls Export current configuration to the local hard disk saved as xls file Debug Monitor the gateway memory buffer data 4 3 Equipment View Operation 4 3 1 Equipment View Interface 4 3 2 Equipment View Operation Mode For equipment...

Страница 15: ...a new node named New node under Modbus TCP 2 Delete node Left click on the node to be deleted and then perform the operation of deleting the node The node and all commands will be deleted 3 Add commands Left click on the node and then perform the operation of adding command to add a command for the node It will pop up the command selecting dialog box for users to choose Shown as below Select the c...

Страница 16: ...g node choose the node and execute the operation of copying nodes include all commands under the node 7 Paste node Left click and choose any existing node execute operation of paste node Then at the Ethernet rear part you can see a new node include all commands under the node Node parameters of new node is default setting it needs to be reset 4 4 The Operation of Configuration Interface 4 4 1 Ethe...

Страница 17: ...dbus TCP slave Valid in Modbus TCP master function open close optional Valid in Modbus TCP master function Choose open means to clear the input data of this slave when continuous three times no response of one Modbus TCP slave 4 4 2 Modbus TCP Configuration View Interface In equipment view interface click Modbus TCP when choosing different protocol the configuration view interface and configurable...

Страница 18: ...n polls Receive the right response after one Modbus command has been sent or sending next Modbus command after response timeout the range is 0 2500ms the default is 0 Polling mode of output commands continuous output disable output and change of state output is optional Protocol type select Modbus TCP slave The configurable items include Assign IP Mode IP Address Subnet Mask Gateway Address Check ...

Страница 19: ...s monitor with each other EtherNet IP monitor the network state of Modbus TCP Modbus TCP monitor EtherNet IP network state and no indicating optional High Low byte swap No swap double byte swap four byte swap optional the default is no swap 4 4 3 Node Configuration View Interface In equipment interface click Modbus TCP when selecting Modbus TCP at protocol type right click Modbus TCP and add new n...

Страница 20: ...mapping address and memory mapping bit offset is optional Users can see the communication state between this node and gateway in EtherNet IP input data Memory mapping address Address range that equipment state is mapped in the module memory 0x0000 0x01EB Calculate by clicking Auto mapping Memory mapping bit offset Bit x where equipment state is in memory mapping byte 0 7 4 4 4 Command Configuratio...

Страница 21: ...s item of SST EE CFG indicates protocol address When users input PLC address it will pop up the dialog box below After clicking OK the PLC address users input will be converted into the protocol address Here is the example of PLC address and corresponding protocol address Command PLC address examples Corresponding protocol address Coil Status 00001 00010 00000 00009 Input Status 10001 10010 00000 ...

Страница 22: ...the module memory Read command 0x0000 0x01EB Write command 0x4000 0x41EB Users can also use this area after write command is about local data exchange 0x0000 0x01EB Memory mapping bit offset 0 7 For the bit operation command means the position where the start bit is in the byte range0 7 Byte swap No swap double byte swap and four byte optional 4 4 5 Comment Interface Comment interface displays the...

Страница 23: ...ch command is used to check the position of this command in memory mapping area Click one command and check the box it will show the position where relevant commands occupy in the memory mapping area Click the command again and uncheck the box the command will not be shown in the mapping area This function will be used for confliction detect among commands in memory mapping area ...

Страница 24: ...will be in green without conflict Yellow Write command When address mapping area is located in input area it will be in yellow without conflict Blue When address mapping area is located in output area it will be in blue without conflict Red In input area or output area different command occupied on the same byte this byte area will be in red For bit operation command the above grid displaying mean...

Страница 25: ...guration Users can select whether to use the search function When users use search function it will search all GT200 MT EI equipment when uploading and downloading the configuration When users don t use the search function users must appoint the IP address of equipment which needs to be connected It will only list one equipment when uploading and downloading the configuration ...

Страница 26: ...COM 26 Please click OK to confirm your choice click cancel will lead to starting search function 4 6 2 Upload Configuration Choose upload configuration it will pop up the dialog box of searching equipment Click refresh button will search equipment on the Ethernet again ...

Страница 27: ...uipment you want to configure and click Sign In to enter into the upload dialog box Upload the configuration information from the equipment to the software the interface is shown below 4 6 3 Download Configuration The operation of download configuration is the same as upload configuration ...

Страница 28: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 28 Notes Before downloading please confirm all configurations have been completed and right ...

Страница 29: ...ve and save the configured project as chg file 4 7 2 Load Configuration Project Select Open and open the saved chg file 4 8 Excel File Output Excel configuration Excel file will help users to check the relevant configuration Select the export xls icon export the configuration information to excel and save Select the appropriate path shown as below ...

Страница 30: ...us TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 30 4 9 Monitor I O Data This function is used to monitor the buffer data click Debug button on the toolbar and it will pop up the dialog box of searching equipment ...

Страница 31: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 31 Click Sign In it will pop up the I O data monitor dialog box below ...

Страница 32: ... EI WWW SSTCOMM COM 32 Click Save Content button can save relevant content to the PC hard disk This button becomes Stop saving If you want to finish saving you can press Stop saving button It can pause displaying buffer data by clicking Pause displaying ...

