hi
I have a device that has a communication port but I do not know which type of protocol.
I've measured the voltages on pins , that The following values were obtained :


in your opinion , this is which protocol ??
in The manufacturer's catalog Been picture following :


Also come in the catalog the following descriptions :



i Already use rs485 to rs232 and ttl to rs232 converter but can not connect to device of my laptop !
in your opinion ,Except ground pin , How do I know What are other pins ؟؟

 

According to this PDF http://www05.abb.com/global/scot/sc...18c781c125782600314ec0/$file/ds_amas-en_h.pdf
The format is RS232 but when using the instrument adaptor it appears that it may be the same protocal format as RS232 but has been opto isolated?
Is there not way you can use the direct RS232 outlet?
Max.

 

Do you think that this is RS232 protocol ??
Except should not be voltages between -3 to -15 and 3 to 15 volt in this protocol ? while Here are the voltages between 0 to 5 volt .

 

i use ttl to rs232 converter with max232
As botton pin is for vcc and The following result appeared on hyper terminals .
Each character that you see below is obtained by pressing tab button.


this device works like this that with Press tab button , Settings page device appears.
in your opinion , Why obtained this results ???

 

Using RS232 still need to following the rule as 9600,n,8,2, if the frequency or setting is n't the same then it won't work probably, you have to try it until they are the same.

 

Using RS232 still need to following the rule as 9600,n,8,2, if the frequency or setting is n't the same then it won't work probably, you have to try it until they are the same.

my device setting is 4800,n,8,1 . , i use this setting for connect to device in hiper terminal
in your opinion , device setting change when use converter ??

 

What you want to do is use one of the RS232 trouble shooting programs such as RS232HEX COM http://download.cnet.com/RS232-Hex-Com-Tool/3000-2383_4-10064973.html
You can set it for hex instead of ASCII and see the whole 8 bits.
The convertor seems to change from RS232 to 5v with an optical translator, you need to go direct to the RS232 if you can and then into the Lap Top 9 pin port.
Max.