MITSUBISHI ELECTRIC FX2N - Manual (Page 48)

FX2N-32DP-IF Profibus-DP Interface Unit Diagnostics 8
8-2
8.2 Check the Status of the LEDs for the 32DP-IF
If the 32DP-IF does not seem to operate normally, check the following items.
1) Check the status of the “POWER LED”.
2) Check the status of the “RUN LED”
3) Check the status of the “BF LED”
4) Check the status of the “DIA LED”
Table 8.1: POWER LED Check
Status Description
Lit Power source is OK.
Otherwise Possible AC power failure, check AC power line and power source.
Table 8.2: RUN LED Check
Status Description
Lit
The 32DP-IF will exchange data with extension units/blocks and special function
blocks.
Otherwise
The 32DP-IF will exchange only input data with extension units/blocks. Check position
of the RUN/STOP switch. If the switch is in the STOP position, change to RUN.
If this switch is RUN position, check power supply for special function blocks and
extension I/O units/blocks.
Table 8.3: BF LED Check
Status Description
Unlit 32DP-IF will exchange data with Profibus-DP network.
Otherwise
Check D8024. If D8024 does not show a stable baud rate (i.e. always changing) then
check DP-network cables.
Check M8004. If M8004 is ON, refer to Table 8.6.
Table 8.4: DIA LED Check
Status Description
Unlit Diagnostic data is not detected.
Otherwise
Check status of M8004, and DP-master setting.
If M8004 is ON, refer to Table 8.6.