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Search: Posts Made By: bernie_carlton
Forum: LIVE PLC Questions And Answers July 16th, 2018, 12:14 PM
Replies: 8
Views: 242
Posted By bernie_carlton
For reference can you show how you copied the two...

For reference can you show how you copied the two INTs into the Real?
Forum: LIVE PLC Questions And Answers July 12th, 2018, 10:29 PM
Replies: 1
Views: 116
Posted By bernie_carlton
Which application generates this? Under what...

Which application generates this? Under what conditions?
Forum: LIVE PLC Questions And Answers July 8th, 2018, 02:23 PM
Replies: 9
Views: 282
Posted By bernie_carlton
Create a one-shot for each signal. Use the RUN...

Create a one-shot for each signal. Use the RUN one-shot to set a latch. Use the STOP one-shot to release the latch.


If you state the PLC and software someone may be able to provide a specific...
Forum: LIVE PLC Questions And Answers June 27th, 2018, 01:49 PM
Replies: 14
Views: 435
Posted By bernie_carlton
Using the supplied output card in the 0-20ma mode...

Using the supplied output card in the 0-20ma mode in to a 500 ohm load should give you the controllable 0-10 volt output.
Forum: LIVE PLC Questions And Answers June 26th, 2018, 10:08 PM
Replies: 14
Views: 435
Posted By bernie_carlton
As the others have suggested it will take a...

As the others have suggested it will take a 'move' type command. In DirectSoft this would be the combination of an LD (load) command followed by an OUT command. The load can have a constant as its...
Forum: LIVE PLC Questions And Answers June 20th, 2018, 02:32 PM
Replies: 12
Views: 334
Posted By bernie_carlton
You won't be able to directly scale the unsigned...

You won't be able to directly scale the unsigned value to a signed value using y=mx+b math.
Forum: LIVE PLC Questions And Answers June 18th, 2018, 01:23 PM
Replies: 6
Views: 413
Posted By bernie_carlton
An activated JSR pauses scanning the current...

An activated JSR pauses scanning the current ladder immediately, jumps to and scans the target ladder, then returns and continues in the original ladder with the next instruction.
Forum: LIVE PLC Questions And Answers June 11th, 2018, 03:39 PM
Replies: 31
Views: 1,717
Posted By bernie_carlton
The PLC is using 32 bit reals. The PC computation...

The PLC is using 32 bit reals. The PC computation is probably using 64 bit reals.
Forum: LIVE PLC Questions And Answers June 6th, 2018, 11:52 AM
Replies: 8
Views: 237
Posted By bernie_carlton
Before each full scan, looking at all positions...

Before each full scan, looking at all positions 1-399, set a flag to zero. If the scan finds a non-zero value to display then set the flag to one. At the end of the full scan if the flag is still...
Forum: LIVE PLC Questions And Answers June 6th, 2018, 10:28 AM
Replies: 8
Views: 237
Posted By bernie_carlton
This sounds similar to displaying possible...

This sounds similar to displaying possible multiple alarms one at a time with a delay for viewing.
Forum: LIVE PLC Questions And Answers May 19th, 2018, 10:04 AM
Replies: 7
Views: 733
Posted By bernie_carlton
The sharing of information may be by way of...

The sharing of information may be by way of produced/consumed tags. Once defined these require no further message instructions.
Forum: LIVE PLC Questions And Answers May 9th, 2018, 10:09 PM
Replies: 16
Views: 1,131
Posted By bernie_carlton
You might want to get into the habit of assigning...

You might want to get into the habit of assigning 'N' registers as the source and targets of reads and writes in messages. At the 'input' PLC use simple rungs to copy the desired input states into a...
Forum: LIVE PLC Questions And Answers May 2nd, 2018, 11:54 PM
Replies: 1
Views: 368
Posted By bernie_carlton
To answer specifically we would have to know the...

