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1. General
After running, EM-481 starts execution of the program for logic of action, if it was placed earlier in the built-in
memory. If there is no program in the built-in memory, EM-481 searches for and checks the task files placed in the
folder "TASKS" on the memory card, provided the card is formatted in the FAT or FAT32 format. The correctly
discovered files are read in the built-in memory and form the logic program of actions. Such a reading runs once
after startup or after installing a new memory card, only if the built-in memory does not contain the programs.
To clean the internal memory you should:
1) Enter EM-481 parameter setting via WEB interface (see Manual, it. 5.3.3);
2) Go to the tab "Files";
3) Press the button "Clear internal memory of tasks";
4) If the result of the reading the program is not displayed immediately in the tab "Files", refresh the page a few
seconds later.
Note: The program in the internal memory is deleted when updating the embedded software. If the
memory card with the task files remains installed in the EM-481, the program will automatically read again
after the update.
The tab "Files" indicates the result of reading the folder "TASKS", including the number of discovered and read
files. If during reading and verifying the program errors were detected, then it indicates the type of error, file and line
number of the file error. If the program consisted of several files in the folder "TASKS", then the internal memory will
read all files except those in which errors are detected. Therefore, during error correction you should compare the
number of discovered and read files and if some were read, to clear again the internal memory to re-read the
program.
Files can have arbitrary names and extensions and placed in subfolders of the folder "TASKS". Files placed
directly in the folder TASKS, allow you to use MODBUS ID default in the text, equal to MODBUS ID of the product
EM-481. Files placed in subfolders in the folder "TASKS" with names from "1" to "247", allow to use the text
MODBUS ID default name of the subfolder. Therefore, if the program logic is divided into tasks so that each is
associated with its connected device, it is recommended that files relating only to EM-481, to be placed in the folder
"TASKS" and files related to primarily the other device, to be put in a subfolder with the name of the MODBUS ID of
this device. This allows you to change the list of managed devices by copying and renaming the subfolders, and
create universal and portable files of the tasks.
2. Files of the tasks
File of tasks describes repeated after a specified time interval the set of actions for gathering, processing and
comparing the data and special actions after fulfillment of the preset conditions according to the processing results.
The task file is divided into sections which in turn are divided into lines.
The section is part of the file that starts with "!" and the name of the section written in a row.
Correct example:
!META
* UPDATE 60
!PARAMS
...
If the section allows you to refer the lines in it, then all the lines of the section are numbered, otherwise instead of
a number of the line will be put the sign "*". The format of the line is different in each section. The number and order
of sections does not matter (sections can be interrupted and then be continued after one or more sections), if two
rules are fulfilled:
1) If a section with numbered lines is found for the first time, the numbering starts with 0, otherwise, numbering
continues from the previous section of the same name.
EM-481
28
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Appendix C
(recommended)
Operation logic programming
Incorrect example:
META
* UPDATE 60
! PARAMS
...
NOVATEK-ELECTRO
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