Hello Every one,
can somebody help me. I extended the communication interface of my FX3U with an FX3u-232-BD communication module. I could connect to the PLC using MELSEC IEC GX DEVOLOPER .
I did change the communication settings by altering some bits in the following Register 8420 enabling external communication through channel 2 as specified by the communication manual.
My problem as thus.
After saving the changes, the FX3u-232.BD is block and i can no longer communicatte with the PLC through FX3U-232-BD.. The GOT terminal is connected to it using 422 interface.
Can somebody advice on what to do in order to reset the port values back to the values before my settings now that i can't access it again.
Of course there is another RS323 port on the GOT but need a specail cable to be able to access the PLC from there.
I will be grateful for any tips.
David
Full Version: FX3u-232-BD
Your BD card is channel1, and should not be affected by any devices in the 8420 range.....
If you have modified anything in D8120 or in D8400 area you will have to reset those registers (set them to 0) to be able to communicate again. All in all, you will have to connect to the PLC to be able to set/reset any of the registers (or maybe you can access the correct variables from the GOT terminal and set them from there).
If you have modified anything in D8120 or in D8400 area you will have to reset those registers (set them to 0) to be able to communicate again. All in all, you will have to connect to the PLC to be able to set/reset any of the registers (or maybe you can access the correct variables from the GOT terminal and set them from there).
I did modify D8120 . There is no means to edit the special registers from the GOT. The is an RS232 interface on the GOT but i can't access the PLC through it. I tried to connect to it but it response with the error message wrong cable or in correct parameter settings.
I will have to procure Rs422 communication cable and reset the values using a sequence program i guess. I have thought i can do it without buying the cable.
any new idea will be of help.
Thankls very much for your rapid response
David Awankem
I will have to procure Rs422 communication cable and reset the values using a sequence program i guess. I have thought i can do it without buying the cable.
any new idea will be of help.
Thankls very much for your rapid response
David Awankem
QUOTE (kaare_t @ Aug 31 2009, 09:47 AM) 
Your BD card is channel1, and should not be affected by any devices in the 8420 range.....
If you have modified anything in D8120 or in D8400 area you will have to reset those registers (set them to 0) to be able to communicate again. All in all, you will have to connect to the PLC to be able to set/reset any of the registers (or maybe you can access the correct variables from the GOT terminal and set them from there).
If you have modified anything in D8120 or in D8400 area you will have to reset those registers (set them to 0) to be able to communicate again. All in all, you will have to connect to the PLC to be able to set/reset any of the registers (or maybe you can access the correct variables from the GOT terminal and set them from there).
I think you will have to buy a programming cable (SC-09), and access the PLC directly to reset the values in D8120 unless you can modify the value from the GOT.....
When you get access to the PLC (by programming cable or GOT), you just have to reset (move 0) into D8120 and it will function as a programming port again. Remember to power OFF->ON the PLC after changing D8120 values since the BD card require a reboot to initialize any new parameters.
When you get access to the PLC (by programming cable or GOT), you just have to reset (move 0) into D8120 and it will function as a programming port again. Remember to power OFF->ON the PLC after changing D8120 values since the BD card require a reboot to initialize any new parameters.
Thanks so much kaare, that is absolutely what i'm going to do.
have a good day
david
have a good day
david
QUOTE (kaare_t @ Aug 31 2009, 10:23 AM)
I think you will have to buy a programming cable (SC-09), and access the PLC directly to reset the values in D8120 unless you can modify the value from the GOT.....
When you get access to the PLC (by programming cable or GOT), you just have to reset (move 0) into D8120 and it will function as a programming port again. Remember to power OFF->ON the PLC after changing D8120 values since the BD card require a reboot to initialize any new parameters.
When you get access to the PLC (by programming cable or GOT), you just have to reset (move 0) into D8120 and it will function as a programming port again. Remember to power OFF->ON the PLC after changing D8120 values since the BD card require a reboot to initialize any new parameters.
No problem.
One thing you could do (to avoid future problems) is to just initialize D8120 at PLC boot.... Then, if you ever should "mess up" (
) the configuration again, you can just power-OFF, then power-ON the PLC, and D8120 will be resetted again.... Or you could add an object in GOT to reset D8120 so that you can access this device from the GOT.
Use one of the following:
Click to view attachment
Remember to power-OFF, power-ON the PLC after changing anything in D8120 (the BD card needs to be re-initialized after changing D8120).
One thing you could do (to avoid future problems) is to just initialize D8120 at PLC boot.... Then, if you ever should "mess up" (
) the configuration again, you can just power-OFF, then power-ON the PLC, and D8120 will be resetted again.... Or you could add an object in GOT to reset D8120 so that you can access this device from the GOT.Use one of the following:
Click to view attachment
Remember to power-OFF, power-ON the PLC after changing anything in D8120 (the BD card needs to be re-initialized after changing D8120).
You can also make the COM settings in the PLC Parameters, it does not need to be done in the program.
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