Hello,

I am trying to moniter 8 temp zones using cc-link temp input module. I wrote the code and got it working yesterday, with the exception of the temperature I am reading is 59-60 degrees C, and it should be more like 20 C or so. The module I am using is an AJ65BT-68TD. If anyone has any ideas as to why the reading isn't accurate, I would love to hear them. Let me know if anyone needs more info from me.

Thanks in advance for any help,

plcdp

Hi,

I think it's impossible to help you with the concrete advice, because more and more questions would appear. May be need to check parameter setup for each intelligent module (in particular, for temperature measurement) in Project - Parameter - Network - CC-Link - Initial Settings - Regist Procedure.

Good luck.

Hi,

I'm pretty new to this and I am not sure what you mean. I am using a fx3u plc with gx dev. I can't find any path like the one you mentioned above. Am I missing something?

plcdp

FX3U does not set parameters for CC-Link that way. He was referring to the Q Series.

Check to ensure you have configured the module for the proper type of thermocouples. Also, you used thermocouple grade wire to from the sensors to the module right? Not using the right wire will add resistance and make readings inaccurate.

Crossbow already has answered to your notice. Thanks to Crossbow
But in future, I'm not recommend to use CC-Link intelligent modules. Better will be to use FX2N-32DP-IF Profibus-DP remote station with the standard expansion modules of FX-series. It's more cheaper, easy and flexible way

Hello,

I thought he was talking about the q series but wasn't sure.

Yes all my thermocouples are type j and I have enabled the "all channel batch type J selection flag" and the wiring is all factory thermocouple wiring. (Meaning there are no extensions or splices etc.) I dont have it near anything that would produce a lot of noise either.

plcdp

Inntele, that module is being phased out early in 2010 for component availability issues. I saw a notice on that.

The CC-Link block is the right way to go, and I have used one on a project back in 2004.

Try to only wire up one input, to see if the channels are affecting each other.

I have searched, but nowhere could find the information about FX2N-32DP-IF production phase-out. Please, write where you have seen it.


I also used CC-Link networks. For the first time in 2001 with the FX, the second time in 2004-2005 with Q. And every time became convinced that the process of network integration of intelligent modules requires unnecessary efforts from programmer and cost of such solutions is more expensive than the Profibus-DP. May be you have another opinion and you could list some advantages of CC-Link solution vs. Profibus-DP.

see hier

Tried that this morning, same result. I have talked with tech support at MEAU and they are telling me I will need to do an error compensation by setting the offset and gain for each channel individually. My problem with that is that the module I am trying to set up is a test station in my office, and we have this exact same setup running on a machine right now. This module I'm using actually came off the running machine. (It was swapped out during troubleshooting at one point, and wasn't the problem.) The spare I put into the machine was new in box and required no tuning of offset and gain when installed, and the setup program logic is the same as I am currently using. So I am hesitant to adjust offset and gain on a module that was already running and didn't require tuning in the first place...

any other ideas?

plcdp