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Summary of Contents for ICP DAS USA GW-7838-M
- Page 1 User Manual Version 1.0.1 Oct 2021 GW-7838-M (Modbus TCP Server to M-Bus Master Gateway)
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Page 2: Table Of Contents
4.8 Description ........................33 4.9 Register ......................... 34 Appendix A. Firmware Update ....................35 Appendix B. Revision History ....................36 GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：2 Copyright © 2020 ICP DAS Co., Ltd. All Rights Reserved... - Page 3 Contact us If you encounter any problems while operating this device, feel free to contact us via mail at: service@icpdas.com . We will reply as soon as possible. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：3 Copyright ©...
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Page 4: Introduction
The M-Bus ("Meter-Bus") is a standard for remote reading of meters. It is usable for most types of consumption meters as well as for various sensors and actuators. The GW-7838-M is specially designed for M-Bus slave device. It offers Modbus TCP communication by Ethernet and Modbus RTU communication by RS-232. -
Page 5: Features
Update firmware from serial port Provides PWR, MTX and MRX 3 LED indicators Watchdog inside GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：5 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... -
Page 6: Specification
-25 to +60°C Storage Temperature -40 to +80°C Relative Humidity 10 to 90% RH, Non-condensing GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：6 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com... -
Page 7: Getting Started
2. Getting Started Appearance and pin assignments GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：7 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com... -
Page 8: Led Indicator
2.1 LED Indicator The GW-7838-M module provides three LED indicators, including indicators for power status and module status. The Following is an overview of the purpose and function of each LED indicator together with a description. LED Name LED Description... -
Page 9: Dip Switch
2.2 DIP Switch The GW-7838-M module provides 6-bit dip switches and the first two bits are used to change operation mode. The following is an overview of the purpose and function of each dip switch position together with a description. After changing the configuration of the DIP switch, the GW-7838-M needs to reboot to enable the new setting. -
Page 10: Configuration And Communicate Test
The figure below is an illustration of module wiring. Connect the PC COM port to the RS-232 port and connect M-Bus meter to M-Bus port of the GW-7838-M. Set the DIP switch to the configuration mode and then power it on. -
Page 11: Connect
Click “Configure” tab page, choose the corresponding COM port in PC, or select Ethernet and input GW-7838-M IP Address then click “Connect” button to connect with module. Please be noted that the UART baud rate of GW-7838-M will be 115200bps when it is in configuration Mode. -
Page 12: Baud Rate And Data Format Settings
The first page of the utility lists baud rate and data format configuration of the serial port and the M-Bus port and it also shows the Modbus node ID and IP related parameters of the GW-7838-M. User could add a new baud rate and data format setting or change IP address as need in this page. -
Page 13: M-Bus Meter Settings
In the “Meter” page of the utility, user could configure the M-Bus communication setting by using “Import” or “Add” functions. The usages of these functions are listed as following sections. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：13... -
Page 14: Import
3.3.1 Import There are two ways to add M-Bus Meter setting into GW-7838-M. One is using “Import” to import an existed configuration file and save to GW-7838-M. The configure steps are as following: Step1: Press “Import” button. Step2: Open an existed configuration file of XML format. - Page 15 Step4: Press “Save” button and confirm to save configuration. Step5: After saving success diagram showed, set the DIP switch to operation mode and reboot the module. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：15 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved...
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Page 16: Export
User could export the existed module configuration to a XML file by the “Export” function. Step1: Press “Export” button. Then select path and input file name to export the configuration. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：16... -
Page 17: Add
3.3.3 Add The second way to add meter configuration to GW-7838-M is using “Add” function. The “Add” function can add meter of EN-13757 protocol or CJ/T-188 protocol into GW-7838-M. Refer below operation example for detail setting step. Step1: Press “Add” button and select the protocol of the meter. There are two protocols, EN-13757 and CJ/T188 for select. - Page 18 Step2: The meter information shows as below. Step3: After add all meters on the utility list, press “Save” to save these parameters to the GW-7838-M. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：18 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved...
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Page 19: Save
After adding meters setting or importing configuration, use “Save” function to save configuration into the GW-7838-M. Step1: Press “Save” button. Step2: Confirm to save the configuration. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：19 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... - Page 20 Step3: After saving success diagram showed, set the DIP switch to operation mode and reboot the module. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：20 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved...
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Page 21: Delete
The “Delete” function will delete one meter setting each time. Take the following setting as an example. Step1: Press “Delete” button. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：21 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... - Page 22 Step3: Confirm to delete meter which is selected. Step4: it will show the meter information after deleting as below. Step5: After delete meter configuration completely, press “Save” to save change to GW-7838-M. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01...
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Page 23: Delete All
Step1: Press “Delete All” button. Step2: Confirm to delete all meters’ configuration. Step3: Finally press “Save” to save changing configuration. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：23 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... -
Page 24: M-Bus Meter Communicate Test
After executing the “Gateway Reader”, select the Ethernet and timeout related options, and press the “Start Reader” button to import the configuration file exported in Section 3.3.2. It can test whether the value read matches the setting. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：24 Copyright ©... -
Page 25: Meter Configuration Label Description
After adding meters’ configuration, the meters’ information will be showed as below. There are some labels to record the meters’ information for user’s reference. User can find the meaning of the labels in the following section. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：25 Copyright ©... -
Page 26: Serial
“Serial” field. EN-13757 CJ/T-188 GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：26 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... -
Page 27: Protocol
4.2 Protocol The “Protocol” field is used to indicate which specification of the meter following. GW-7838-M supports two protocols EN-13757 and CJ/T-188. EN-13757 CJ/T-188 GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：27 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... -
Page 28: Subcode
It means that once the subcode is set, it will be permanently saved. About the default subcode, user should contact the meter manufacturer for it. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：28 Copyright ©... -
Page 29: Medium
4.4 Medium The “Medium” field records medium of meters. It will show the medium of meters according to the definition in EN-13757 protocol or CJ/T-188 protocol. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：29 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved... -
Page 30: Value
The “Value” field records value type of meters’ data. It will show the value type of meters’ data according to the definition in EN-13757 protocol or CJ/T-188 protocol. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：30... -
Page 31: Unit
4.6 Unit The “Unit” field records unit of meters’ data. It will show the unit of meters’ data according to the definition in EN-13757 protocol or CJ/T-188 protocol. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：31 Copyright ©... -
Page 32: Cycle
The “Cycle” field records the minimum cycle time (unit is sec.) for polling all meters’ data. Please be noted that the cycle time parameter is for all meters of the M-Bus network. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：32... -
Page 33: Description
The “ Description” field records meaning of meters’ data. It will show the real meaning of meters’ data according to the definition in EN-13757 protocol or CJ/T-188 protocol. GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：33... -
Page 34: Register
(Register) and 2 data is also 8 digit BCD type (Value) from Modbus address 0x0002 ~ 0x0003 (Register). The GW-7838-M will update the meter data as fast as per 60 second one time (Cycle). Note: If GW-7838-M updates all meters data faster than setting cycle time 60 second, the all meters data will be update every 60 second. -
Page 35: Appendix A. Firmware Update
Appendix A. Firmware Update The firmware on the GW-7838-M module can be updated via COM Port. The latest firmware file (*.fw file) and the latest version of the firmware update utility (FW_Update_Tool.zip) are available from the web link below. A notification will not be sent when a new version is released. -
Page 36: Appendix B. Revision History
The table below shows the revision history. Revision Date Description 1.0.0 October 2021 First Release GW-7838-M (Modbus TCP Server to M-Bus Master Gateway) User Manual Version 1.01 Page：36 Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
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