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Search: Posts Made By: Mispeld
Forum: LIVE PLC Questions And Answers June 2nd, 2021, 09:12 AM
Replies: 32
Views: 2,725
Posted By Mispeld
This might be worth trying, which can sometimes...

This might be worth trying, which can sometimes clean up launch issues, especially when no known actions caused the problem.:


Default Studio 5000 as follows

>> Go to C:/Program Files...
Forum: LIVE PLC Questions And Answers May 25th, 2021, 01:05 PM
Replies: 5
Views: 602
Posted By Mispeld
Back to the original question...an alternative to...

Back to the original question...an alternative to comparing actual position to command position is to use the PositionLockStatus bit to indicate the axis is within the lock tolerance of the command...
Forum: LIVE PLC Questions And Answers May 17th, 2021, 01:15 PM
Replies: 6
Views: 739
Posted By Mispeld
While the linked thread references the PowerFlex...

While the linked thread references the PowerFlex 70 drive, it is worth reading for some information and opinions on brake resistor setup.

PowerFlex 70 Braking with External Resistor...
Forum: LIVE PLC Questions And Answers May 2nd, 2021, 11:46 AM
Replies: 10
Views: 1,405
Posted By Mispeld
Thank you for helping to break through the...

Thank you for helping to break through the mindset going into the project that all the ancillary machines will be CompactLogix. That direction made sense until the communications requirement-creep...
Forum: LIVE PLC Questions And Answers May 1st, 2021, 09:52 PM
Replies: 10
Views: 1,405
Posted By Mispeld
This is a new machine, but I can say two of the...

This is a new machine, but I can say two of the networks will be on the lower traffic side, mainly consisting of data-oriented messaging and supervisory control (as opposed to I/O and motion on the...
Forum: LIVE PLC Questions And Answers May 1st, 2021, 09:40 PM
Replies: 10
Views: 1,405
Posted By Mispeld
Not having used the 5380, and none available for...

Not having used the 5380, and none available for testing, I am nervous about whether these ports behave like independent ENxT modules in the Control Logix platform. It seems like they should, in...
Forum: LIVE PLC Questions And Answers May 1st, 2021, 09:31 PM
Replies: 10
Views: 1,625
Posted By Mispeld
That is crazy. Yet there it is in...

That is crazy. Yet there it is in black-and-white, and makes no sense. Must have been some kind of error in the Logix platform implementation because the PLC-5 PID.CV target is always an integer.
...
Forum: LIVE PLC Questions And Answers May 1st, 2021, 08:42 PM
Replies: 10
Views: 1,625
Posted By Mispeld
What's described above should work as long as one...

What's described above should work as long as one of the following is true:
1. There is a non-zero integral gain, or
2. The Bias Back-calculate bit is set.

This assumes the SP/PV error is not...
Forum: LIVE PLC Questions And Answers April 30th, 2021, 04:46 PM
Replies: 10
Views: 1,405
Posted By Mispeld
Thanks for the feedback. Sounds like it's time...

Thanks for the feedback. Sounds like it's time to get the "Network Team" involved. Ugh.
Forum: LIVE PLC Questions And Answers April 30th, 2021, 02:30 PM
Replies: 10
Views: 1,405
Posted By Mispeld
Compact Logix on Multiple Networks

I am reviewing a proposal where a Compact Logix processor needs to be on three (3) separate Ethernet networks. For the sake of argument, say that these networks will will be these IP address ranges:...
Forum: LIVE PLC Questions And Answers April 29th, 2021, 04:50 PM
Replies: 22
Views: 3,263
Posted By Mispeld
Consider reviewing this link, which is a bit of a...

Consider reviewing this link, which is a bit of a good thing, if you continue using XLM. Apparently Microsoft is committed to supporting XLM for the time being.

XLM + AMSI: New runtime defense...
Forum: LIVE PLC Questions And Answers April 17th, 2021, 10:33 AM
Replies: 10
Views: 1,244
Posted By Mispeld
If this is a Logix 5000 platform, one approach...

If this is a Logix 5000 platform, one approach will be to use a string whose contents is ABABCDCD... The shift counter will index into the DATA array within the STRING type to pull the character...
Forum: LIVE PLC Questions And Answers April 15th, 2021, 11:50 AM
Replies: 18
Views: 1,731
Posted By Mispeld
What happens when MBTU_MB_3xx[2] equals zero (or...

