Internet PLC Forum

Hi There,
Has anybody got some experience in transmitting text files?
I have 3 TM100MD+ with RTC  and each is connected  to a Fargo Mobile modem

Each unit dials in every morning and dumps the content of the DM[] array, using TLServer on a host machine.
This  basically works fine. The output from each DM[] array is formatted while sending in order to reflect records in a database
The format is as follows:

Date, time, value1, unitID, value2 >CR>

Two of the units usually return 50-70 lines ( i.e. records) and one unit usually returns 100-200 records.
I have received approximately 15.000 records this way during the last months but every week I get some transmission errors where some characters are lost.
My SQL database can handle the import errors, but I loose data.
What can I do to raise the transmission quality or even better how can I check that the transmission is ok on a character level?

I check for the <OK> when I close the text file with Print#1 "/" Command but these errors are in the middle of the transmission.


Examlpe 1 Line 3: the characters "3,0 <CR>" are lost
 
20-12-2006,15:34:28,1,123,0
20-12-2006,15:35:42,3,123,0
20-12-2006,15:35:48,3,1220-12-2006,16:14:10,1,123,0
20-12-2006,16:14:12,3,123,0
20-12-2006,16:14:39,1,123,0
20-12-2006,16:17:25,1,123,0
20-12-2006,16:19:12,1,123,0


Example 2 line 4: ?30-12-? is sent twice
30-12-2006,15:26:09,3,123,7
30-12-2006,15:26:15,3,123,1
30-12-2006,15:26:26,2,123,0
30-12-30-12-2006,15:27:13,1,123,1
30-12-2006,15:27:15,1,123,1
30-12-2006,15:27:18,1,123,0
30-12-2006,15:29:44,1,123,11



Example 3 line 4: almost a whole line is lost

21-12-2006,15:03:08,3,123,0
21-12-2006,15:03:10,2,123,0
21-12-2006,15:03:35,1,123,0
21-12-2006,15:03:38,:41,1,123,0
21-12-2006,15:11:55,3,123,0
21-12-2006,15:12:02,2,123,0
21-12-2006,15:12:04,1,123,0
21-12-2006,15:12:07,1,123,0

The examples are just cut out from the complete text files, and the errors usually occur after line 140 typically around line 150-160.

This makes me wonder whether I have a programming error in formatting and sending the file,
but I doubt that this is the case since it is a simple:  for i = 1 max DM size loop,  and it works fines "most" days

Any ideas how can improve transmission check




/Peter

This is what it looks like
                                        SUB D 15 Modem
2    --------BLUE-------------- 2   TX

3      --------GREEN-------------6 RX

                                    |---- 7 DSR
                                    |-----8 DTR

5   -------Gray-----------------9  GND

You say your speed is 9600 but are you positive this speed has also been set on the Modem?

HTH

Peter

Thanks for the suggestions. The error, however,   was once again to be found 15 inches from the screen...

I made a divide by zero error in the mail I send out so the mail stops half way. The error only occurs in very seldom cases but never the less it happens and I had forgotten to check for it.

will probably be back soon with other questions. Once again thanks for the prompt support

/Peter

Yes the RTC is installed and has been working. The power is is cut at the 220V side, so that is not the problem. I will try changing the RTC when a new supply arives next week, unless you have another suggestion

I am using a T100MD+. After downloading a new version of a program i usually say YES to Reset. But now I would like to make some minor modifications to the program and retain the information aleady captured in DM[] + leave the RTC untouched. If I download a new software and say NO to Reset, wille it perform correctly and retain the DM[] values?

I am using a T100MD-888 with RTC connected to a Fargo Modem. Once or twice per day the PLC dials a number, connects to a PC running TLServer, dumps the DM memory to a text file and sends a short email with 3 values taken from DM[].
Recepient is defined as myname@mydomain.dk and sender as sender@anotherdomain.dk

This has been working fine for two weeks.
But yesterday i received the  email from the PLC/TLServer from "plc@plc.com"

where does that name come from?  It only happend once! The nex email a few hours later was correct.

Any aideas?

Hi there,

I?ve got a new small problem:
I would like to ?filter? the input on 3 input channels, so that I max use one input per 3 seconds.

The inputs are Push Buttons activated by humans. And I don?t want to record somebody activating a button e.g. 10 times i 3 seconds.
I would therefore like to make all 3 inputs inactive for a specific time ( e.g. 3 seconds) when one of the inputs has been activated.
I can do this in Tbasic with the ?Delay? function, but that stops everything else which is not intended.

I just want to stop these 3 inputs from responding

Can somebody help me  with a solution in Ladder instead? Something like this:


Input1 ------- Block   -------------------I-- Out1
                      N.C.                              I-- Block ? Ideally a 3 sec relay
                                                           I--  Function1 ? My stuff   

Input2 ------- Block   -------------------I?Out2
                        N.C.                                        I-- Block
                                                           I--  Function2 ? My stuff   

Input2 ------- Block   -------------------I?Out2
                         N.C.                                   I-- Block
                                                           I--  Function3 ? My stuff   

Thanks, I'll just retype the I/O table. I  like testing new features in a separate file before "messing up" the main file, but insetad I'll just use a copy of the main file if there are to many I/Os