Instruction Manual

mxCONTROL Type 8620
Page 43
Estimation for a blank SD card, formatted with FAT16 file system:
Required SD card size [MByte]
0,9
][MBytememory free Required
≥
, resulting in:
Free SD card memory [MByte]
][MBytesize cardSD0,9 ∗=
Estimation, how many days the SD card will suffice:
Days =
()
SampleDataLogsPerDay
HeaderDataNOC
MByte 1
kByte 1024
MByte) 1[MByte]memorycardSDFree
∗
∗−∗−
⎟
⎠
⎞
⎜
⎝
⎛
Example:
An empty 64MByte SD card, formatted with the FAT16 file system,
with a free SD card memory of 0.9
*
64 MByte can receive the logging of process data of
4 normal modules (SampleData = 0.3 kB, HeaderData = 2.5 kB) at an estimated number
of 1000 NOC (Number Of Changes = special events):
- with disabled event triggered datalog function:
- approx. 21 days with TSample = 10 sec or
- approx. 3.5 years with TSample = 600 sec = 10 min
- with enabled event triggered datalog function and estimated number of 1000 NOE (Number Of
trigger Events per day – corresponds approx. with switching on and off each of the 4 module outputs
5 times per hour):
- approx. 19 days with TSample = 10 sec or
- approx. 5 months with TSample = 600 sec = 10 min
11.3.2 Start of Data Logging (enabling)
To enable the Data Logging function proceed as stated below.
An example for the data logging layout can be seen in appendix
21.6.
→ Insert an SD card (formatted with FAT16) with enough free memory into the
SD card slot under the hinged lid
→ Scroll in the main menu to the menu item “Data Logging” (via “arrow” keys),
press key “ENTER”.
→ Enter the operator or specialist password (via keys „+“ and „<-“)
→ Select „Enable“ of Data Logging, press key "SELEC"
The Data Logging function is activated immediately!
The active function is indicated by a symbol top left on the display.
It is now possible to select another menu item (except Up-/Download)
because the Data Logging function is running in the background until
being disabled.