Automatic Address Detection Function; Performing The Automatic Address Detection - Mitsubishi Electric MELSEC-Q Series User Manual

7.3

Automatic Address Detection Function

Automatic address detection is a function to store the IDs (addresses) of the connected slave modules in the EEPROM
of the master module.
The parameters of the connected devices are automatically updated after storage in EEPROM of the master module
followed by detection of IDs (addresses) not set and the same IDs (addresses).
The ID (address) information stored in the EEPROM is held even when the power is turned off. However, information
about unset IDs and the same IDs and the parameter information of each slave module are not held.
Whenever starting the system or changing the system configuration, set the correct addresses to all the slave modules
and perform the automatic address detection.
7.3.1

Performing the automatic address detection

To perform the automatic address detection, use the SET switch or Automatic address detection command (Yn1).
(1) Using the SET switch
1.
Check that all of the slave modules are operating normally.
2.
Keep pressing the SET switch on the master module until the SET LED (green) turns on.
(At this time, Automatic address detection flag (X(n+1)4) turns on.)
3.
When the SET LED flashes for a while and turns off, the ID (address) has been stored.
4.
When Automatic address detection flag (X(n+1)4) turns off, automatic address detection is
completed.
(2) Using Automatic address detection command (Yn1)
1.
Check that all of the slave modules are operating normally.
2.
Turn on and off Automatic address detection command (Yn1). ( Page 33, Section 3.4)
(At this time, Automatic address detection flag (X(n+1)4) turns on.)
3.
When the SET LED flashes for a while and turns off, the ID (address) has been stored.
4.
When Automatic address detection flag (X(n+1)4) turns off, automatic address detection is
completed.
CHAPTER 7 VARIOUS SETTINGS
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