02 January 2013
This development enables a reduction in the load on the PLC helping to improve machine performance and ensuring complete traceability of production for safe and secure operation.The HMI’s built-in RAM can store up to 2,000 data points, and logged data can be viewed either in a historical trend graph or in a historical data display list. In addition, the HMIs provide options for USB ports and a CF/SD card slot, enabling data to be easy archived to, or transferred via, USB memory sticks or CF/SD cards.As well as logging data, the HMIs can also transmit data from connected devices to a higher level SQL database server located on a PC via the optional MES interface function. The MES interface function provides direct communication between the HMI and the SQL database, removing the need for an intermediate layer of PC hardware.
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