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Search: Posts Made By: parky
Forum: LIVE PLC Questions And Answers February 10th, 2020, 11:58 AM
Replies: 5
Views: 4,327
Posted By parky
First of all, have you got a copy of the plc...

First of all, have you got a copy of the plc program, because if not removing the battery & doing a reset will dump the program. If you have the S5 software, connect to the PLC using the tty port...
Forum: LIVE PLC Questions And Answers February 10th, 2020, 09:55 AM
Replies: 1
Views: 122
Posted By parky
I suggest you move this into the live Q&A as not...

I suggest you move this into the live Q&A as not many people will look here it's really just for practice posting.
Also you are on about scan times, this is not relevant as it will depend on PLC.
Forum: LIVE PLC Questions And Answers February 10th, 2020, 06:21 AM
Replies: 14
Views: 359
Posted By parky
Personally I like the old S5 Indirect addressing...

Personally I like the old S5 Indirect addressing but then again I'm old school so cut my teeth on S5.:dance::dance:
Forum: LIVE PLC Questions And Answers February 9th, 2020, 11:06 AM
Replies: 14
Views: 359
Posted By parky
Yes correct, The value in DB103 DBD140 will...

Yes correct, The value in DB103 DBD140 will contain a M bit pointer i.e. 10.0 so it equates to M10.0
ignoring the indirect it is the same as
A M 10.0 // A M[DBD140] contains 10.0
= M206.0
Forum: LIVE PLC Questions And Answers February 8th, 2020, 11:08 AM
Replies: 4
Views: 287
Posted By parky
The best way if the operator really needs to...

The best way if the operator really needs to change the recipe is to have an edit screen for the current recipe that has operator entry. We did this on a number of systems for example the HMI's held...
Forum: LIVE PLC Questions And Answers February 8th, 2020, 06:18 AM
Replies: 12
Views: 559
Posted By parky
Firstly you would need two controllers i.e. one...

Firstly you would need two controllers i.e. one for pressure and one for flow just using a pump would not work, to try to control a pressure and flow with one pump would be difficult. Pressure and...
Forum: LIVE PLC Questions And Answers February 6th, 2020, 05:39 AM
Replies: 2
Views: 205
Posted By parky
Some time since I did RSL500 but what values have...

Some time since I did RSL500 but what values have you in the in min & in max if there is a divide by zero i.e. if theses are zero then it could cause a error.
Try putting fixed values in first.
Forum: LIVE PLC Questions And Answers February 4th, 2020, 10:45 AM
Replies: 22
Views: 809
Posted By parky
There is nothing wrong with latches first of all,...

There is nothing wrong with latches first of all, if the latches are in the non retentive area they will be reset on power up (check your documentation).
Keep latch & Unlatch on consecutive rungs if...
Forum: LIVE PLC Questions And Answers February 3rd, 2020, 11:21 AM
Replies: 4
Views: 271
Posted By parky
I suggest you post this in the Live Q&A as most...

I suggest you post this in the Live Q&A as most do not read this area
Edit: 32768 is -0 as 32767 is max for 16 bit word you need to read it as an integer so you get negative values
32767 = +0...
Forum: LIVE PLC Questions And Answers February 3rd, 2020, 05:15 AM
Replies: 9
Views: 279
Posted By parky
No for example B3:1/0 is B3:16 so if you divide...

No for example B3:1/0 is B3:16 so if you divide say 300 by 16 then without the decimal places you get 18 i.e. 18 x 16 =288 so it becomes B3:18/12
so you need to do the maths. I believe if my memory...
Forum: LIVE PLC Questions And Answers February 3rd, 2020, 04:19 AM
Replies: 9
Views: 279
Posted By parky
If I remember correctly all addresses are File...

If I remember correctly all addresses are File Type. i.e B File No. i.e. 3 / Word No. i.e. 2 / Bit No. i.e. 12

So For Bits it can be B3:1/1 so word 1 has 16 bits this can be addressed as B3:16....
Forum: LIVE PLC Questions And Answers February 2nd, 2020, 12:18 PM
Replies: 15
Views: 793
Posted By parky
Mitsubishi have one shot in LD & ST and that is...

