HYW6688

Problems backing up Mitsubishi FX1N-24MR-ES/UL

7 posts in this topic

Hi guys,

I've encountered a weird problem backing up my old FX1N-24MR-ES/UL PLCs. Hope I can get some helps here. I'm grateful for all the help.

I got some old FX1N-24MR-ES/UL PLCs working on machines, and most of them are working 24/7 for more than 8 years now.

There's a computer in machines communicating with PLC via SC-09 harness( RS232 - RS422 ).

Since Mitsubishi isn't selling and manufacturing FX1N-24MR-ES/UL anymore, I tried to find some compatible alternatives.

I bought a Shihlin Electric AX1N-24MR-ES(It got licensed from Mitsubishi to approve it's 100% compatible with FX1N-24MR-ES/UL) and a copied FX1N-24MR-ES/UL from China.

I downloaded and verified programs/parameters into both PLCs via GX Works2(both PLCs shown as Mitsubishi FX1N-24MR in GX Works2), but they both work about 5~10% differently from the original ones on the machines. But it seems the both new PLCs are working identically.

I've tried download the original program/parameters to a old original FX1N-24MR-ES/UL and it works well, so it seems the program/parameters I read out is correct.

I've also checked the both VRs(D8030, D8031) aren't used in the program.

May you please let me know what else I can do or test to make the new PLCs I working 100% identically as the old ones?

I'm grateful for all your kindly help guys.

Thank you and have a nice day:-)

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What is different?

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17 minutes ago, Ron_S said:

What is different?

Hi Ron_S, thank you for the quick reply : )

Our machine has a motor that lift up a metal cover and another motor controls a spinning wheel.

The normal operation is to stop the spinning wheel first and then lift up the metal cover for about 3 seconds.

But with those two new PLCs, the spinning wheel stopped earlier and the metal cover is barely lifted up for less than a second.

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Hi HYW6688,

It seems that the timebase of your used timers is different. 10ms timer is 100ms timer or something. You should check if there is a difference in the range of the timers in the new PLC compared to the old FX1 model in the manual. I've attached a list of the timebase inside the FX1 type. I hope you have a manual of the new model to compare.

Best regards,

Theo V.

Timer overview FX PLC.pdf

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Posted (edited)

17 hours ago, Theo V said:

Hi HYW6688,

It seems that the timebase of your used timers is different. 10ms timer is 100ms timer or something. You should check if there is a difference in the range of the timers in the new PLC compared to the old FX1 model in the manual. I've attached a list of the timebase inside the FX1 type. I hope you have a manual of the new model to compare.

Best regards,

Theo V.

Timer overview FX PLC.pdf

Thank you for the kindly help Theo V : )

I'll looking into the timer parts of the new PLCs we bought.

By the way, we're also considering upgrading to a Mitsubishi FX3G-24MR

Can the program of FX1N just download to a FX3G directly?

I'm grateful for your experience sharing mate : )

Edited by HYW6688

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I'm not at my plc computer at the moment but select change plc type.

Chose the new plc type and it will warn you if there are any differences

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Hi HYW6688,

It should be upwards compatible to run the FX1N in a FX3G model bij changing the PLC type in the GX-developer software.

Just try it and see whats happening. 

Best regards,

Theo V.

(by the way, did you by chance allready checked the timers? and was it the problem as I mentioned?)

 

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