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4 FUNCTION
4.9 Transmission Cable Voltage Drop Detection Function
31
4
4.9
Transmission Cable Voltage Drop Detection
Function
This function detects a voltage drop in the 24 V DC external power supply, enabling the FX5-ASL-M to detect a failure in the
24 V DC external power supply or a wiring error from the upper system.
For the specifications of the 24 V DC external power supply to the FX5-ASL-M, refer to the
How to check the transmission cable voltage drop status
When the AnyWireASLINK system is in the following status, a voltage drop in the 24 V DC external power supply has been
detected.
• The ALM LED flashes at 0.2 second intervals.
*1
• 'Transmission cable voltage drop error' (Un\G28 b3) turns on.
• Transmission cable voltage drop error (error code: 0CC8H) is stored in 'Latest error code storage area' (Un\G10256) and
0FFFH is stored in 'Latest error ID storage area' (Un\G10257).
*1
• The AnyWireASLINK bit transmission stops.
*1 If multiple errors occur simultaneously, the latest error is displayed.
How to recover from the transmission cable voltage drop status
How to recover from the transmission cable voltage drop status is as follows.
1.
Check the voltage of the 24 V DC external power supply and replace the power supply or check the wiring, as necessary.
When the transmission cable voltage drop is corrected, AnyWireASLINK bit transmission resumes automatically.
2.
Power off and on the AnyWireASLINK system or turn on and off 'Error flag clear command' (Un\G27 b0).
The following status is resulted:
• 'Transmission cable voltage drop error' (Un\G28 b3) turns off.
• The ALM LED turns off.
• The data in 'Latest error code storage area' (Un\G10256) and 'Latest error ID storage area' (Un\G10257) are cleared.
Summary of Contents for MELSEC iQ-F FX55-ASL-M
Page 1: ...MELSEC iQ F FX5 User s Manual ASLINK ...
Page 2: ......
Page 12: ...10 INDEX 88 REVISIONS 90 WARRANTY 91 TRADEMARKS 92 ...
Page 13: ...11 CONTENTS ...
Page 23: ...3 PROCEDURES BEFORE OPERATION 21 3 MEMO ...
Page 91: ...I 89 MEMO ...
Page 95: ......