Internet PLC Forum

Quote from: FQ-ONG on June 25, 2006, 05:56:32 PM

Dear Support,

How come? Just upload  a program via RS232!!!
Does the (E10-npn+ CPU) frangibility like this?
Then, is it too devilishness, dangerous and afraid during program transfer, isn't it?

Thank you

If the output is connected directly to 24V (not through a load) and you transfer a program that turns on that output, what do you think will happen? Since you are not the user I don't think it is fair for  you to question about the reliability of the E10 without knowing the full facts, and using words such as "devilishness, dangerous and afraid" sure doesn't help. The user seems to content that something he did was giving trouble.

Your own situation is very different (electrical noise damaging Rs485 driver or corrupting EEPROM content) and we would prefer that you do not go after every user on this forum to suggest that they have the same situation as yours.

I have a E10 PLC on my hand and I need to use it later on. I just want to know the full facts, real situation or action that can hurt or injure the PLC. This will improve my knowledge or experience about the protection of PLC, so, I will not repeat the same mistake as other user to hurt or injure the PLC and keep away from PLC trouble.

Thank you

Dear Support,

How come? Just upload  a program via RS232!!!
Does the (E10-npn+ CPU) frangibility like this?
Then, is it too  ,   and   during program transfering, isn't it?

Thank you

Dear Durrani,

Did you connect a networking between PLCs by using RS485? If yes, how many PLCs did you connect? Can you tell me more about the condition when you got the problem?

I also face to the problem that you mentions before. Electrical noise is modifying either the RAM content or the EEPROM content or both and is therefore giving you all kinds of problems you mentioned.

Is that only this 4 error occurs? If yes, may be the the EEPROM chip M2017P not yet fully  damaged and may be we still can rescue it, I hope not too late.
1) If you have using RS485 network, try to remove the 75176 or 75HVD3082 RS485 driver IC. (May be the damaged IC is 75176 or 75HVD3082 RS485 driver IC and not the EEPROM chip M2017P)
2) Please off power for that PLC to rest not less than one day.
3) You can use Dos version TriLogi program to remove the password. (This will clear the program in PLC also, so, you need to re-transfer the program to the PLC.)
4) If you have more than one PLC, then you can exchange the EEPROM chip M2017P and try to detect the condition of both PLC. (Which PLC still have problem?)
5) Try to use another power supply.
6) If you have using RS485 network, temporary remove the RS485 network cable.

Thank you

Can the Electrical noise generate the Host Link Command on the Slave PLC?

Can we obstruct from Electrical noise to modifying either the RAM content or the EEPROM content or both by RS485?

Thank You.

The cursor can be turned on/off, change to block or underscore  using the SETLCD 0,0, CHR$(n) where n is an integer. Please refer to the PLC's installation guide for the correct n value to turn off the cursor if that's what you want to do.

I can't found it on PLC's installation guide?
May I know which page on PLC's installation guide?

Thank you.

Can the READMODBUS command generate the Host Link Command on the Slave PLC by itself?

Thank you.

Do it have any influence on PLC during the PLC execute this custom functions with a lot of empty space or tab?

Thank You

May I know more about TBASIC Statements & Functions. (More explanation then TBASIC Keywords on TriLogi Help)
example:

other than status (1), status (2) and status (, is it still have another status (n) like status (3), status (4) ......?

SETSYSTEM 4,data, SETSYSTEM 5,data, SETSYSTEM 6,data......, what default system?s parameters will be change?

Any more command that does not listed in the TBASIC Keywords Help?

Thank You.