MITSUBISHI ELECTRIC FX2N - Manual (Page 29)

FX2N-32DP-IF Profibus-DP Interface Unit Advanced Devices 4
4-3
4.2 Diagnostic Devices (Special Devices)
Unsettable Devices:
Any device of type M or D that is marked with a “( )” or “( )” cannot be set by the program-
ming tool. In the case of M devices this means the associated coil cannot be driven but all
device can be monitored. For data devices D, new values cannot be written to the register
by a user but the register contents can be monitored.
Symbol Summary:
• automatically written to by the 32DP-IF
• automatically written to by the DP-master
• 32DP-IF send an extended diagnosis message to DP-master if marking device is ON.
For diagnostic massage, refer to chapter 7.