SL - Data

S-LOG - Data Logger

SL-Data English Tech. Manual PDF format.

SL-Data is a product capable to acquire analog data, supplied by the field, and to save them on a removable memory card , like the SD (Secure Digital) and MMC (Multi Media Card) types.
This product is the result of numerous experiences, collected in many years by grifo®, during the development of Data Logger applications. The equipment acquire and save different analog signal in a simple, reliable and cheap manner. Moreover it allows to examine and/or process the saved information, later and in a different place.

The logged data are saved on the memory cards managed by S-LOG, that are the SD and MMC, with FAT16 format.
The logged data can be moved to a PC through a simple extraction of the memory card and a following insertion on a PC provided of a standard multicards interface. The data are availbale under file/s with ASCII format and they are organized in order to be opened with EXCEL spread sheet. Then these data can be saved in different files, or they can be examined, processed, printed, arranged, registered, displayed on graphs, etc. according with user requirements.

The SL-Data is composed by a group of hardware, firmware and software. This division allow the customers to select two different working modalities:
A) Use the package directly, as it has been supplied, by taking advantage of the provided configurations in order to satisfy the application requirements.
B) Modify the program Source in order to change, or add, some new required functionalities.

The operative features, already available or to be added, of the SL-Data are briefly described below.

The firmware and the software normally provided with SL-Data acquire and save the analog inputs available on GAB H844, coupled with a selected Mini Module. The supplied program, even in source format widely remarked, includes all the necessary Procedures and Data Structures and allows the user to develop his firmware and to satisfy his specific requirements. In this manner the SL-Data considerably reduces the development time of data logger applications.

A comfortable configuration mode let the user arrange the SL-Data for the application to develop. As an example, it defines the type of the connected analog signals, the acquisition time and mode, the features of the physic values acquired (engineering format), etc. Normally the configuration mode is used only one time before the installation of the complete system.

One of the most important features of SL-Data is that it is a ready to use product: the user is not forced to know the selected and used hardware. Thanks to the Utility programs and the sources provided with the product, it is possible to set up, test and use the data logger in few minutes.

The most important features of SL-Data are summarized in the following points. In order to simplify the description we define:
- Acquisition Hw -> system dedicated to field signals connection (usually GAB Hxxx + Mini Module).
- Saving Hw -> system dedicated to data saving (S-LOG: for details please proper documentation).

• Acquisition of the Analog Inputs available on acquisition hw.
• Analog Inputs configurable among different Types: two are Voltage inputs (0÷Vmax value, 0÷Vmax value*4) and two are Current inputs (0÷20 mA, 4÷20 mA).
• Analog inputs can be Filtered or not by firmware, and enabled in the acquisition hw configuration.
• Gain Factor application on the analog inputs.
• Analog inputs are converted in Engineering Unit.
• Engineering unit for analog inputs defined under configuration with Begin Scale and End Scale values.
• Values in engineering units are saved on memory cards.
• Automatic Format of the values in engineering unit, in order to provide always the maximum number of Significant Digits.
• Data saved on Memory Card with SD or MMC type, up to GBytes.
• FAT16 format for memory cards.
• Memory card completely managed by S-LOG.
• Data on memory card are organized on single or different ASCII Files, compatible with electronic spreadsheet as EXCEL.
• Possibility to add Label, Prefix, Suffix to saved data, with the saving hw configuration.
• Label, Prefix and Suffix can be widely composed and include also Time Indication (current date and time).
• The memory cards and the saved data can be managed by any PC provided of proper multicards interface.
• Comfortable configuration modes either for acquisition hw and saving hw.
• Configurations are mantained in backed memories (EEPROM) with specific algorithms and reliability controls.
• Connection between acquisition hw and saving hw can be performed either with Asynchronous RS 232 or Synchronous I2C BUS communication.
• Serial Communication Line can be selected under configurations.
• Easily define of RS 232 Physic Protocol for asynchronous communication (Baud Rate, Stop Bit, Parity, etc.).
• The not used communication line of the acquisition hw (Asynchronous RS 232 or Synchronous I2C BUS) remain Free for the connection to different external systems.
• Acquisition Time can be defined under configuration among 18 standard values (from 1 second to 1 day), or alternatively with a time inserted by user.
• Time control of the acquisition hardware based on a Periodic Interrupt, with 10 msec resolution.
• Check of configuration Validity and signalling of possible errors.
• Saving hw Functionality is Cheked by acquisition hw and possible anomalies are signalized.
• Firmware source developed with Modular Procedures dedicated to any section of the acquisition hw (EEPROM, A/D, Buffered Inputs, Buffered Outputs, Serial Communication, Timing, etc.).
• Firmware and software support double language: Italian and English.
• Wide Documentation and rich list of Examples both in Source and Executable format.
• No License nor additional costs. The user is free to develop all the applications that he requires.

For further information please refer to proper SL-Data user's manual.

- At least one SL-Data hardware device.
- A power supply source for the selected hardware device.
- A PC provided of one RS 232 asynchronous serial line (COMx) and one multicards interface.
- A memory card up to 2 GBytes.
- Serial communication cables.

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