Control.com - Forum for Automation Professionals

7
replies

Registers in Modbus Communication

on 11 October, 2018 - 5:56 am

Registers read 2 bytes and it was already identified. What if the byte you need to read is byte 5 to 8, what will be the register number?

New Replies:

By David_2

on 23 October, 2018 - 11:52 am

Let's make sure it is understood what you are trying to do. 1. You want the recorder (the Modbus...

By David_2

on 23 October, 2018 - 11:47 am

Would you please post a link to the manuals that include the Modbus information for the Aztec 600...

By pauljay

on 23 October, 2018 - 8:18 am

Hi, I need to read the analog input 2. Register 1 = byte 0 and byte 1 Register 2 = byte 2...

By pauljay

on 23 October, 2018 - 8:00 am

Hello, What is negative register? I'm working with RVG200 (ABB recorder) and it doesn't have...

By koen_verschueren

on 19 October, 2018 - 2:31 am

Yes you can but you need to filter the correct bytes on the receiving end. If you need byte 1 to...

By David_2

on 18 October, 2018 - 4:27 pm

Yes, you can use Function Code (FC) 03 to read multiple Holding Registers. The format of the FC...

By pauljay

on 17 October, 2018 - 4:36 am

Hi, I have additional questions about Modbus registers. I just want to ask. If you're using...

HRSG Burners High Spread

Posted by AAkhan

on 23 October, 2018 - 10:13 am

HRSG burners high spread on partial load (4 out of 8 burners in operation)

9
replies

DP to Flow Calculation

Posted by Bob on 9 September, 2004 - 12:31 pm

Does anyone have the calculation to convert a differential pressure transmitter to flow?

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By Donald J. Jenkinson on 23 October, 2018 - 8:23 am

This chart says a lot. For example that these dP devices should not be used if you desire to...

Popular Brands: DCS, Safety System, and Cyber-Security System in Your Region

Posted by instrument_irshad

on 23 October, 2018 - 3:41 am

Collecting Information popular brands in Industrial Automation to get a general insight on regional based popularity of brands used. Mostly interested in the Asia-Pacific area.

Pressure Transmitter Output Negative 4-20

Posted by Mrdouble

on 23 October, 2018 - 12:10 am

New and old pressure transmitter 4-20 ma output is negative

2
replies

GE Mark V Secondary Gas Valve Auto Calibrate Issues

Posted by RJSolo

on 21 October, 2018 - 8:48 pm

Unable to get Secondary Gas Valve to auto calibrate

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By RJSolo

on 22 October, 2018 - 9:51 pm

I appreciate the quick feedback. I try to research the best I can prior to posting. The MarkV...

By CSA

on 22 October, 2018 - 3:02 pm

If only ... we always received such detailed descriptions of precisely what troubleshooting was...

5
replies

MKVIE UCCC Not Booting

Posted by Chemsouhd

on 15 October, 2018 - 7:26 am

MKVIE UCCC Doesn't boot

New Replies:

By ME42

on 22 October, 2018 - 4:59 pm

ChemSouhd, Did you ever get this issue resolved?...

By demigrog2

on 17 October, 2018 - 10:51 am

There really isn't any configuration for a Mark VIe that isn't stored on the flash card; if the...

By Chemsouhd

on 17 October, 2018 - 3:45 am

Thanks guys, However temporary I prepared another controller (spare). I used the older Flash...

By ME42

on 16 October, 2018 - 2:59 pm

Definitely sounds like you have to re-flash the controller. See Demigrog's comments. Another...

By demigrog2

on 16 October, 2018 - 11:09 am

There is information on serial cables and COM settings in GEH-6808. But if you've got a UCCC, its...

3
replies

Difference Between I/O Cards

Posted by hamel ameur on 14 October, 2018 - 12:41 pm

Need to know the difference between two types of cards.

New Replies:

By ME42

on 22 October, 2018 - 4:58 pm

Don't read too much into the last characters. That is a GE internal thing. Long story short, they...