To answer specifically we would have to know the place and specifically the hsc card (if not embedded in the main cpu). But since you imply that there will only be one input signal the the switch in...
Forum: LIVE PLC Questions And Answers April 23rd, 2018, 11:31 AM
Replies: 9
Views: 358
Posted By bernie_carlton
Isn't the whole purpose of an audible alarm the...

Isn't the whole purpose of an audible alarm the ability to cut through standard ambient noise with a very attention getting - i.e. annoying - sound?
Forum: LIVE PLC Questions And Answers April 20th, 2018, 10:58 AM
Replies: 6
Views: 416
Posted By bernie_carlton
Sorry for my rant then. ;)

Sorry for my rant then. ;)
Forum: LIVE PLC Questions And Answers April 20th, 2018, 10:34 AM
Replies: 6
Views: 416
Posted By bernie_carlton
I believe you are trying to 'fix' the wrong...

I believe you are trying to 'fix' the wrong thing. The SCADA is detecting the state of the system downstream from the VFD/motor. Thus it is sensing a failure of any component in between them and the...
Forum: LIVE PLC Questions And Answers April 20th, 2018, 09:52 AM
Replies: 8
Views: 359
Posted By bernie_carlton
Your LEQ and GEQ are ok, you are just comparing...

Your LEQ and GEQ are ok, you are just comparing to the wrong thing.
Forum: LIVE PLC Questions And Answers April 20th, 2018, 09:46 AM
Replies: 8
Views: 359
Posted By bernie_carlton
But you are using the saved values to generate...

But you are using the saved values to generate the window values using the offset from the HMI. You then compare to see samed saved values in the comparison. The saved values will never be outside...
Forum: LIVE PLC Questions And Answers April 20th, 2018, 09:17 AM
Replies: 8
Views: 359
Posted By bernie_carlton
You are comparing your saved values with the...

You are comparing your saved values with the window limits. Change them to the live values. E.g. you are using Tension_1_Control in the comparison, use Tension_1 instead.
Forum: LIVE PLC Questions And Answers April 12th, 2018, 02:19 PM
Replies: 20
Views: 1,030
Posted By bernie_carlton
You casually mentioned changing an 'input...

You casually mentioned changing an 'input instruction' but it is still unclear. If you attempt to change a bit corresponding to a physical input in your system the point will quickly be overwritten...
Forum: LIVE PLC Questions And Answers April 11th, 2018, 02:17 PM
Replies: 1
Views: 157
Posted By bernie_carlton
Many PLCs have 16 bit registers though more...

Many PLCs have 16 bit registers though more modern ones have 32 bit registers.

If the display is transmitting a larger number (greater than 65536) correctly then it may be spanning more than one...
Forum: LIVE PLC Questions And Answers April 10th, 2018, 09:36 AM
Replies: 3
Views: 168
Posted By bernie_carlton
Often a specific set of states used to trigger...

Often a specific set of states used to trigger one output is also used as part of determining other outputs. Rather than totally replicating the first rung they will combine the result of that first...
Forum: LIVE PLC Questions And Answers April 1st, 2018, 11:04 AM
Replies: 4
Views: 445
Posted By bernie_carlton
Use a For/Next loop with each itiration being: ...

Use a For/Next loop with each itiration being:

Float_Array[x] = Boolean_Array[x]

If it doesn't like the math then just use two rungs:

XIC Boolean_Array[x] MOV 1.0 Float_Array[x]

XIO ...
Forum: LIVE PLC Questions And Answers March 27th, 2018, 11:18 AM
Replies: 5
Views: 474
Posted By bernie_carlton
I think that would be a 12 volt intermediate...

I think that would be a 12 volt intermediate relay for the 9th lamp.
Forum: LIVE PLC Questions And Answers March 25th, 2018, 11:29 PM
Replies: 5
Views: 414
Posted By bernie_carlton
Use a counter to count all the pulses. Create a...

Use a counter to count all the pulses. Create a one shot on the rising edge of the lowest bit of the counter's accumulator. Create another one shot on the falling edge of the same bit. Use these one...
Showing results 1 to 25 of 500

 
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