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HWg-CS33: S0 pulse counter with SNMP & Modbus/TCP output

Case study on connecting electricity, gas or water meters to the Ethernet and reading values over the SNMP or Modbus/TCP protocols.
Pulse outputs from 3rd party meters (S0 interface) are connected to the Damocles Ethernet I/O unit. Each Digital Input on the Damocles unit features a 32-bit pulse counter. The value of this counter can be read out over the web using most M2M protocols (SNMP, XML, Modbus/TCP).

  • Works with any 3rd party energy meter with pulse output (S0)
  • S0 pulse output from the meter is connected to a digital input (DI). The Damocles unit works as a s0 pulse counter with Ethernet output.
  • M2M output: SNMP, Modbut/TCP, XML (HTTP)
  • Software: PDMS + XML overview to MS Excel
Applications
  • Electricity consumption monitoring for datacenters
  • S0 to SNMP conversion
  • S0 to Modbus/TCP conversion (most SCADA systems)
  • Energy consumption monitoring
  • Digital pulse counter
Benefits
  • Can be used with existing 3rd party energy meters
    (S0 pulse output required)
  • Compatible with any S0 electricity / gas / water meter
  • The HWg-PDMS software allows conversion of pulses to [kWh] / [m3] / [l] and consumption analysis within a defined time period.
  • Several Damocles models available, with 4, 12 or 24 Digital Inputs
Use any 3rd party energy meter with pulse output (S0) to convert energy to SNMP

Technical description

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  • The 3rd party energy meter must have a S0 pulse output.
  • The S0 output is connected to a Digital input of the Damocles unit.
    There are several models availale with 4, 12 or 24 Digital Inputs (DI). All Damocles units feature a has 32-bit digital counter on every DI.
  • The number of S0 pulses is directly proportional to the amount of consumed energy (e.g. 1000 pulses = 1 kWh). This ratio is specific for the particular 3rd party energy meter.
  • Pulse counters can be checked using the web (flash) interface of the Damocles unit.
  • Pulse counters for each DI (each energy meter) are available over the LAN through the following protocols:
    • SNMP
    • XML (over HTTP)
    • Modbus/TCP
  • The counters can be analyzed in the HWg-PDMS software.
    • PDMS collects data from all connected sensors.
    • In PDMS, pulses can be converted to energy (for example 1000 pulses = 1kWh)
    • PDMS can correctly handle device restarts and counter resets
    • PDMS can export energy consumption to MS Excel as a list of 5 or 15 minute differences

 

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Damocles WEB interface for DI counters

web interface of 32 bit counter

XML format of the S0 pulse counter

32 bit counter in XML

SNMP output of the S0 pulse counter

32 bit counter in SNMP (GetIf software)

Keywords

s0 pulse counter, s0 to ethernet, ethernet pulse counter, S0 to SNMP, S0 to Modbus-tcp, digital pulse counter, DI pulse count, snmp pulse counter, energy consumption monitoring, s0 electricity meter, water meter with S0 output

 

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