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When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
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--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
How on earth do you expect anyone to help you? You have not provided any files or a netlist to work with. By the way, your message says it is a warning, not an error - there is a difference. A warning normally does not prevent the analysis from running. An error does. Regards, Tony
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--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello Steve, Apologies for the earlier comment. I found your files in Files>Temp>AD8336, but there was no announcement or indication from you that they were there. You schematic wouldn't run, but not due to the reason you gave. You had hard-coded the absolute path of the model file into the symbol, and of course when it is downloaded by someone else, it will, in general, not have the same path that you used. If you put the .included file into the .asc directory, you don't need any absolute path, as LTspice will always look there. The error I got was "timestep too small... etc", which sometimes means the model is dodgy, but the schematic is probably at least syntactically OK. I changed your schematic to something resembling the ADI application circuit, but still got a convergence error with an .op analysis, so I think the model file is the problem, but I'm afraid I don't have the time or inclination to debug it. Sorry. Regards, Tony
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--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello STM, I have corrected your symbol and the schematic. It has been also necessary to add some convergence help. It has required the critical option .options cshunt=1e-15 I have uploaded a working example. Files > Temp > AD8336 > AD8336_1.zip. Best regards, Helmut
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Tony,
Thanks for answering. I thought FILES\AD8336 in my help request would indicate where all the files were. Is there another way I should have done it?
STM
toggle quoted message
Show quoted text
--- In LTspice@..., "Tony Casey" <tony@...> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello Steve,
Apologies for the earlier comment. I found your files in Files>Temp>AD8336, but there was no announcement or indication from you that they were there.
You schematic wouldn't run, but not due to the reason you gave. You had hard-coded the absolute path of the model file into the symbol, and of course when it is downloaded by someone else, it will, in general, not have the same path that you used. If you put the .included file into the .asc directory, you don't need any absolute path, as LTspice will always look there.
The error I got was "timestep too small... etc", which sometimes means the model is dodgy, but the schematic is probably at least syntactically OK.
I changed your schematic to something resembling the ADI application circuit, but still got a convergence error with an .op analysis, so I think the model file is the problem, but I'm afraid I don't have the time or inclination to debug it. Sorry.
Regards,
Tony
|
--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
Tony,
Thanks for answering. I thought FILES\AD8336 in my help request would indicate where all the files were. Is there another way I should have done it?
STM
--- In LTspice@..., "Tony Casey" <tony@> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello Steve,
Apologies for the earlier comment. I found your files in Files>Temp>AD8336, but there was no announcement or indication from you that they were there.
You schematic wouldn't run, but not due to the reason you gave. You had hard-coded the absolute path of the model file into the symbol, and of course when it is downloaded by someone else, it will, in general, not have the same path that you used. If you put the .included file into the .asc directory, you don't need any absolute path, as LTspice will always look there.
The error I got was "timestep too small... etc", which sometimes means the model is dodgy, but the schematic is probably at least syntactically OK.
I changed your schematic to something resembling the ADI application circuit, but still got a convergence error with an .op analysis, so I think the model file is the problem, but I'm afraid I don't have the time or inclination to debug it. Sorry.
Regards,
Tony
Hello STM, It's possible I looked before the files were actually there, but when I found them they were in Files>Temp>AD8336, not Files>AD8336. It's also helpful when uploading files, to check the box about making an announcement to the group with a comment, not least because that message will have the correct hyperlink to the uploaded file because it's autogenerated and not prone to user error. I'm glad Helmut sorted you out, though, as he usually does when others fail. Regards, Tony
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Helmut,
Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the effect. Lots of subtle stuff like the series resistance in the supplies messing things up that I don't get.
I am curious about your reference to correcting the symbol because I am still using mine and it works OK. I had LTspice make it from the netlist editor. I tried to open yours to see what you changed but it is not editable. What did you change?
Thanks again,
STM
toggle quoted message
Show quoted text
--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello STM,
I have corrected your symbol and the schematic. It has been
also necessary to add some convergence help.
It has required the critical option
.options cshunt=1e-15
I have uploaded a working example.
Files > Temp > AD8336 > AD8336_1.zip.
Best regards,
Helmut
|
--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
Helmut,
Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the effect. Lots of subtle stuff like the series resistance in the supplies messing things up that I don't get.
I am curious about your reference to correcting the symbol because I am still using mine and it works OK. I had LTspice make it from the netlist editor. I tried to open yours to see what you changed but it is not editable. What did you change?
Thanks again,
STM
Hello STM, I made a specific symbol which isn't editable. All symbol of the LTC-opamps are made this way. Please open the symbol(.asy) with LTspice to see which attributes I have set. Best regards, Helmut
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I opened the AD8336.asy you had in the zip file with FILE OPEN in LTspice but I don't find any attributes.
When I open it in notepad the only attributes are pin references.
Version 4
SymbolType BLOCK
RECTANGLE Normal -80 -104 80 104
WINDOW 0 0 -104 Bottom 2
WINDOW 3 0 104 Top 2
SYMATTR Value AD8336
SYMATTR Prefix X
SYMATTR SpiceModel ad8336.cir
SYMATTR Value2 AD8336
PIN -80 -64 LEFT 8
PINATTR PinName GNEG
PINATTR SpiceOrder 1
PIN -80 -32 LEFT 8
etc.
How do I open the others to see what you set?
Thanks,
STM
toggle quoted message
Show quoted text
--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
Helmut,
Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the effect. Lots of subtle stuff like the series resistance in the supplies messing things up that I don't get.
I am curious about your reference to correcting the symbol because I am still using mine and it works OK. I had LTspice make it from the netlist editor. I tried to open yours to see what you changed but it is not editable. What did you change?
