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Search: Posts Made By: danw
Forum: LIVE PLC Questions And Answers June 22nd, 2018, 06:31 PM
Replies: 10
Views: 174
Posted By danw
Updating the development software is an Excellent...

Updating the development software is an Excellent place to start.

Updates are free downloads, but difficult to find
...
Forum: LIVE PLC Questions And Answers June 22nd, 2018, 01:29 PM
Replies: 10
Views: 174
Posted By danw
It's been so long since I used serial, I can't...

It's been so long since I used serial, I can't remember the Gotchas. Why aren't you using the controller's default Ethernet port at 192.168.1.254?
Forum: LIVE PLC Questions And Answers June 21st, 2018, 09:21 PM
Replies: 8
Views: 358
Posted By danw
Honeywell has a mark the chart feature. Keyboard...

Honeywell has a mark the chart feature. Keyboard shows up on the touch screen and the message appears both on the trend chart and as an event message with the logged data. Or if the messages are...
Forum: LIVE PLC Questions And Answers June 21st, 2018, 09:18 PM
Replies: 1
Views: 127
Posted By danw
Fluke 773 clamps around one of the conductors to...

Fluke 773 clamps around one of the conductors to read the current.


The other Fluke has to be in series with one of the 4-20 lines, requiring opening the circuit at one point and inserting both...
Forum: LIVE PLC Questions And Answers June 21st, 2018, 08:59 PM
Replies: 5
Views: 472
Posted By danw
I suspect you'll have to find a vendor who...

I suspect you'll have to find a vendor who attaches a conventional RTD "tip" (the sensor) to a flexible sheath (the kind the bore scope/endoscope camera is attached to) and then runs the lead wire...
Forum: LIVE PLC Questions And Answers June 19th, 2018, 12:15 PM
Replies: 3
Views: 145
Posted By danw
I would recommend using the search function (not...

I would recommend using the search function (not the Google search, the site search above it) to see what’s been written about Maco over the years.
Forum: LIVE PLC Questions And Answers June 15th, 2018, 03:21 PM
Replies: 9
Views: 283
Posted By danw
what video did you watch about the RedLion...

what video did you watch about the RedLion Datastation setup?
Forum: LIVE PLC Questions And Answers June 8th, 2018, 01:48 PM
Replies: 9
Views: 426
Posted By danw
Good point on doing a flip/reversal in the PLC. ...

Good point on doing a flip/reversal in the PLC.

I thought most all level instruments offer an output for either

- level: low elevation at 0% output, high elevation at 100% output, or

-...
Forum: LIVE PLC Questions And Answers June 8th, 2018, 12:21 PM
Replies: 9
Views: 426
Posted By danw
It isn't clear whether the output can be...

It isn't clear whether the output can be reversed: 4mA = 100%; 20mA = 0%

The examples shown for the most likely settings to do that use conventional forward slope / shift in the same forward...
Forum: LIVE PLC Questions And Answers June 7th, 2018, 04:47 PM
Replies: 9
Views: 426
Posted By danw
1. process connections A differential...

1. process connections

A differential pressure transmitter has a process high side connection and a process low side connection.

For level sensing, the high side port connects to the lower...
Forum: LIVE PLC Questions And Answers May 31st, 2018, 02:36 PM
Replies: 3
Views: 138
Posted By danw
Like OkiePC says, Phoenix Contact TWE 900Mhz or...

Like OkiePC says, Phoenix Contact TWE 900Mhz or Banner DX80 900MHz for use in the US. Both are wired-in/wired-out for ease of use.


I'd use the Yagi antenna at the field node end and a high gain...
Forum: LIVE PLC Questions And Answers May 29th, 2018, 03:54 PM
Replies: 8
Views: 235
Posted By danw
Two channel pulse splitter spec sheet attached

Two channel pulse splitter spec sheet attached
Forum: LIVE PLC Questions And Answers May 29th, 2018, 02:35 PM
Replies: 20
Views: 748
Posted By danw
I've done several density measurements with...

