communication between CI853 to CI 840 using(MODBUS) RS485 to RS232 convertor???,
hiii
Is it possible to communicate between CI853 to CI 840 using MODBUS protocol????Between CI853 & CI 840 i am RS485 to RS232 convertor.I am traying this to know about modbus communication...
Answers
Hello,
You mean modbus communication between CEX Module & FCI module?
That's one not supports
Each of them has its ow.n applications please refer below
CI853 supports 2 channel MOdbus RTU(RS232) comm. with 3rd party device & it will sits left part of the controller(CEX bus) so you can directly connect defferent modbus rs232 devices to this by using modbus converters even multidrop also possible.
FCI:CI840 is a Profibus slave device you can use this when you are using Profibus Dp-V1 (CI854 as a master) here you can connect 12modules/cluster or 24 modules/station. This is not for modbus communication.
Greetings,
CI840 is a Fieldbus Communication Interface via Profibus, and CI853 is Modbus RS232 Communication Interface Card. Electrical base seems familiar but software protocols are diffrenet. So according to my knowledge, you are not able to use CI840 with CI853 card.
No
Profibus uses RS485 Hardware but the messages are completely different from modbus. Its like 2 people speaking English and Japanese. You're both talking but you cant understand each other.
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