Thanks again,
STM
Hello STM,
I made a specific symbol which isn't editable.
All symbol of the LTC-opamps are made this way.
Please open the symbol(.asy) with LTspice to see which
attributes I have set.
Best regards,
Helmut
|
Tony,
You are right about the path - I messed up, sorry.
I will follow the check box suggestion from now on.
Thanks again,
STM
toggle quoted message
Show quoted text
--- In LTspice@..., "Tony Casey" <tony@...> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
Tony,
Thanks for answering. I thought FILES\AD8336 in my help request would indicate where all the files were. Is there another way I should have done it?
STM
--- In LTspice@..., "Tony Casey" <tony@> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
When I try to run AD8336-2.asc in FILES\AD8336 I get an error message that contains "Circuit: * C:\Program Files\LTC\AD models\AD8336\AD8336-2.asc
WARNING: Node U1:U4_N24227 is floating."
But checking the .net file I do not find any NC.
Whats wrong?
Thanks in advance,
STM
Hello Steve,
Apologies for the earlier comment. I found your files in Files>Temp>AD8336, but there was no announcement or indication from you that they were there.
You schematic wouldn't run, but not due to the reason you gave. You had hard-coded the absolute path of the model file into the symbol, and of course when it is downloaded by someone else, it will, in general, not have the same path that you used. If you put the .included file into the .asc directory, you don't need any absolute path, as LTspice will always look there.
The error I got was "timestep too small... etc", which sometimes means the model is dodgy, but the schematic is probably at least syntactically OK.
I changed your schematic to something resembling the ADI application circuit, but still got a convergence error with an .op analysis, so I think the model file is the problem, but I'm afraid I don't have the time or inclination to debug it. Sorry.
Regards,
Tony
Hello STM,
It's possible I looked before the files were actually there, but when I found them they were in Files>Temp>AD8336, not Files>AD8336.
It's also helpful when uploading files, to check the box about making an announcement to the group with a comment, not least because that message will have the correct hyperlink to the uploaded file because it's autogenerated and not prone to user error.
I'm glad Helmut sorted you out, though, as he usually does when others fail.
Regards,
Tony
|
--- In LTspice@..., "stm6823@..." <stevemorris@...> wrote:
I opened the AD8336.asy you had in the zip file with FILE OPEN in LTspice but I don't find any attributes.
When I open it in notepad the only attributes are pin references.
Version 4
SymbolType BLOCK
RECTANGLE Normal -80 -104 80 104
WINDOW 0 0 -104 Bottom 2
WINDOW 3 0 104 Top 2
SYMATTR Value AD8336
SYMATTR Prefix X
SYMATTR SpiceModel ad8336.cir
SYMATTR Value2 AD8336
PIN -80 -64 LEFT 8
PINATTR PinName GNEG
PINATTR SpiceOrder 1
PIN -80 -32 LEFT 8
etc.
How do I open the others to see what you set?
Thanks,
STM
Hello STM, You can see my attributes in the text file above. It's different from what you had in your your symbol. Normally you don't look with a text editor. You should open my symbol with LTspice and then "Edit->Edit Attributes...". Modelfile: ad8336.cir Value: AD8336 Value2: AD8336 Best regards, Helmut
--- In LTspice@..., "Helmut" <helmutsennewald@> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
Helmut,
Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the effect. Lots of subtle stuff like the series resistance in the supplies messing things up that I don't get.
I am curious about your reference to correcting the symbol because I am still using mine and it works OK. I had LTspice make it from the netlist editor. I tried to open yours to see what you changed but it is not editable. What did you change?
Thanks again,
STM
Hello STM,
I made a specific symbol which isn't editable.
All symbol of the LTC-opamps are made this way.
Please open the symbol(.asy) with LTspice to see which
attributes I have set.
Best regards,
Helmut
|
Ah. Got it. It was "Edit->Edit Attributes..." I was missing.
Thanks again.
toggle quoted message
Show quoted text
--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
I opened the AD8336.asy you had in the zip file with FILE OPEN in LTspice but I don't find any attributes.
When I open it in notepad the only attributes are pin references.
Version 4
SymbolType BLOCK
RECTANGLE Normal -80 -104 80 104
WINDOW 0 0 -104 Bottom 2
WINDOW 3 0 104 Top 2
SYMATTR Value AD8336
SYMATTR Prefix X
SYMATTR SpiceModel ad8336.cir
SYMATTR Value2 AD8336
PIN -80 -64 LEFT 8
PINATTR PinName GNEG
PINATTR SpiceOrder 1
PIN -80 -32 LEFT 8
etc.
How do I open the others to see what you set?
Thanks,
STM
Hello STM,
You can see my attributes in the text file above.
It's different from what you had in your your symbol.
Normally you don't look with a text editor. You should open
my symbol with LTspice and then "Edit->Edit Attributes...".
Modelfile: ad8336.cir
Value: AD8336
Value2: AD8336
Best regards,
Helmut
--- In LTspice@..., "Helmut" <helmutsennewald@> wrote:
--- In LTspice@..., "stm6823@" <stevemorris@> wrote:
Helmut,
Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the effect. Lots of subtle stuff like the series resistance in the supplies messing things up that I don't get.
I am curious about your reference to correcting the symbol because I am still using mine and it works OK. I had LTspice make it from the netlist editor. I tried to open yours to see what you changed but it is not editable. What did you change?
Thanks again,
STM
Hello STM,
I made a specific symbol which isn't editable.
All symbol of the LTC-opamps are made this way.
Please open the symbol(.asy) with LTspice to see which
attributes I have set.
Best regards,
Helmut
|