I've done several density measurements with differential pressure sensing points at two different elevations and it takes the accuracy of a high quality industrial DP transmitter to get a useable...
Forum: LIVE PLC Questions And Answers May 29th, 2018, 02:27 PM
Replies: 20
Views: 748
Posted By danw
I've heard them called 'strapping tables' but...

I've heard them called 'strapping tables' but apparently others call them Dip tables.

The tank vendor probably provided one, the task can be getting the customer to put his hands on it.

Dan
Forum: LIVE PLC Questions And Answers May 29th, 2018, 02:23 PM
Replies: 8
Views: 235
Posted By danw
Should know what the frequency output range is. ...

Should know what the frequency output range is.


0-1Khz?
0-2Khz?
0-5Khz?
0-10Khz?


It makes a difference what sort of PLC I/O cards are used.
Forum: LIVE PLC Questions And Answers May 27th, 2018, 01:37 PM
Replies: 3
Views: 205
Posted By danw
You might check out this site for links to...

You might check out this site for links to research on coal stock pile fire mitigation:
https://www.researchgate.net/post/How_to_mitigate_spontaneous_combustion_in_Coal_stockpiles


Thermal...
Forum: LIVE PLC Questions And Answers May 25th, 2018, 06:11 AM
Replies: 8
Views: 363
Posted By danw
Be aware of temperature operating limits of...

Be aware of temperature operating limits of capacitive humidity sensors.

It isn’t clear whether your application requires absolute humidity, relative humidity or dewpoint.

You might want to...
Forum: LIVE PLC Questions And Answers May 23rd, 2018, 08:17 PM
Replies: 4
Views: 174
Posted By danw
Look at how little voltage a thermocouple...

Look at how little voltage a thermocouple produces (approximate values):

Type K 0 to 1200 Deg C = 0 to 48.8mV, 1 Deg C change ranges from approx 0.039mV to 0.034mV
Type J 0 to 1200 Deg C = 0 to...
Forum: LIVE PLC Questions And Answers May 18th, 2018, 02:32 PM
Replies: 3
Views: 258
Posted By danw
You need to enable ”cold junction (CJ)or ice...

You need to enable ”cold junction (CJ)or ice point compensation.

An isothermal thermocouple, one which is the same temperature at both ends, generates 0.0mV (in the absence of a temperature...
Forum: LIVE PLC Questions And Answers May 17th, 2018, 10:43 PM
Replies: 5
Views: 325
Posted By danw
What does the spec sheet for that make and model...

What does the spec sheet for that make and model say the accuracy is?

Are you sure the range is compound vacuum and positive pressure?

Is ±250 inches wc the fixed range or is the range...
Forum: LIVE PLC Questions And Answers May 16th, 2018, 11:03 PM
Replies: 13
Views: 501
Posted By danw
For the stated problem, a faulty continuous level...

For the stated problem, a faulty continuous level sensor that causes an overflow, the conventional industry solution is a high limit point level switch using a different technology than the primary...
Forum: LIVE PLC Questions And Answers May 16th, 2018, 10:43 PM
Replies: 5
Views: 325
Posted By danw
Like the guys say, Differential pressure...

Like the guys say, Differential pressure measurement is designed for DP. Subtracting one gage pressure reading from another can work OK if the readings and the difference are a good percentage of...
Forum: LIVE PLC Questions And Answers May 14th, 2018, 09:52 PM
Replies: 2
Views: 157
Posted By danw
A lot of point level detection is simple...

A lot of point level detection is simple switches, which switch an applied voltage.

What level detectors can't handle 24Vdc?
Forum: LIVE PLC Questions And Answers May 9th, 2018, 10:24 AM
Replies: 6
Views: 647
Posted By danw
There are engineering design guide books written...

There are engineering design guide books written on the topic of control system grounding.

The bottom line is, it's too time-intensive and costly for people at the controls end or integration end...
Forum: LIVE PLC Questions And Answers May 8th, 2018, 10:27 AM
Replies: 6
Views: 647
Posted By danw
If there is a potential difference between the...

If there is a potential difference between the power supply ground in the field device and the (-) return on the AI, then the signal will have an 'offset' created by a ground loop caused by the...
Showing results 1 to 25 of 500

 
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