Transmission Cable Short Detection Function - Mitsubishi Electric FX3U-128ASL-M User Manual

FX -128ASL-M User's Manual
3U
6.2.5

Transmission cable short detection function

1) Outline
The transmission cable short detection function detects DP/DN short in the AnyWireASLINK system and
stops transmission to prevent breakage of the modules and to protect the system.
2) Description
- When transmission cable short is detected, the ALM LED flashes repeatedly at one-second intervals.
- DP/DN short error (BFM#28 b1) turns ON.
- The error code "K201" is stored in the latest error code storage area (BFM#29).
- The error code "K4095" is stored in the latest error ID storage area (BFM#10257).
- The transmission clock stops for two seconds. (The system checks for short at two-second intervals.)
*1. If multiple errors occur simultaneously, the error with the highest priority is displayed and stored.
3) How to recover from the transmission cable short status
How to recover from the transmission cable short status is as follows.
a) Eliminate the short in the AnyWireASLINK system.
When the short is removed, the following will occur:
- Bit transmission is resumed automatically.
- The ALM LED keeps flashing.
- The DP/DN short error (b1 of BFM#28) remains in the ON status.
- The error code "K201" remains stored in the latest error code storage area (BFM#29), and the error
code "K4095" remains stored in the latest error ID storage area (BFM#10257).
(If a new error occurs, the old error is overwritten by the latest error in accordance with the priority.)
If the status does not change, the short has not been eliminated. Therefore, check it again.
b) Power OFF the AnyWireASLINK system or turn ON and OFF error flag clear command (BFM#27 b0).
The following will occur:
- The ALM LED turns OFF.
- DP/DN short error (BFM#28 b1) turns OFF.
- The error code "K201" stored in the latest error code storage area (BFM#29) is cleared.
- The error code "K4095" stored in the latest error ID storage area (BFM#10257) is cleared.
46
6 Introduction of Functions
6.2 Details of functions
*1
*1
*1