what is the reason for damage the communication of vnet card specially Bus 2
Yokogawa vnet
- Thread starter smart solutions
- Start date
what you mean by "damage" the communication...plz clarify
is that loss of comm or other "damage" like materials damage...
loss of communication.
Although when i replacing by new card work fine
Although when i replacing by new card work fine
Lots of things can cause a comm card failure, nothing specific to Yokogawa or its protocol/network
Electrical
It only takes one transistor of the hundreds of thousands/millions to fail and the logic or memory is bad.
Non-Volatile memory can fail after X thousands of write cycles
It only takes one capacitor to lose its capacitance and noise on the power bus can corrupt a bit or two or many.
It only takes a little bit of corrosion on a connector pin/spring contact/edge component to cause lack of connection.
An ROHS solder whisker can cause a short to another trace/component.
One cold solder joint can flex open/closed/open/closed.
Environmental
Heat kills electrical components. Dirty fan filters cause over heating. Missing sunshields cause overheating. Accumulated dirt prevents cooling action.
Dissolved or suspended dirt and minerals in water will precipitate and leave 'leakage' paths that corrupt logic or the comm signal. (water in junction boxes)
Environmental electrical
Electrical surges on the signal lines can cause driver failures. Close lightning strikes, faulty earth grounds on large equipment.
I'm others can list additional failure causes.
Electrical
It only takes one transistor of the hundreds of thousands/millions to fail and the logic or memory is bad.
Non-Volatile memory can fail after X thousands of write cycles
It only takes one capacitor to lose its capacitance and noise on the power bus can corrupt a bit or two or many.
It only takes a little bit of corrosion on a connector pin/spring contact/edge component to cause lack of connection.
An ROHS solder whisker can cause a short to another trace/component.
One cold solder joint can flex open/closed/open/closed.
Environmental
Heat kills electrical components. Dirty fan filters cause over heating. Missing sunshields cause overheating. Accumulated dirt prevents cooling action.
Dissolved or suspended dirt and minerals in water will precipitate and leave 'leakage' paths that corrupt logic or the comm signal. (water in junction boxes)
Environmental electrical
Electrical surges on the signal lines can cause driver failures. Close lightning strikes, faulty earth grounds on large equipment.
I'm others can list additional failure causes.
