interfacing fresenius vial syringe pump with rs 232

[sharma_g]

I am trying to read data from fresenius vial pilot C syringe pump. Getting following error in read operation:

"Timeout expired before operation completed". I have checked the baud rate, parity etc and also the rs 232 cable. Where can be the problem?

[Dennis_Knutson]

You could be sending the wrong command or incorrect termination character(s). What does the manual say? What is the exact string that you are sending? Where is the manual? Does it work with a program such as putty or in MAX?

[sharma_g]

Manual is attached. I am not able to read through MAX also.

[Dennis_Knutson]

Since you have not answered my question about the exact string you are sending, I can only guess that that you are not sending the correct commands in hex format. Use an U8 array and the Byte Array to String function and calculate the check sum correctly.

[sharma_g]

I am also trying to use attached program. Put nothing coming in read display.

[sharma_g]

I am using following string to write:

[02h]\s3PR;1F4014\s[03h]

[sharma_g]

First of all I need to change to PC mode. For this I am sending through MAX:

02 33 4D4F3B32 C3 03

entire command is in hex format

and I am getting error "Time out expired before operation completed".

RS232 protocol is attached.

regards,

Manu

[sharma_g]

First of all I need to change to PC mode. For this I am sending through MAX:

02 33 4D4F3B32 C3 03

entire command is in hex format

and I am getting error "Time out expired before operation completed".

Please help.

RS232 protocol is attached.

regards,

Manu