Mitsubishi have one shot in LD & ST and that is what I coded in, however, the reason for the home brew ones was that I did not know what plc the poster is using and for clarity did it that way,...
Forum: LIVE PLC Questions And Answers February 2nd, 2020, 11:59 AM
Replies: 4
Views: 373
Posted By parky
I have just retired and should have more time,...

I have just retired and should have more time, however, the other half (AKA the wife), compiles a list of jobs for the day so no peace for me :yakyak:
Forum: LIVE PLC Questions And Answers February 2nd, 2020, 11:39 AM
Replies: 4
Views: 639
Posted By parky
Brine by nature is a little corrosive after all...

Brine by nature is a little corrosive after all that is what sea water is, often brine systems especially for food systems. so I would be a little shy of cheap ones.
Forum: LIVE PLC Questions And Answers February 1st, 2020, 06:13 AM
Replies: 4
Views: 373
Posted By parky
Not sure about other countries but in the UK most...

Not sure about other countries but in the UK most traffic light systems use a combination i.e. Induction loops, Sensors & cameras for controlling the traffic flow. Induction loops are most prevalent...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 10:46 AM
Replies: 2
Views: 206
Posted By parky
Kepserver do an Opto 22 Driver (Ethernet) you can...

Kepserver do an Opto 22 Driver (Ethernet) you can download a trial of Kepserver, although I do not know if that particular driver is in the suite as standard it works for 2 hours at a time.
Here is...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 07:31 AM
Replies: 5
Views: 265
Posted By parky
Surely for 3 screens with independent control you...

Surely for 3 screens with independent control you need client licenses for each machine. Long time since I used Wonderware but I assume this is what you mean, In something like IFIX you have one...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 06:50 AM
Replies: 2
Views: 169
Posted By parky
Can you post a pic of the ladder i.e. pdf of a...

Can you post a pic of the ladder i.e. pdf of a printout or bitmap. It may help. No experience of ISPSoft but looking at your logic may help, to me loop error could point to what is known as reverse...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 06:43 AM
Replies: 2
Views: 201
Posted By parky
Try this from ABB ...

Try this from ABB
https://new.abb.com/docs/librariesprovider53/about-downloads/low-voltage-motor-guide.pdf
Forum: LIVE PLC Questions And Answers January 31st, 2020, 06:33 AM
Replies: 10
Views: 428
Posted By parky
Sounds to me like the Scada developers are...

Sounds to me like the Scada developers are pushing some of their work onto you, This is often the case, I did a system where we had to provide a Data concentrator PLC which gathered the data from...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 06:29 AM
Replies: 15
Views: 793
Posted By parky
No problems Drbitboy, perhaps I was a bit over...

No problems Drbitboy, perhaps I was a bit over the top and tetchy, must be my age lol. Your explanation is accepted without question.:beerchug:
Anyway, just an explanation as to why I put ladder...
Forum: LIVE PLC Questions And Answers January 30th, 2020, 12:41 PM
Replies: 2
Views: 244
Posted By parky
Another alternative is to use a Hydrostatic...

Another alternative is to use a Hydrostatic pressure type level sensor or differential one in the bottom of the tank i.e. Endress & Hauser, However, you would need to add a hygienic process fitting...
Forum: LIVE PLC Questions And Answers January 30th, 2020, 08:23 AM
Replies: 1
Views: 111
Posted By parky
Maybe this will help. ...

Maybe this will help.
https://support.industry.siemens.com/cs/document/48064324/simatic-s7-300-getting-started-commissioning-a-cpu-31xc%3A-counting?dti=0&lc=en-WW
And this:...
Forum: LIVE PLC Questions And Answers January 30th, 2020, 08:01 AM
Replies: 15
Views: 793
Posted By parky
I agree they are not needed, this was a quick &...

I agree they are not needed, this was a quick & dirty bit of code and my time is precious. However as you pointed out they are not in the ST. Perhaps instead of criticising you could give the poster...
Forum: LIVE PLC Questions And Answers January 30th, 2020, 05:36 AM
Replies: 15
Views: 793
Posted By parky
Try this: I have written it in a way that shows...

Try this:
I have written it in a way that shows built one shots, however, Depending on your plc you could use OSR or Pulse, toggle if they exist.

On_Oneshot:= Button & NOT ON_Latch;
ON_Latch:=...
Showing results 1 to 25 of 500

 
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