What happens when MBTU_MB_3xx[2] equals zero (or one, for that matter)?

And, technically, the result is off by 2 bits when the INT is negative.
Forum: LIVE PLC Questions And Answers April 14th, 2021, 06:32 PM
Replies: 10
Views: 1,107
Posted By Mispeld
I realize the customer wants to automate...

I realize the customer wants to automate temperature control, but the description sounds more like a measurement problem in that product quality is the feedback on whether the belt temperature is in...
Forum: LIVE PLC Questions And Answers April 14th, 2021, 11:18 AM
Replies: 18
Views: 1,731
Posted By Mispeld
In order to make it unsigned, you will need to...

In order to make it unsigned, you will need to test the INT value. If GEQ zero, move to a DINT. If LES zero, add 65536 to the INT value into the destination DINT. Then divide the (unsigned) DINT...
Forum: LIVE PLC Questions And Answers April 9th, 2021, 08:07 AM
Replies: 2
Views: 542
Posted By Mispeld
+1 on the thank you

+1 on the thank you
Forum: LIVE PLC Questions And Answers April 7th, 2021, 09:47 AM
Replies: 17
Views: 1,849
Posted By Mispeld
While the issue described in the linked technote...

While the issue described in the linked technote is for a different issue, the ctrl-shift launch sometimes fixes Logix software startup problems.

Studio 5000 v28: Unable to select bit-level tag...
Forum: LIVE PLC Questions And Answers April 5th, 2021, 03:32 PM
Replies: 1
Views: 476
Posted By Mispeld
Guardlogix 5380 Firmware V31 & V32 Issue

This seems worthy of cross-posting here since many people may be potentially affected by this anomaly.

Product Notice 2021-02-003 - GuardLogix 5580 Controller with V31 through V32 Firmware May...
Forum: LIVE PLC Questions And Answers March 16th, 2021, 11:14 PM
Replies: 10
Views: 907
Posted By Mispeld
When the loop is in software manual (.SWM set),...

When the loop is in software manual (.SWM set), the set output (.SO) input is used to "pass-through" the desired manual value to the CV. In addition to clearing the loop after the test, there is a...
Forum: LIVE PLC Questions And Answers March 15th, 2021, 08:51 AM
Replies: 14
Views: 1,544
Posted By Mispeld
There appears confusion between the AOI's data...

There appears confusion between the AOI's data type and what the AOI expects as parameters. For example, BCM_3 is declared as the AOI's data, but then is being passed into it the first argument. ...
Forum: LIVE PLC Questions And Answers February 27th, 2021, 01:46 PM
Replies: 141
Views: 15,167
Posted By Mispeld
Some of your (non-mutually-exclusive) options...

Some of your (non-mutually-exclusive) options moving forward:

1. Continue trial-and-error tuning with limited information available. As noted, the second set of results now showing PV and CV in...
Forum: LIVE PLC Questions And Answers February 22nd, 2021, 08:56 AM
Replies: 141
Views: 15,167
Posted By Mispeld
Post #11

Post #11
Forum: LIVE PLC Questions And Answers February 16th, 2021, 01:30 PM
Replies: 141
Views: 15,167
Posted By Mispeld
If you only move the integral setting by that...

If you only move the integral setting by that amount, response is very likely to become unacceptably slow. I strongly suggest eliminating derivative and deadband along with a modest increase in...
Forum: LIVE PLC Questions And Answers February 15th, 2021, 08:42 AM
Replies: 141
Views: 15,167
Posted By Mispeld
I missed this part about valve response problems...

I missed this part about valve response problems over a significant part of the CV range. If you have a flow measurement, it is not uncommon to linearize the valve response by manipulating the PID...
Forum: LIVE PLC Questions And Answers February 14th, 2021, 05:59 PM
Replies: 141
Views: 15,167
Posted By Mispeld
Considering a process lag in the 10's of minutes,...

Considering a process lag in the 10's of minutes, a filter with a 10-second time constant is not unreasonable. That is kind of long in my experience for dealing with instrumentation noise. ...
Showing results 1 to 25 of 500

 
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