Mendon Systems

CIO 2000 is the control word for the MAD42. It should be set to #3 to enable both outputs. The first output word is CIO 2001.

For that configuration the analog data will appear in CIO words 001-004 (AD041 inputs 1-4). You will need to initialize the AD041 module on startup to set the range by writing HEX data into words 101 and 102. The details of the settings are in section 7.2 of the W471 manual. To set all four AD041 inputs to 0-5vdc you would write #80FF HEX into both CIO 101 & 102 at startup (P_First_Cycle on). The analog data will magically appear in CIO words 001-004 with a range of 0-6000 corresponding to 0-5vdc.

That's because turning off PartInFeeder  causes T3 to time out which moves 4 into CurrentSequence.  

It sounds like something else in your program is using that register but without a LOT more information it's only a guess.

Jay, I'm inclined to agree with you after reading his last post. All he would need to do is convert his INT to BCD and then convert it to ASCII with the STR8. Since he's apparently looking for a fixed length string of 5 digits a MID$ instruction would get rid of the leading zeroes for him.

There are a few things that are a bit difficult with Omron, and you happened to pick a great example of that. For almost everything else they are quite easy to work with. Consider those data type warnings to be just advisory. It is possible to write a program that does not include any warnings, but generally not worth the effort.

If the number is >32767 you can move the value into a Dword and use the FLTL instruction to convert it. That handles numbers up to 2,147,483,647.

There IS another way to do it, but it is cumbersome at best. Convert the decimal value to floating point with the FLT instruction. Add 0.5 with the +F instruction. Convert the floating point number to a string with the FSTR instruction. The reason for adding 0.5 is that the FSTR instruction will truncate rather than round up so 0.9999 will result in 0 rather than 1. You will need to set the FSTR control words to 0 (decimal format), 5 (total # of digits), and 0 (# of decimal digits).

Take a look at the ASC(086) instruction. It converts BCD digits into a string.

Are you using a C200H-CN220 cable? A standard DB9 cable will not work because the PLC serial port has a non-standard pinout.

That is possible I suppose. You could try updating your driver to see if that helps. Some of the USB/serial adapters will work with one computer or PLC and not work with another one. What type of adapter is it???

Possibly something has disabled the serial port on your PC??? Check Device Manager to see if the com port shows up as working OK.

I've never even seen a Siemens PLC so I can't help you there.

From a functional standpoint the only difference in those 3 is that the W memory area data is cleared during a restart and there are some restrictions on accessing D memory at the bit level depending on what CPU you have. In theory the W area should be used as Work (scratchpad) memory, the D area should be used for Data storage, and the H area should be used for Holding bit storage. In practice you can use them however you want in your program.

I agree with Bob. That description sounds like a timer that is being used to generate some sort of clock pulse. The timer contact will be true for one program cycle whenever the timer expires. For example: if that timer is set to 5 seconds then the timer contact will be true for one scan every 5 seconds. There will be at least one more contact of that timer used somewhere else in the program as a clock pulse, probably to start (or stop) some logic sequence.

Not entirely sure what you are asking but ...... You can use any contact format of a timer that you want (NO or NC, and differentiated ON or OFF). The contact identification for timer #10 would be T0010. The mnemonic would be LD T0010 for a NO contact. If you are defining a symbol for a timer be sure to define it as a BOOL not a TIMER. The TIMER object type only applies to the CJ2M, but CX-P will default to TIMER for other CPU types also.

At the bottom of the Edit pull down tab is a "Delete Unused Symbols". I have never tried it so proceed at your own risk (i.e. be sure you have a backup copy) !!!

Take a look at Tag Data Links, section 6 of the W465 manual. That's probably going to be the easiest way.

You can use the P_First_Cycle flag to turn the bits off directly as Bob suggested. You can also use the TKON(820) & TKOF(821) instructions to turn on and off an entire task at any time you want. I often create an initialize task that runs once at startup and turns itself off with the TKOF instruction when complete. This works best if you assign the startup task as cyclic task 00 with Operation Start checked (default) and include a TKOF instruction as the last rung of the task immediately before the END(001) instruction.

That doesn't sound too difficult, but the logic for Up versus Down may take some thought. You can run a timer (maybe 1 second) from the button input then energize the Up or Down output when the timer expires. The trick is to decide which one you want to energize.

I have those two devices also. My Syba card has worked perfectly. The Belkin adapter works for most applications, but not all of them. I also have a Keyspan which will usually work when the Belkin doesn't.

Just for the record ...... The General Topics forum icon is still not working. The Omron forum icon is fixed.

You cannot do that. You will have to re-arrange the ladder or split the logic into separate rungs.

The icon for the Omron forum is working correctly again. The one for the general topics form is still broken.

Yes, I am aware of the individual "mark forum as read" and "mark site as read". That's not really the issue though. The new content icon is still not working as it should.