NetMan 204


The purpose of this plugin is to collect data from NetMan 204 UPS systems.


The NetMan 204 is a device that allows UPS management through a LAN (Local Area Network). This plugin collects from the Netman 204 interface card. Meter data will be collected to the storage table. By default, it will collect data every 5 minutes, but can collect at a minimum rate of about 0.3 seconds via TCP. The plugin will make 1 attempt (by default) to read the meter. This plugin relies on the Modbus Ardexa plugin. The following data will be collected:

Variable                    Units
Input Voltage 1             V
Input Voltage 2             V
Input Voltage 3             V
Input Current 1             A
Input Current 2             A
Input Current 3             A
Input Freq                  Hz
AC Voltage 1                V
AC Voltage 2                V
AC Voltage 3                V
AC Current 1                A
AC Current 2                A
AC Current 3                A
Load Phase 1                %
Load Phase 2                %
Load Phase 3                %
Power Phase 1               W
Power Phase 2               W 
Power Phase 3               W
Grid Freq                   Hz
Battery Voltage             V
Battery Current             A
Battery Capacity            %
Total Energy                Wh
UPS Temperature             °C
Sensor 1 Temp               °C
Sensor 2 Temp               °C

Test in Progress
Shutdown Active
Battery Charged
Battery Charging
Bypass Bad
Normal Ops
On bypass
Battery low
Battery working
UPS locked
Output powered
Input Mains present
Alarm temperature
Alarm overload
UPS failure


Arguments are as follows:

  • endpoint. This is either a serial device like /dev/ttyS0 or an IP or DNS like

  • bus_addresses. A Modbus address in the range 2-255. This can be a hyphenated list like 3-10 or a list like 2,5,7,9

  • --port. This is an optional parameter used in an Ethernet gateway, and is the TCP port used for the gateway. Default is 502

  • --attempts. This is an optional parameter, and determines how many times to times to attempt to read an inverter value. Default is 1

  • --delay. This is the delay in seconds between inverter send and receive commands, AND if attempts > 1. Fractions like 0.3 can be used. Default is 0.05

  • --stop_on_any_command_fail. If this is specified, then any Modbus commands that fail will stop all further queries for all bus addresses and attempts.

  • --serial_lock. If this is set, the program can only be run one at a time (so as not to overload a Modbus device). If the device being queried is a serial device, this will automatically be set to "on". For IP addresses it is optional.

  • --sampling_rate. If this is defined, and the sampling rate is greater than 1, then all values listed above will be collected as an average. In other words; it will take a sample at the nominated frequency. After X samples defined by sampling_rate, a record will be written and sent to the cloud.

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