BobB

Thanks Woody - I am not using the NA screens so did not know that. Maybe an improvement request?

Have you installed the font on the computer? CX-Designer uses the Windows fonts. I like using Khmer UI - nice and clear. It is not in Windows 10 but can be installed and utilised.

Is it possible the machine is shaking the PLC causing the bus connectors to disengage? Have you taken the PLC apart and reconnected the bus? Is it possible that the connector slides are not made properly? I/O Bus Error is often a mechanical issue like this.

No - the data memory is backed up by a battery.

I thought you could use MOVD to move digit 2 to digit 4 in another word and so on. Just have to do one at a time? I also thought you could use MOVB to move multiple bits in the same way? Have not used either for many years so not sure but worth a look?

Yes - but if not powered down not a problem. Can be re-written from the screen anyway.

Here is a bit more - this is to turn pumps to night speed and day speed. The hour and minute values are written to D2020, 21, 22 and 23 from a touch screen. the SWAP function is used to swap the minute bytes to make the comparison easy. ANDW is really very easy to use and I use it here as a mask to block hours and let through minutes and to block minutes and let through hours. While the settings are in HEX they are actually read in binary - HEX is a leftover from older Omron PLCs to allow those programs to be easily converted to newer PLCs I believe. The settings in D2020, 21, 22 and 23 are actually HEX values. Time Clock.cxp

Here is how to extract minutes and hours to separate channels with a mask.

That is the HR area - holding relays. If in CIO select CIO from the drop box then the channel and bit number on the right - easy as.

Just type in the address e.g. 300.01.

If you use the alarm history object you can set the ring buffer to say 1000 alarms and they will be saved there. The ring buffer is FIFO.

Pair of typical Old Phfarts Jay - no patience - has to happen NOW! LOL

Bugger! Too slow - never be quicker for mine. Came up with DOS software - typing in an I/O address wins hands down compared to symbols. Anyway! Must be getting old and grumpy!

What a ruddy pain! IEC crap! Sticking to the CJ2M and CX-P for a lot of reasons. Bloody European requirements are a load of rubbish for mine. Way to slow to program. Studio is really a PITA. Give me CX-P anytime. Sorry - not helpful but how I feel - must be getting old and cranky! And I have to program a Schneider redundant system shortly - very painful also.

You can probably get it here https://industrial.omron.eu/en/services-support/technical-tools/downloads/download-software-cx-one-trial-version

Update CX-One and it works fine. Been using it since Windoze 10 came out.

No - Modbus only has one master. I have managed to organise 2 Modbus masters in a Red Lion protocol translator though - not the same.

Your previous post about this has been answered.

And people wonder why I will not use the new ones! Sticking with CJ2 and CS1 - oh and CP1. I program on the keyboard using numbers - symbols are stupidly slow! I have a job to program with Schneider - symbols - painful - if you want to use the keyboard %I. then rack number - then slot number - then bit number! Studio is not much better!

OK - it is just that the last encoders I used were scaleable in the encoder - made it easy.

In the encoder?

Perhaps the peripheral port is dead. Check the manual - you can set the serial port to a default value and try again with a serial cable? Just be careful - the Omron serial cable is not standard. cable is 2-3, 3-2, 4 & 5 tied together at the computer end and 9-9 if I remember correctly - check and make sure - I have not used a serial cable for many years.  

You need CX-Programmer. You will have have to re-create the I/O table.

Contact Omron or a distributor.

W or work bits are just non retentive internal bits - known as M bits in other PLCs. CIO is common I/O bits and are used as inputs, outputs, and non retentive work bits as well. I rarely use W bits but just use CIO for most of my programming. You can also use the W area as non retentive words, as you can with the CIO area. The ability to access the D area as bits is only fairly recent - CJ2M if my memory is correct. D and H areas are both memory retentive.