Страница 33: ...P master When the gateway is Modbus TCP master Modbus read command will write the read data to the network input buffer for EtherNet IP accessing Modbus write register command gets data from network output buffer and export to the Modbus TCP slave equipment through write command As is shown above network input buffer range is 0x0000 0x01EB function code 01H 02H 03H 04H as data input function 05H 0...

Страница 34: ...sage The gateway acts as Modbus TCP slave support function 03H 04H 06H and 10H Network input buffer is Modbus TCP master output at the Modbus TCP side It is mapped to the Modbus read holding register Users can use No 3 command to read back It supports 03H 06H and 10H function code Register starting address is 40001 0 Network output buffer is Modbus TCP master input It is mapped to Modbus input reg...

Страница 35: ...f 35001 5000 When EtherNet IP network fails the register is set to 0 and 1 if network is normal c No matter open or close the monitor function it can still get the network status of EtherNet IP by reading the register which address is 35001 5000 d If opened it will map the register which address is 35001 5000 to the register which address is 30001 0 EtherNet IP output data starts to be mapped the ...

Страница 36: ...set in the software SST EE CFG range 5 496 bytes among them the first 4 bytes is real time frame header reserved Output Instance101 data length can be set in the software SST EE CFG range 1 492 bytes Take configuration parameters of RSLogix5000 as an example Notes The Size the bytes number that has been configured in the above picture is consistent with the input output bytes number of Instance wh...

Страница 37: ...following RSLogix 5000 example will describe how to read write I O data using MSG 8 1 Read I O Data Create a new project it is in the Offline mode Add two new tags ReadTag and ReadData under the Controller Tags and set the type of ReadTag as MESSAGE and ReadData as SINT 500 Right click ReadTag select Configure ReadTag ...

Страница 38: ...p window it needs to set some parameters as below Message Type CIP Generic Service Type Select Get Attribute Single now relevant service code will become e Hex Class 4 Hex Instance 102 Attribute 3 Hex Destination Select ReadData label now the data that have been got will be saved in this tag ...

Страница 39: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 39 Select Communication label first click Browse button select the gateway PLC has connected with click OK to confirm ...

Страница 40: ...ect ReadTag as Message Control in the MainRoutine of MainProgram This is a simple command which can sent a read request it still needs to add some logic commands to trigger this command in common program About the detailed information please refer to RSLogix5000 Download the program to the PLC and set PLC into Online state ...

Страница 41: ...fold ReadData you will see that PLC can read the data of Modbus TCP master or Modbus TCP slave through the gateway GT200 MT EI 8 2 Write I O Data Enter the Offline mode add two new tags WriteTag and WriteData under the Controller Tags Define the type of WriteTag as MESSAGE and WriteData as SINT 500 PLC read data command ...

Страница 42: ...WWW SSTCOMM COM 42 Enter the Monitor Tags interface input some data in the WriteData tag There data will be outputted to GT200 MT EI through PLC Described as below picture 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 and 0x90 are the data that will be outputted ...

Страница 43: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 43 Right click WriteTag select Configure WriteTag ...

Страница 44: ...ow it needs to configure as below Message Type CIP Generic Service Type Select Set Attribute Single now relevant Service Code will become 10 Hex Class 4 Hex Instance 101 Attribute 3 Hex Source Element Select WriteData tag it indicates the data in the WriteData tag will become the data PLC outputs ...

Страница 45: ...Length Use byte as unit this value should be less than or equal to the current selecting bytes which Instance represents Configured bytes number in SST EE CFG Select Communication label first click Browse button select the gateway PLC connected in the new window click OK to confirm ...

Страница 46: ...MM COM 46 Shown as below add a MSG command in the MainRoutine of MainProgram and select WriteTag as Message Control Download PLC program to the PLC and set PLC to Online state the data in WriteData will be outputted to Modbus TCP master or slave through GT200 MT EI ...

Страница 47: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 47 PLC write data command PLC read data command ...

Страница 48: ... AB EtherNet master PLC Here are some typical applications of GT200 MT EI 9 1 EtherNet IP master PLCs interconnect with Modbus TCP master PLCs In this case different EtherNet IP masters are connected to the same Modbus TCP master PLC with many GT200 MT EI gateways through Ethernet switch machine in this way many EtherNet IP master PLC can communicate with Modbus TCP master PLC Note GT200 MT EI nee...

Страница 49: ...case GT200 MT EI gateway needs to be configured as EtherNet IP slave and Modbus TCP master EtherNet IP master devices Modbus TCP slave devices and industrial Ethernet gateway GT200 MT EI connect with each other through Ethernet switch machine It can realize the data uploading from Modbus TCP slave to EtherNet IP master through data mapping of GT200 MT EI ...

Страница 50: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 50 10 Installation 10 1 Machine Dimension Size 1 57 in width 4 92 in height 4 33 in depth ...

Страница 51: ...User Manual Modbus TCP EtherNet IP Gateway GT200 MT EI WWW SSTCOMM COM 51 10 2 Installation Method 35mm DIN rail mounting ...

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