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-128ASL-M User's Manual
3U
6.2.6
Disconnected transmission cable location detection function
1) Outline
This function makes the 128ASL-M send a response request to the ID (address) registered by the
automatic address detection during bit transmission, and judges that the transmission cable is
disconnected if the slave module does not respond to the response request.
2) Description
- When transmission cable disconnection is detected, the ALM LED turns ON.
- DP/DN disconnection error (BFM#28 b4) turns ON.
- The error code "K202" is stored in the latest error code storage area (BFM#29).
- The number of error IDs is stored in the number of error IDs (BFM#8192).
- The disconnected ID (address) of the slave module is stored in error ID information storage area
(BFM#8193 to BFM#8320).
- The disconnected ID (address) is stored in the latest error ID storage area (BFM#10257).
- The bit transmission is not stopped.
*1. If multiple errors occur simultaneously, the error with the highest priority is displayed and stored.
3) How to recover from the transmission cable disconnection status
How to recover from the transmission cable disconnection status is as follows.
a) Clear the disconnection status in the AnyWireASLINK system.
When the connection is repaired, the following will occur:
- The bit transmission with the slave module which has been disconnected so far is recovered to the
normal status.
- The ALM LED keeps ON.
- The DP/DN disconnection error (b1 of BFM#28) remains in the ON status.
- The error code "K202" remains stored in the latest error code storage area (BFM#29).
(If a new error occurs, the old error is overwritten by the latest error in accordance with the priority.)
- The number of error IDs remains stored in the number of error IDs (BFM#8192).
- The ID (address) of disconnected slave modules remains stored in the error ID information storage
areas (BFM#8193 to BFM#8320).
- The disconnected ID (address) remains stored in the latest error ID storage area (BFM#10257).
If the status does not change, the connection has not been repaired. 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 disconnection error (BFM#28 b4) turns OFF.
- The error code "K202" stored in the latest error code storage area (BFM#29) is cleared.
- The number of error IDs is cleared in the number of error IDs (BFM#8192).
- The ID (address) of disconnected slave modules is cleared in the error ID information storage areas
(BFM#8193 to BFM#8320).
- The disconnected ID (address) is cleared in the latest error ID storage area (BFM#10257).
Caution
• The disconnected transmission cable location detection function becomes effective approximately five
seconds after the 128ASL-M is powered ON (and the POWER LED lights).
• The error status in the LED and buffer memory can be reset also by the automatic address detection.
However, if there are slave modules which do not give response, they are not detected automatically and
not registered. As a result, they are not regarded as monitoring targets of the disconnected transmission
cable location detection function. (Even if such slave modules are not regarded as monitoring targets, their
I/O areas still function.)
6 Introduction of Functions
6.2 Details of functions
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