Emerson Exchange 365

DCS DeltaV , CHARM Module

Hi Dear 

Please Help me about DCS DeltaV  CHARm system.

can we used CHARM module for loop control.?

which project was used CHARM system?

thanks

Jamshid Ferdosi

jamshid ferdosi

• 16 Jun 2021 4:38 AM
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9 Replies

• MC_Chow

  

  • 16 Jun 2021 12:31 PM

  Yes, DeltaV Electronic Marshalling (CHARMS) can indeed be used for closed loop control as well as Safety Instrumented Systems (SIS) applications with SIS CHARMS. There are over 2.7 million CHARMS operating today and too many projects to list. It is proven technology .

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• MPHymel

  

  • 16 Jun 2021 2:13 PM

  Yes Jamshid, we use S series CHARM IO exclusively at our facility. Would hate to even think of going back to conventional IO.

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• MPHymel

  

  • 16 Jun 2021 2:51 PM

  In reply to jamshid ferdosi:

  Our redundancy extends to CIOC level. Power and networks are redundant to that point. If you needed redundancy down to the point level, then you could get creative and wire the same transmitter to two different CHARM on two different CIOC. Personally, I'd suggest a redundant instrument if I needed the availability. We use a different safety system, so our applications are typically control.

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• MPHymel

  

  • 16 Jun 2021 4:19 PM

  In reply to jamshid ferdosi:

  That may depend on your application. For those few interlocks implemented on our DCS, we use DI points used as interlocks and our PCSD classes are set up to capture "first outs". Our modules execute once a second. For our applications this is fast enough. The PHV event log offers fast enough event recording to suit our needs. For our safety systems, we do make use of SOE recording for millisecond resolution of events. Hope this helps.

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• Andre Dicaire

  

  • 16 Jun 2021 8:48 PM

  In reply to MPHymel:

  The CHARM IO CARD extends redundancy down the CHARM carriers and into the CHARMS themselves. Each CHARM has redundant communications and redundant power provided through the Carriers. Each CHARM has internal diagnostics that will indicate a fault. The field side circuitry is simplex, but redundancy starts in the CHARM and carries up to and beyond the CIOC.
  
  The SOE card time stamps a change of state at the Channel of the card and the cards are synchronized to a common Time server to ensure events are accurately recorded to the milli second. A CHARM does not time stamp its change of state. The CHARM signal must be read by a control Module at which time an event message or alarm can be generated based on the DI CHARM state change.

  Andre Dicaire

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• LaurentB

  

  • 19 Jun 2021 9:17 AM

  In reply to jamshid ferdosi:

  Csls are attached SZ controller

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• YogBhagwat

  

  • 19 Jun 2021 9:21 AM

  In reply to jamshid ferdosi:

  You will need SZ Controller, CSLS if you want to connect Safety CHARMs.

  CSLS can talk to SZ only. SQ / SX cannot connect to CSLS

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• LaurentB

  

  • 19 Jun 2021 6:43 PM

  In reply to jamshid ferdosi:

  Yes you can up to 4 CIOC per SZ

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• LaurentB

  

  • 19 Jun 2021 6:43 PM

  In reply to jamshid ferdosi:

  Yes you can up to 4 CIOC per SZ

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