S0 pulse counter with SNMP & Modbus/TCP

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).

Issue description:

Connecting electricity, gas or water meters to the Ethernet and reading values over the SNMP or Modbus/TCP protocols.

• Electricity consumption monitoring for datacenters

• S0 to SNMP conversion

• S0 to Modbus/TCP conversion (most SCADA systems)

• Energy consumption monitoring

• Digital pulse counter

Solutions

• Data center energy monitoring

• S0 to SNMP conversion

• Support for most SCADA systems

• Digital pulse counter

Benefits

• For usage with existing electricity meters with S0 pulse gen

erator

• Compatible with ell S0 electricity/gas/water meters

• Software HWg-PDMS converts pulses to [kWh] / [m3] / [l] and analyse consumption periodicaly

• More models of Damocles with 4, 12 or 24 DI available

Technical description

• 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