User manual

Magelis C - 79
7. Description of dialog-table words
C
The list of function codes and parameters supported are as follows:
In cases where the pilot device might send the display unit a command:
- That is unspecified
- With incorrect parameters
the display unit simply ignores the command.
For function 0, the pilot device can check that the request has been
recognized by examining the value of the “Log fill level” word.
For function 2, the pilot device has a check to ensure acknowledgment
of its request via the “Terminal advanced status” word in the write cycle
of the DT following its request.
Function 0
:
This function has only one parameter value: 0xFF. When the PLC writes
0x00FF to the “Clear log” word, the terminal clears the associated alarm
log. As long as the PLC retains the value 0x00FF, the log is not cleared
again. To repeat a clear instruction, a neutral value must be written to the
word (for example 0x0000) and then 0x00FF written again.
Function 1
:
The backlight colors are defined as follows:
Function Parameter
0 Clear the alarm log 0xFF
1 Forces the backlight color
0 to 4
(XBT N401/R411)
2
Forces the display unit
password level
0 to 7
Color Function parameters (LSB)
Unchanged 0
Red 1
Green 2
Orange 3
No backlight 4
XBT ref. Note
N200 No alarm management
N200/N400/N410
NU400
R400/R410
No choice of backlight color