发表于：2010/1/10 22:43:37
#0楼
in current process control industry, more and more smart instruments are been used. and most intelligent instruments support the modbus protocol, this standard is not the international standards. but modbus has become the de facto industry standard, will be supported and replicated by more and more instrument manufacturers.
siemens plc via the cp341 card to achieve the plc and smart instrument modbus communications, but its biggest drawback is that it should through the hardware dongle to achieve the modbus communication. and this dongle is so expensive, and each cp341 in your project need to configure the dongle.
now we have a new method of pure software, and no longer rely on the hardware dongle features. it can direct implementation of modbus communication functions, and it has the redundant communication function, which is missed in siemens’ function lib. most important feature of this driver is that a set of software can be unlimited use. once investment, life-long benefit, greatly enhance the competitiveness of you!
provides the following version of the program, interested please email contact:
dixinke@163.com
a test version for free distribution.
modbus master without dongle driver characteristics (pcs7 version)
1, no need of siemens’ hardware dongle
2, support redundant modbus communications capabilities (there is no such function in siemens’ all existing drivers currently)
3, supports the following modbus commands: fc01, fc02, fc03, fc04, fc05, fc06, fc15, fc16
4, support for each command to set up independent watchdog timeout
5, support for each individual failure feedback order to facilitate the diagnosis
6, support the main circulation time interval set
7, presided over an infinite command expansion
8, simple configuration, flexible and easy to use
ascmodmas for pcs7 manual_e.pdf
modbus master without dongle driver characteristics (step7 version)
1, no need of siemens’ hardware dongle
2, support redundant modbus communications capabilities (there is no such function in siemens’ all existing drivers currently)
3, supports the following modbus commands: fc01, fc02, fc03, fc04, fc05, fc06, fc15, fc16
4, support for each command to set up independent watchdog timeout
5, support for each individual failure feedback order to facilitate the diagnosis
6, support the main circulation time interval set
7, presided over an infinite command expansion
8, configuration is complicated than pcs7 version, but there is a vb program to help configure the commands (it is free), flexible and easy to use
ascmodmas for step7 manual_e.pdf
modbus slave no dongle driver characteristics (universal version)
1, no need of siemens’ hardware dongle
2, supports the following modbus commands: fc01, fc02, fc03, fc04, fc05, fc06, fc15, fc16
3, simple configuration simple, flexible and easy to use
ascmodslv manual_e.pdf
any question, please contact me with email for free:
dixinke@163.com
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原文地址： Http://blog.gkong.com/more.asp?id=108680&Name=dixinke
