Data Acquisition Design: PLC, I/O, PC | Manuals & Alternatives

  • Thread starter Thread starter nople
  • Start date Start date
  • Tags Tags
    Data
Click For Summary

Discussion Overview

The discussion focuses on designing a data acquisition system involving a PLC, various I/O interfaces, and a PC for monitoring purposes. Participants explore issues related to obsolete software, communication protocols, and potential alternatives for data communication.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant describes a setup involving a PLC using RS 232, I/O interfaces using RS 485 with Modbus, and a PC for monitoring, highlighting the issue of corrupted and obsolete software.
  • Another participant suggests contacting the manufacturer for proprietary software, questioning the make and model of the PLC.
  • The PLC model is identified as Micrex from Fuji Electric, with previous software developed by a now-defunct company, CHINO, complicating the search for alternatives.
  • Concerns are raised about different data communication cables and signal types, with one participant noting that the PLC uses a square wave signal while the interface uses an AC wave signal, suggesting potential protocol differences.
  • Some participants propose replacing the obsolete PLC with a modern unit, while others argue against this due to cost considerations and the belief that the existing PLC is still functional.
  • There is a request for information on alternative software that can facilitate communication between the PLC and the I/O interfaces.

Areas of Agreement / Disagreement

Participants express differing opinions on whether to replace the PLC or find alternative software solutions. There is no consensus on the best approach to resolve the communication issues.

Contextual Notes

Participants mention unresolved aspects regarding the compatibility of different communication protocols and the specifics of the signal types used in the system.

nople
Messages
5
Reaction score
0
Hi,
I want to design a new data acquisition for my system. Here the detail :

1) PLC using RS 232
2) Interface I/O RS 485(USING MOD BUS), 7 types of interface module but using same communication cable
3) PC ( as a monitoring data) with RS232 card and RS 485

the main problem is the old software have been corrupted and obsolete. so if anyone can advice to use other altenative software that can communicate with this item.Just want to know where to that software and the manual for this software.thank you.
 
Engineering news on Phys.org
any guide what should i do?I have scanned all the interface ip but that take a long time to completed the ip scan..=(
 
Your PLC is probably going to a have proprietary software along with a proprietary compiler. Unless you want to do some reverse engineering, I suggest you contact the manufacturer and see if you can re-order or download their software. Whats the make and model?
 
The model of PLC is Micrex manufacturer of Fuji Electric.
Actually the software was design by another company called CHINO from Japan also but this company not existing anymore.That is the problem, I already ask supplier to provides this kind of software but they cannot supply it.

The other way is, to find another software that be able to receive and send Data from/to PLC and Interface. In addition, when i do a study on data cable of PLC and Interface and find out there are using different data communication cable.

Both using Coxial Cable but the signal was different.(I'm not expert on Communication,correct me if wrong)
PLC signal is square wave +/- 2V and Interface signal is ac wave(more than 2 signal and using different feq) around 0~2v and 0~-4v.

I assume it using different protocol.anyone could explain what kind of signal it is for this Interface?
 
Sounds like you need to replace the obsolete PLC with a more modern unit.
 
berkeman said:
Sounds like you need to replace the obsolete PLC with a more modern unit.

No kidding. Given the description, the thing sounds older than I am. Its going to be less time and trouble to just buy a new unit or make one from scratch.
 
thanks for reply berkeman, to replace all the control system is not cheap. In addition, the PLC still can be use but there no communication data with PLC and CHINO interface (input output).Seem all the input output interface was using MODE BUS communication (where it use RS 485) but the PLC was using P-LINK as a communication data(where the signal was square wave).

The software that been use was design to send and receive data (data acquisition)from both device (PLC & Interface). When i ask the supplier(FUJI ELECTRIC at JAPAN) if any alternative software to replace the damage software(because the software was obselete),there suggest to change it to new system(replace the CHINO interface) and I don't agree with that (It too exspensive)...b'coz the PLC still in good condition and I don't believe there no other software fit to this kind of data communication.So that why I try to find the answer here if anyone know where I can find that kind of software & drivers.

here the schematic diagram for your understanding: http://www.geocities.com/miseryself_4ever/DATA.jpg
 
any idea?
 

Similar threads

Getting an old PLC onto Allen Bradley DH+
  • · Replies 1 ·
Replies
1
Views
5K
Open Source Humanitarian Demining Project
  • · Replies 13 ·
Replies
13
Views
4K
How Can I Improve the Reliability of My Low-Cost Digital Radio Interface?
  • · Replies 5 ·
Replies
5
Views
5K
Programming a PIC 16F886 on a FR28 I/O board
  • · Replies 2 ·
Replies
2
Views
5K
Requesting suggestions for languages, libraries, and architectures for parallel (and sometimes non parallel) numerical and scientific computations
  • · Replies 8 ·
Replies
8
Views
4K