Preliminary Checks - Mitsubishi Electric MELSEC-F FX3U-J1939 User Manual

FX -J1939 User's Manual
3U
12.1

Preliminary Checks

Check the RUN, FROM/TO, Tx/Rx, ERROR and POWER LED status.
1. RUN LED
LED State
OFF
ON
2. FROM/TO LED
LED State
OFF
ON
3. Tx/Rx LED
LED State
OFF
ON
4. ERROR LED
LED State
OFF
*1
SINGLE FLASH
*1
BLINKING
ON
*1. ERROR LED has two kinds of flicker states: single flash and blinking. This LED flickers as follows.
FX -J1939 is in offline.
3U
FX -J1939 is in online.
3U
PLC is not accessing BFMs in FX
3U
PLC is accessing BFMs in FX -J1939.
3U
FX -J1939 is not transmitting or receiving messages.
3U
FX -J1939 is transmitting or receiving messages.
3U
Normal operation (status)
FX -J1939 is in error passive state.
3U
At least one of the error counters of the module has reached or exceeded the warning level.
Check the following points in the network.
• Check that the terminating resistors at both ends of the network are connected.
• Check that all nodes have the same baud rate setting.
• Check that all nodes have a unique Node ID setting.
• Check that the CAN_H, CAN_L and CAN_GND wires are not broken.
• Check that the CAN_H, CAN_L and CAN_GND are wired correctly.
• Check that the CAN_SHLD is grounded.
• Check that the CAN_SHLD is connected at all nodes.
• Check that the CAN cable wires do not short circuit other CAN cable wires.
General error has occurred.
Check the error status in BFM #29.
FX -J1939 is in BUS-OFF state, or program/CPU error occurs in PLC main unit.
3U
The LED will always be ON if there is a BUS OFF error, a general error (BFM #29, bit 0), or the FROM/TO watchdog
is expired.
• Check the error status in BFM #29.
• Check the ERROR LED of the PLC
• Check the sequence program for FROM/TO watchdog.
• Check that the CAN_H, CAN_L and CAN_GND are wired correctly.
Description
Description
-J1939.
Description
Description
For FX
Series PLC, refer to FX
3G
For FX
Series PLC, refer to FX
3GC
For FX
Series PLC, refer to FX
3U
For FX
3UC Series PLC, refer to FX
For FX5U PLC, refer to MELSEC iQ-F FX5U User's Manual (Hardware)
For FX5UC PLC, refer to MELSEC iQ-F FX5UC User's Manual (Hardware)
For the FROM/TO watchdog, refer to Section 5.8
12 Diagnostics
12.1 Preliminary Checks
11
12
Refer to Section 12.2
Refer to Section 12.2
Hardware Edition
3G
Hardware Edition
3GC
Hardware Edition
3U
3UC Hardware Edition
93