User manual

C - 78 Magelis
7. Description of dialog-table words
 Write table authorization
This word consists of two parts: The 8 most-significant bits should
contain the value 0xA5, whereas the 8 least-significant bits should
contain the number of words in the dialog table, in hexadecimal notation
(hence, if the dialog table contains 12 words, the value of the
8 least-significant bits will be 0x0C, for example 16#A50C).
This word is a safety measure for the pilot device and for the display unit:
Unless this word has the expected value, the display unit will refrain from
writing anything to the pilot device memory, and conversely, will refrain
from interpreting the command words it might find in the dialog table. The
message "INCORRECT AUTHORIZATION TABLE" is displayed
intermittently until the word is correct.
Note that there is no possible validity check for an alarm table not located
in the pilot device.
 Clear log/Advanced functions
This 16-bit word is split into two bytes: The most-significant byte is used
to define the function required of the display unit by the pilot device, and
the least-significant byte is used to switch the parameters to the function
called by the most-significant byte.
XBT <- PLC 0xA5 No. of words in the dialog table
Bit 15 8 7 0
XBT <- PLC Function code Function data
Bit 15 8 7 0
XBT ref. Note
N200 No alarm management
N200/N400/N410
NU400
R400/R410
No choice of backlight color