SD Card and Trends

Use the Start Saving Trend to SD to record an entire or partial trend; and Stop Saving Trend to halt the recording process.

When the application writes this type of data to the SD card, it creates a file with the extension .utr in the Trends folder. Each time you start and stop saving the Trend, the application adds a new segment to the file.

Parameter Name	Purpose
Source Trend Number	Click on the drop-down arrow to select a Trend in the project.
Target SD .utr file	Link an operand to provide a file name. Note that you MUST provide a file name. If the linked register is empty, the Trend will not be recorded to the SD. This is where the .udt file will be stored on the SD card. You can select the folder, or provide the Folder number via register. Values point to folders as follows: 1=the main DT folder, 100=DT1, 101=DT2, 102=DT3, and 103=DT4.
Status Operand	This MI is a bitmap; a bit turns ON to indicate status. The MI is initialized when the function starts. Bit 1 – The SD card was formatted in an SD Tools version that is not compatible with the VisiLogic application in the PLC. or VisiLogic version is not compatible with the PLC OS. Check to see if you need to update versions. Bit 2 – The data in the SD is not compatible with the data in the Data Table Bit 3 .-.Data checksum error Bit 4 – Failed to open file Bit 5 - Failed to read from file Bit 6 - Failed to close file Bit 7 - In progress Bit 8 - No SD card found Bit 9 - SD error, check SI 66 for error message Bit 10 The file is not closed, but cannot be written to
In Progress	Turns ON when the function Start Saving begins working, and turns OFF when the Stop Saving Trend is activated.

Displaying the saved Trend

You can display Trend curves directly from a .utr file by using the HMI element Trend from SD.

Link SBs 117 and 118 with HMI buttons to enable users to jump between segments. Use the inverted contact of SB119 as a condition as shown below.

When you save a Trend to an SD card, each time you start and stop the save, another segment is added to the .utr file.
#	Description	Turns ON :	Turns OFF :	Reset by:
SB 116	SD Trends to SD: Set to Overwrite .utr	User application	User application	User
Use these to control the display of Trend segments on the HMI screen. Use the inverted contact of SB119 as a condition.
SB 117	SD Trends: Jump to next segment	User application	User application	User
SB 118	SD Trends: Jump to previous segment	User application	User application	User
SB 119	SD Trends: System busy - Draw Trend is gathering data	User application	User application	User