rwraley

Question, we have several compact logix processors with no nonvolitale storage. When the units are powered down some retain integer values that were written from the OIT to Int[50] before power down and yet others revert back to the original programmed value default, which is what I would expect to happen. The logic uses an up pushbutton on the OIT to one shot an ADD 1 to the integer and a down pushbutton to one shot a subtract 1 to the integer to increment this positioner valve from 1 to 100%. The original default in the program is 24. Some go back to 24 after power cycle and some stay at 55 or what ever the last value was before power cycle. Can anyone explain if I have no non-volatile memory to write from on power up how this can occur? Thanks.

Thanks for the reply.

Does anyone have experience with these? I have Vijeo designer 4.3 on laptop. I would like to upload the project from HMI to have a backup and to make a few small changes. Tech support informs me that if there is no CF card installed an upload is not possible. Does this mean that it pulls the backup project off the card and not from internal memory? If this is true, is it possible to install a cf card upload to that and then upload to pc? Also they state in the literature that there USB cable is 'Special' does this mean that a standard usb to usb cable will not work? I have not tried any of this yet, I just want to get all my ducks in a row before I do. Thanks in advance for any replies or advice.

Hello, I had an error on one of our Versamax discrete I/O to devicenet interfaces. The code shows 2 flashes then 5 flashes repeatedly. The block was not communicating. I was able to recover communications by cycling control power, so I asssume this was a comm fault. I have searched through much documentation and also contacted tech support, but can't find of list of error codes can anyone point me in the right direction? Thanks.

Thanks for the reply. This drives got bigger problems, as evidence by the fact that the HIM wont power up as of this morning.

Hello, I have several AB Powerflex 700 drives communicating with the control system via 20-Comm-D DPI's. All but one are working fine. I am getting a "fault 85" "Port 5 Adapter not present" . The DN segment is ok. The only anomoly I can find regarding this drive is when I pull up the device config I notice that the drive product code (actual/ read) is different than the configured. Can you write this parameter or is it read only hard coded in the drive? Hope this rings a bell with someone! let me know if more info required. Thanks.

It ended being a bad (intermittent) com port on the CPU. Thanks for the response.

Hi all, I am not well versed in Modicon gear and have been trying to figure out an issue in which the Modicon 984 is talking to a UniOp EL25T operator interface over the MB1 port. It apparently worked fine for many years then the communications started to get intermittent and now are non existent. So you can not read or write to the registers from the HMI. I do not have the software for the HMI but can go online with the Modicon what are some things I can look for in the plc program that might clue me in? Is the MB1 port modbus over an RS-232 connection (RJ45{plc} to 15 pin D shell{HMI}).Any advice is greatly appreciated since I know zip of Modicon plc's. Thanks.

Do any of you happen to have any information on the pinout for a UniOp ELT25 talking to Modbus1 port on a modicon E984 processor.? Thanks.

Thanks Gerry! You are absolutely correct. I reversed my tags and it does work. It is just kind of a pain to have to create a derived tag for each actual tag instead of 1derived that will point to multiple actual tags.

Here is a screen shot of the expression where the tag "Global\FRI_DP_OFF_HOUR" is the value and I am trying to write it to the tags in the expression text box. Any Ideas? RSV.bmp

I had already tried that and it is not working. Maybe I am not writing the expression for the derived tag correctly. If I want to include multiple tags in the derived tag expression what is the syntax? Tag1&Tag2&Tag3 or Tag1,Tag2,Tag3

Does anyone know of a method within RS View32 using a numeric input field to distribute the input value globally to several nodes. For example if I have identical tags in all processors named (Node1\N7_0_TIME_ON), (Node2\N7_0_TIME_ON), (Node3\N7_0_TIME_ON), etc with one numeric input I would like to write the value to all nodes. The problem is when I set up the attributes for the numeric input it will only allow 1 tag to be specified as the destination. Is there a special character that can be used in the command line to "Stack" tag names? Any advice in this regard is much appreciated.

I really like the Dranetz power platform for these types of scenarios. Plus the Dranview software is easy to use manipulate data and generate reports.

I think you are on to something. If Linx is run as service it sometimes will not let go of the tag server after the project is closed. If i go to the RS linx launch control and stop it it does let the server close.