By CSA

on 19 October, 2018 - 5:09 pm

As I wrote, I was working on very little sleep yesterday (it's that time of year again--outage...

By CSA

on 18 October, 2018 - 4:56 pm

>Is there a difference between these two type of cards: >DS200TCCAG1BAA and DS200TCCAG1AJB? ...

1
reply

LVDT Failures on Splitter Valve Frame-6 Machine

Posted by thsaji

on 22 October, 2018 - 1:03 am

Facing frequent failure of LVDT's on Frame-6 splitter valves

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By CSA

on 22 October, 2018 - 11:13 am

Hmmm.... Several things come to mind, the first of which is: Are you using the proper LVDTs rated...

2
replies

Bubbler for level indication

Posted by SMF

on 21 October, 2018 - 3:11 pm

Working on a bubbler system that is indicating out of range and has a negative offset.

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By David_2

on 22 October, 2018 - 10:35 am

In the first 10 google hits a spec sheet for IDP20 did not appear. What is an IDP 20? A DP or...

By d on 22 October, 2018 - 4:39 am

If you are dealing with a vented tank, it could be the off-set needed to bring the Xmtr reading...

5
replies

High Frequency Transformer in Electrostatic Precipitator

Posted by rab1 on 30 September, 2018 - 1:48 am

Using high frequency transformer in a electrostatic precipitator (ESP) for coal bagasse boiler

New Replies:

By CastletLtd

on 22 October, 2018 - 6:05 am

Please send me your email address. I have some document which might help you to understand better. ...

By sanji66

on 17 October, 2018 - 5:50 am

To send the frequency detection at longer ranges the industrial grade Wireless frequency meter,...

Using Amtech to Model a Switchboard

Posted by Posty58

on 22 October, 2018 - 12:11 am

Amtech question on modelling.

5
replies

Drum Level Fluctuation Due to Rain

Posted by contacthemu

on 18 October, 2018 - 7:09 am

Drum level transmitters reading changes due to rain

New Replies:

By d on 20 October, 2018 - 12:07 pm

After the rain disturbance, how long does it take for the signal/level to settle down?...

By contacthemu

on 20 October, 2018 - 7:39 am

> do you have sight glasses in place? NO > are you using wet or dry legs? WET LEG...

By W.L. Mostia on 18 October, 2018 - 2:02 pm

Without further information, there are three typical causes of fluctuating signals during a rain...

By Borrellimd on 18 October, 2018 - 11:52 am

Is it possible that the sensing lines are cooling (or changing temperature) due to the rain? That...

By d on 18 October, 2018 - 8:48 am

do you have sight glasses in place? are you using wet or dry legs?...

1
reply

Causes of Reverse Power in Generators

Posted by mohsin on 20 October, 2018 - 3:19 am

What are the causes or reverse power in generators?

New Replies:

By CSA

on 20 October, 2018 - 11:56 am

mohsin, - Motors convert amperes into torque. - Motors get their amperes from generators. ...

CP1430 Wincc Connection

Posted by taheri_az

on 20 October, 2018 - 5:28 am

Connecting CP1430 TF transport connection to Wincc using Ethernet

2
replies

Questions About SIL 3 System Requirements

Posted by kullboys

on 19 October, 2018 - 3:51 am

What are the requirements for SIL 3 system?

New Replies:

By GaryLaw

on 19 October, 2018 - 1:20 pm

Just because hardware (or software) is "suitable for use" in SIL3 does not automatically...

By demigrog2

on 19 October, 2018 - 12:54 pm

As a CSE I know put it, a lot of people try to "buy" SIL systems. It can't be done. The...

1
reply

Horsepower for Impulse Water Turbine

Posted by Hector Lopez on 13 October, 2018 - 1:08 pm

Need to know hp of an impulse water turbine I'm making.

New Replies:

By d on 19 October, 2018 - 11:05 am

From an old fluid mechanics text: Power =Flow * Density * (Jet Vel-BladeTip Vel) [1-Cos(BladeTip...

