Gantner

The Teleport can connect to the Gantner Q.reader logger.

Note

Gantner will send a quote to the asset owner for implementing configuration energy trader (off-taker) by Open VPN/ Modbus TCP, if this is not yet available on the asset

Supported properties

• generatedEnergy
• activePower
• reactivePower
• powerFactor
• activePowerLimit
• activePowerLimit.percentage

Modbus TCP over ethernet (recommended)

1. Connect an ethernet cable between the router and the Gantner Q.reader logger, as well as between the router and the ETH1 port of the Teleport. Please navigate to our appendix for more instructions on how to integrate with a router.
2. Gantner has to configure their device with the Modbus protocol. Please contact Withthegrid, so we can coordinate this with Gantner.

Modbus RTU over RS-485

1. Connect the serial cable between the serial port of the Teleport and the serial port of the Gantner Q.reader logger.
2. Gantner has to configure their device with the Modbus protocol. Please contact Withthegrid, so we can coordinate this with Gantner.

Modbus protocol

The Modbus protocol for the Gantner Q.reader logger is specified in the table below. The Teleport supports both big-endian and mid-little endian byte order. All registers are floating-points as described in IEEE 754.

Item	Register address	Size	Type	Unit	R/W	note
Active power limit	12288	2	Float32	%	R/W	As a percentage of the nominal active power.
Watchdog	12291	2	Float32		R/W	Written periodically by the Teleport1. When not written for a certain amount of time, the Gantner Q.reader will revert to a predefined active power limit.
Active power	12300	2	Float32	W	R
Nominal active power	12302	2	Float32	W	R
Generated energy	12304	2	Float32	Wh	R
Available active power	12306	2	Float32	W	R
Reactive power2	12308	2	Float32	var	R	Reactive power, following our sign convention.
Power factor2	12310	2	Float32		R	Power factor, following our sign convention.
Irradiance3	12500	2	Float32	W/m²	R	Irradiance, accumulated in case of multiple irradiance sensors.
Wind speed3	12502	2	Float32	m/s	R	Wind speed, accumulated in case of multiple wind speed sensors.
Ambient temperature3	12510	2	Float32	°C	R	Air temperature of the surrounding environment.
Solar module temperature3	12512	2	Float32	°C	R	Temperature of the solar module, e.g. solar panels or cells.
Irradiance measurement 13	12520	2	Float32	W/m²	R
Irradiance measurement 23	12522	2	Float32	W/m²	R

Footnotes

1. The watchdog register is written with an increasing value at least every 15 seconds. If the value reaches or exceeds 2¹⁶-1, it will roll-over to 0. ↩

2. Optional items. If this data is not available, the Modbus registers for this property should contain 0xffff. ↩ ↩²

3. Optional items, only used when environmental data is available. If this data is available, the Teleport will use a secondary and tertiary Modbus TCP connection to the Gantner Q.reader to retrieve this data. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