[burnthills]

Hello,

Recently the machine has been "losing" characters after a program transfer.

I program everything on a PC and send everything through a DB-25 cable. This has worked fine for years but in the last few months, the code the machine receives will be missing a character, any character. One time it was missing a "Y" character, one time it was a "2" in a position. Sometimes it leaves out the end-of-block character.

1. Re-sending the program fixes the problem most of the time.

2. I tried a different A-B box, same problem.

3. I tried a different cable, same problem.

Can anyone suggest anything? Is it the RAM? Is it the ROM? Is it noise in the line? We have not installed any new electronics or equipment in the area where the cable runs. There is a large air conditioner close to the line but it has been there for at least a year and this is only a recent problem.

The replacement cable I ran is about a foot below where the original cable is, so it should be further from the AC roof unit.

Please help! I don't like when the machine goes to Y0.725 instead of Y20.725 due to lost characters!

[scudzuki]

I think you mean you use a serial cable.

Have you tried slowing down the communications, say from 9600 to 4800 baud? You will have to change it at both ends, the control and the PC Com program.

Joe

[stevewortley]

I am having similar problems with the A2100 when drip feeding but ok when transfering programs. I have been advised to use a shielded cable which i am having made at the moment. Have also been told that using com port inside the cabinet is a better option.