FAQ#095 – How long does a chain of digital sensors take to be read?
It mainly depends from the powering mode of the gauges (refer to FAQ#094 for the description of the powering modes). AN EXAMPLE WILL BETTER CLARIFY THE ANSWER. In a batch of 240 gauges, unless otherwise requested by the Customer, the addresses are settled from #001 up to #240. In a borehole is installed a chain of 30 […]
FAQ#092 – If I us a WR-LOG wireless system, when data will be available on the Gateway (SLOT TIME) and on my FTP?
WR-LOG system can send three type of data:– Nodes data file– Nodes health file– Compacted or Custom Compacted fileIn order to optimize the availability time, the Sampling Rate (SR) of each node must be inserted into the Gateway, so that Sisgeo STRONGLY SUGGEST to insert the sampling rates of each node into the Gateway.If the […]
FAQ#089 – Which is Gateway model to choose for WR LOG wireless system?
The available gateways for WR LOG system are: – 0LSWR868GW0 – 0LSWR915GW0 – 0LSWR923GW0 These models differ from the frequency utilized by the internal 2G/3G modem. In order to choose for the right gateway, please refer to the document to be downloaded. If more than one model is suggested for the installation Country, you have […]
FAQ#086 – How to solve the problem with dial-up connection under Windows in some languages version
When you create the dial-up remote connection to communicate with miniOMNIAlog, there could appear an error regarding the driver of the Standard Modem 56000bps used for the connection. This error appears only if you use certain versions of Windows in languages different from Italian and English. This problem could appear both configuring manually the connection […]
FAQ#083 – How does the TRIGGER function of OMNIAlog digital input work?
The TRIGGER function of the two digital inputs available on OMNIAlog datalogger is typically used with seismic station. In case of an event (earthquake), the seismic station is usually able to supply a certain tension on its output (typically 5Vdc). If this output is connected to the digital input of OMNIAlog, and OMNIAlog is conveniently […]
FAQ#082 – Is there any precaution to adopt for the number of measurements saved on the OMNIAlog / miniOMNIAlog memory?
OMNIAlog is equipped with a microSD 2GB memory. This memory allows to save a very high number of readings. For this reason, it is necessary to bear in mind what follows: Therefore SISGEO strongly suggests to periodically download data and, later, to delete them from OMNIAlog memory. This way it is guaranteed an efficient data download.
FAQ#080 – What dimensions has the .CSV file in columns that contains the measures acquired with OMNIAlog and miniOMNIAlog?
The dimensions of the measures file “in columns” downloaded with OMNIAlog and miniOMNIAlog vary according to the number of sensors acquired and the stored cycles of acquisition. The higher is the number of sensors acquired and the number of cycles of acquisition stored, bigger is the dimension of the file. It could be used the […]
FAQ#079 – Is it possible to send SMS in case of alarms with miniOMNIAlog?
Yes, if miniOMNIAlog is equipped with 2G (GSM/GPRS) modem. To do so, the user must have already configured the relative web pages.
FAQ#078 – Is it possible to send SMS in case of alarms with OMNIAlog?
Yes, if OMNIAlog is equipped with a 2G (GSM/GPRS) modem, connected through a serial cable to its RS232 port. OMNIAlog allows to set up alarm thresholds and the notification of these alarms could occur: – by SMS; – by email; – by FTP; – increasing the acquisition frequency; – managing a digital output (for example to manage […]
FAQ#076 – Why it is necessary add a termination resistor to the last digitized sensor of each RS-485 chain?
All SISGEO digitized instruments (IPIs, Tiltmeters, H-Level…) use the RS-485 serial communication protocol The RS485 protocol contemplate a termination resistor. The recommended chain connection is point-to-point (multidropped) nodes as a bus mode (line). Star, ring or multiply network connection are not recommended. SISGEO dataloggers has already a termination resistor assembled (typically 120Ω). On the opposite […]
FAQ#074 – Which kind of datalogger is necessary to read a SISGEO digital sensors?
The sensors are read connecting the end cable to a Modbus Master unit (i.e. OMNIAlog or miniOMNIAlog) with RS-485 interface (DCE, Half duplex, no Echo) able to manage communication with SISGEO Modbus RTU communication protocol. SISGEO’s communication protocol is available for the release upon request. The power [W] of power supply must be chosen according […]
FAQ#073 – Which is the maximum number of digitized sensors (RS-485, Modbus), the maximum number of chains and the maximum length of cable in a RS-485 network?
Last update: October 2021 All the SISGEO digitized sensors utilize a RS485 interface with Modbus protocol. 1.The maximum number of digitized sensors in a RS-485 network are 247 (theoretical) 2.The maximum number of digitized sensors chains that is possible to connect to Modbus master unit (as OMNIAlog or miniOMNIAlog) are 4. 3. About the maximum […]