EZTouchPLC
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Pausing Data Acquisition and Ejecting Card
Pause / Resume Data Collection Tag:
This is a discrete tag that can be controlled by user (e.g. through a Push Button) or
by PLC to enable or disable data acquisition. When the tag's value is 0, data
collection is enabled; and when it is 1, the collection is disabled or paused. Setting
the tag to 0 resumes the data collection.
Request for Safe Card Ejection Tag:
This is a discrete tag and can be controlled by user or PLC. The Tag is set by user
(say by a Pushbutton) or by PLC to indicate that the user would like to remove the
SD card for possibly reading it in a SD card reader. When Panel sees this tag as set,
all buffered data is written to the files, and files are closed for safe removal of the
card. Another discrete tag, Safe-to-Eject-Card is set to indicate that it is now safe to
remove the SD card without fear of file corruption. At the same time, the Request
tag is reset by the panel.
Safe to Eject Card Tag:
This is a discrete internal tag. The tag must not be mapped to PLC. The Panel would
set this tag when it is safe to remove the card. It is reset whenever it is unsafe to
remove the card.
It is highly recommended that you use Request-for-Safe-Card-
Ejection and Safe-to-Eject-Card tags for removing the card. If the card is removed
without safe indication, the data on the card may get corrupted due to open files.
Содержание EZTouch I/O Flex
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