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DVC 6030- Configuration not saving and output is always at maximum pressure

A DVC 6030 is wired according to schematic with 250 ohm resistance, it communicates with 475 HART communicator but when I try to save the configuration to Internal Flash the HART application aborts and return to main screen.

Moreover, the output of positioner is not responding to input current. It gives maximum pressure(60 psi) to the actuator no matter how much input current is provided, this has created problem in calibration as well.
Need help to diagnose the problem(s)

6 Replies

  • Hi Aleem,

    The DVC6030 is an AO type of device which means that a 250 ohm resistor is not used in the wiring.  This can disrupt communications to the instrument..

      1) The instrument may be out of service meaning that it won't respond to any changes in the input signal. This feature is in place so that nobody remotely change valve position while a technition is physically working on it. By putting the instrument back in service - it will respond.

    2) There may be a physical issue with the instrument - possibly elastomers that have hardened and failed causing internal leakage driving instrument to respond this way.

    3) It's also possible that the communications to the instrument are being interfered with due to the extra resistance in the loop (250 ohm resistor).

    My suggestions:

    1) Remove the resitor and try the excersize again, see iif this resolves the issue.

    2) If the isses aren't resolved - contact your local Emerson representative and discuss with them for resolution.  If you don't know who they are, follow this link and it will provide the contact info for you: www2.emersonprocess.com/.../contacts.aspx

    Lorin Miller

  • Is this DVC6030 SIS? Are you proving DO (24VDC) to operate?
    If so then DVC is in Multidrop mode. If so will require LC340 and change in output is not possible as DVC is working as transmitter mode when using with DO signal. It will have two positions; full pneumatic output or minimum pneumatic output.
     
    Aleem, could you please advise, your locations so that local help can be rendered or please provide your phone number so that someone can reach you.  
     
    Regards
     
    Riyaz Ali, CFSP │Director, Middle East & Africa Instruments Business Unit │ Fisher
    Emerson Process Management
    P. O. Box 17033│ Dubai │UAE
    T +9714 8118283 │ F +9714 8865465 │ M +971 55 4028059 │ Riyaz.Ali@Emerson.com
    www.FIELDVUE.com
     
    FIELDVUE Instruments.  Celebrating 1,500,000 units sold worldwide
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    From: LorinMiller [mailto:bounce-LorinMiller@community.emerson.com]
    Sent: 07 March 2014 22:00
    To: DVC@community.emerson.com
    Subject: RE: [EE365 Valve Controllers & Positioners Track] DVC 6030- Configuration not saving and output is always at maximum pressure
     

    Hi Aleem,

    The DVC6030 is an AO type of device which means that a 250 ohm resistor is not used in the wiring.  This can disrupt communications to the instrument..

      1) The instrument may be out of service meaning that it won't respond to any changes in the input signal. This feature is in place so that nobody remotely change valve position while a technition is physically working on it. By putting the instrument back in service - it will respond.

    2) There may be a physical issue with the instrument - possibly elastomers that have hardened and failed causing internal leakage driving instrument to respond this way.

    3) It's also possible that the communications to the instrument are being interfered with due to the extra resistance in the loop (250 ohm resistor).

    My suggestions:

    1) Remove the resitor and try the excersize again, see iif this resolves the issue.

    2) If the isses aren't resolved - contact your local Emerson representative and discuss with them for resolution.  If you don't know who they are, follow this link and it will provide the contact info for you: www2.emersonprocess.com/.../contacts.aspx

    Lorin Miller

  • In reply to LorinMiller:

    Hi LorinMiller,

    Thanks for your prompt response but as I read the manual for 475 communicator it was suggested to use 250 ohm resistor in loop for it to communicate

    and thats true because without it communicator prompts for "No Device Connected" in online mode. Moreover, The communicator reads correctly the Analog Input (4 - 20 mA) but the positioner doesnot change output to whatever the input is.

    2. I will have to check on the elastomers.

    3. The instrument was checked at "In Service" and "Out of Service" modes but no change in behavior. It does not respond to Auto Calibration as well

    4. I did all of this experiment at a spare DVC6030 and it all went well, it communicated, it saved configuration, it was calibrated( Auto and Manual Both).

  • In reply to Riyaz Ali:

    Hi Riyaz,

    I am pretty sure It is not DVC6030 SIS and we are providing 4-20 mA as Analog Input. Moreover, The DIP switch is in Point - Point Loop mode in the PWB assembly.

    It would be helpful if you guide me to any other way of checking if its in multidrop mode.
    Regards

    Aleem Ullah

    Instrument Engineer,
    Agritech Ltd.

    Iskanderabad, Mianwali, Pakistan

    +92 331 4014840

  • Thanks Aleem,
    Your region is served by our AP office and will  have S P Goh to assign someone from local office in Pakistan to assist you.
    Generally in ValveLink there is clear indication, if DVC is operating in Pt-Pt mode or Multidrop mode. There is  icon in right hand bottom corner of ValveLink screen.
     
    Regards
     
    Riyaz Ali,
     
    FIELDVUE Instruments.  Celebrating 1,500,000 units sold worldwide
    SocialMediaIcon_Facebook_96ppi  LinkedIn_IN_Icon_35px  SocialMediaIcon_Twitter_96ppi  youtube_32x32
    The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.
     
     
    From: Aleem Ullah [mailto:bounce-AUllah@community.emerson.com]
    Sent: 08 March 2014 02:33
    To: DVC@community.emerson.com
    Subject: RE: [EE365 Valve Controllers & Positioners Track] DVC 6030- Configuration not saving and output is always at maximum pressure
     

    Hi Riyaz,

    I am pretty sure It is not DVC6030 SIS and we are providing 4-20 mA as Analog Input. Moreover, The DIP switch is in Point - Point Loop mode in the PWB assembly.

    It would be helpful if you guide me to any other way of checking if its in multidrop mode.
    Regards

    Aleem Ullah

    Instrument Engineer,
    Agritech Ltd.

    Iskanderabad, Mianwali, Pakistan

    +92 331 4014840

  • In reply to Riyaz Ali:

    Hi Aleem,

    Since you mentioned the issue was resolved with a spare DVC6030, it appears that you might have a unit that needs further investigation and the issue is not related to the host, hook-ups or installation. Our Emerson Paskistan local business partner's contact info is given below. If the unit is still within the warranty period, we can have the unit repair/replaced through Technobiz.

    Technobiz ( Private) Limited

    213-A, 2nd Floor, Continental Trade Centre

    G/6, Scheme-5, Block - 8,Main Clifton Road,

    Karachi, Pakistan

    Tel: +92 21 35302961-62

    Contact: tariq.ashfaq@technobizz.com

    Regards,

    SP Goh