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Configuration/wiring of M-Series2 Serial Card

Hi,

I have 2 Serial Interface M-Series cards attached to DCS Controller on site. I have below concerns:

• Want to use as master device to collect data from other serial slave devices (not redundant configuration)
• I couldn't find configuration manuals and wiring
• Tried changing register numbers but unable to modify e.g Register numbers always start from 30001 series, I need 33072. Same for coils, holding registers. 

Appreciated your input on it. 

Let us build success,

Zohaib Jahan

• DCS
• Serial Communication
• MODBUS
• DeltaV

Zohaib Jahan

• 2 Dec 2022 10:27 PM
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2 Replies

• Scott Thompson

  

  • 5 Dec 2022 3:19 PM

  For M-Series wiring of serial cards go to Books On-Line, expand Hardware Installation, expand DeltaV M-series Hardware Installation and Reference, expand Interface Specifications, and select Serial Card, 2 Ports, RS232/RS485.  This will have the terminal definitions for all of the supported connection types.

  Configuration help can be found in Books On-line as well under Configuration, I/O Configuration , Serial Devices and the DeltaV system.

  The register numbers you see are defined by the PLC data type you are selecting and the PLC register offset.  Input register type sets a PLC base register address of 30001, to read starting at 33072 you would then need a PLC register offset of 3071 configured on the PLC tab of the dataset configuration.

  

  Similarly with Holding registers (start at 40001) and coils (start at 1).

  With the base Modbus driver you are limited to addresses no higher than 9999 relative to the PLC base register address.  There are other drivers available that will allow you to address higher offsets than 9999.

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• Zohaib Jahan

  

  • 7 Dec 2022 4:14 PM

  In reply to Scott Thompson:

  Thanks Scott.
  I'll try using Offset.

  Let us build success,

  Zohaib Jahan

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