Bộ điều khiển nhúng Modbus/TCP 1 cổng RS-232/485 kết nối Ethernet ICP DAS I-7188EXD-MTCP CR
The I-7188EXD-MTCP is a family of Programmable Device Servers, also known as “Serial-to-Ethernet gateway”, that are designed for linking RS-232/485 devices to an Ethernet network. The I-7188EXD-MTCP also works as a Modbus TCP to RTU gateway that supports most SCADA/HMI communications based on the Modbus TCP protocol.
ICP DAS provides easy-to-use software development tool kits (XServer, Modbus libraries). Users can use them to easily integrate serial devices to have Ethernet/Internet communication ability and through the standard Modbus protocol to communicate with SCADA software (Indusoft, ISaGARF, DasyLab, Trace Mode, Citect, iFix, etc.).
For hardware expansion, the I-7188EXD-MTCP also supports an I/O expansion bus. A cost-effective I/O expansion board with A/D, D/A, D/I, D/O and serial ports is available. Nearly all kinds of I/O functions can be implemented by this bus. But the bus can support only one board. There are more than 50 boards available for I-7188EXD-MTCP, you can choose one of them to expand hardware features.
Features of default Modbus firmware
When you buy an I-7188E -MTCP controller, it already has the default Modbus firmware installed in Flash memory.
The default firmware has the follows features:
- Converters single Modbus/TCP to multi Modbus/RTU
The I-7188E -MTCP is a Modbus/TCP gateway. It can easily upgrade many Modbus/RTU devices to have Ethernet communication ability.
- Supports VxComm technique for every COM port of controllers
If serial devices don’t support Modbus/RTU, you can still access these devices. But need to install VxComm driver on host PCs and assign a COM port number to link to the remote COM port (of I-7188E -MTCP). After that, serial clients can access these remote serial devices via standard RS-232 functions.
- Allowed multi-client (or master) access simultaneously
Different I-7188E -MTCP controller supports different client numbers connect to. Please refer to our FAQ on web for more detail.
http://www.icpdas.com/faq/7188e/hardware/003.htm
- Firmware modifiable
We provide the Modbus SDK allowing users to develop their custom Modbus firmware.
Modbus SDK (in C language)
If the default firmware doesn’t totally suit your requirement. You can use Modbus SDK to modify the default firmware to add extra functions. The Modbus SDK has below features:
- Supports extra user-defined command protocol (TCP/IP)
Modbus/TCP protocol supports 2 basic data format (bit and 2-byte integer). It means if clients (or called masters) don’t support Modbus/TCP or you need other format data (for example: string of floating value), I-7188Es (with default firmware) cannot communicate with them. Using this feature, you can develop your special command protocol to transfer any format of data.
- Register based programming method (easy to use)
Modbus library supports 4 internal register tables (iMemory_AI, iMemory_AO, iMemory_DI, iMemory_DO), you can use these to store specific information. When Modbus/TCP clients request to I-7188E, Modbus kernel will response information from these 4 tables.
- Provides user-defined registers
The 4 internal register tables are all open to users. You need to assign these tables by yourself.
- Can Iink to Modbus/TCP slave devices
By using function ModbusTCP_Master2Slave(declared in MBTCP_7E.h),the 7188EX-MTCP can link 8 max . Modbus/TCP device.
- Can link to Modbus/RTU slave devices
By using function ModbusMaster2Slave (declared in MBTCP_7E.h), Modbus/RTU devices can be easily integrated to internal registers of I-7188Es. An I-7188E polling every Modbus/RTU devices and put every necessary information to internal registers. Clients only ask the I-7188E to get all information of Modbus/RTU devices. That reduces loading of Clients.
- Can link to non-Modbus/RTU serial devices
Some serial devices don’t support Modbus/RTU. We provide functions to let I-7188E -MTCP access serial devices. You can put information to internal registers of it. Thus, the non-Modbus serial devices can also support Modbus/TCP.
- Supports X boards
You can choose one suitable Xboard to add on an I-7188EX to be on board I/Os.
- Xserver SDK compatible
Modbus SDK is based on Xserver SDK. To lear more programming skills, you can refer demos of Xserver. To get information of demos of Xserver, please refer to CD:\Napdso\7188e\TCP\Xserver\Xserver.htm
Modbus Utility
We provide Modbus tools for Windows 98/SE/NT/2K/XP, it includes:
- Modbus Utility
- On-line configuration via Ethernet
- On-line help
- Automatically generate register mapping tables
- Configuration export/imp
- MBRTU
Modbus/RTU client (with source code in VB6) to diagnostic Modbus/RTU slave devices.
- MBTCP
Modbus/TCP client (with source code in VB6) to diagnostic Modbus/TCP slave devices.
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