1
reply

What is the procedure to replace VTUR card of Mark VI

Posted by jhon123

on 17 October, 2018 - 4:59 am

What is the procedure to replace VTUR card of Mark VI

New Replies:

By CSA

on 18 October, 2018 - 3:20 pm

I was hoping MIKEVI would respond to this. I recommend the unit be shut down; at rest is best,...

12
replies

TwinCAT 3 Error When Switched to Run Mode.

Posted by IngSAgius89

on 28 January, 2015 - 9:36 am

TwinCAT 3 error when switched to Run Mode.

New Replies:

By cobwebcraig

on 18 October, 2018 - 4:38 am

elevated command prompt run the following :- bcdedit /set UseLegacyApicMode yes bcdedit /set...

7
replies

Does a control valve always needs output signal from positioner?

Posted by Assylbek

on 15 October, 2018 - 4:16 am

Whether to install or not additional signal from positioner.

New Replies:

By Assylbek

on 18 October, 2018 - 1:44 am

I'm sorry if my question was unclear. The question is: usage of feedback from valve to DCS. ...

By dwpatterson

on 17 October, 2018 - 3:21 am

Your question was unclear if it was about using positioners on control valves or using position...

By Assylbek

on 17 October, 2018 - 2:04 am

Thank you for your reply! As I wrote in previous reply I calculated my costs as: - additional...

By Assylbek

on 17 October, 2018 - 1:57 am

Thank you very much for your reply! Yes, we use valves with positioners (or actuator has a...

By d on 16 October, 2018 - 2:57 pm

Valve position monitoring is only used in rare cases. Use of a "positioner" is another...

By Bob Peterson on 16 October, 2018 - 2:13 pm

These days the cost for feedback is relatively inexpensive and the benefits probably outweigh the...

By dwpatterson

on 16 October, 2018 - 3:49 am

To use positioners or not will depend on the type, size and service of your control valves and the...

Profibus Connection Between ALP111 and MICROMASTER420

Posted by masoodbeheshti on 17 October, 2018 - 5:35 pm

Want to start and stop the motor by Profibus communication from ALP111 yokogawa card to MICROMASTER420 siemens

9
replies

Solution for Hole Made on an EX "d" JB

Posted by instrument_irshad

on 11 October, 2018 - 6:57 am

How to repair a hole on an EX "d" certified JB for nameplate

New Replies:

By d on 16 October, 2018 - 4:19 pm

Remember, in engineering opinions lead to high risk designs, most advice here comes from experience...

1
reply

Clutch Disengaging Too Early During Startup

Posted by hem_dipu

on 16 October, 2018 - 10:54 am

Jaw clutch disengaging before reaching crank speed

New Replies:

By CSA

on 16 October, 2018 - 3:16 pm

hem_dipu, If the torque converter has a solenoid for spoiling have you checked that it's working...

3
replies

Factory Acceptance Test of MARK VIe

Posted by YZ on 1 October, 2018 - 5:44 am

I want to acquire information regarding FAT of MARK VIe system

New Replies:

By YZ on 16 October, 2018 - 5:47 am

Thanks for the valuable information. Can anybody provide any FAT reference of a GE steam turbine...

1
reply

VSD Sizing

Posted by Posty58 on 15 October, 2018 - 6:07 am

Sizing of VSD to allow VSD cable to be sized.

New Replies:

By FATIH TURAN on 16 October, 2018 - 3:43 am

Approximations might be dangerous due to the fact that VSD output waveform is not sinusoidal and...

5
replies

Barriers for Pressure Sensors, Temperature Sensors, and Solenoids.

Posted by Shailesh09

on 17 February, 2017 - 2:18 am

Requirement of barriers in control panel (safe area) for instruments (sensors & solenoids) which are in gas group IIA/IIB. (application compressor)

New Replies:

By klimbo12

on 15 October, 2018 - 6:10 pm

I get the impression you need a Hazop Study to determine the best solution....

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