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MELSEC-Q
4 SETTINGS AND PROCEDURES FOR OPERATION
4.5.2 Slave address assignment
This section describes how to assign any slave address to the slave of slave address 0
by using the switches on the front of the QJ71AS92 panel.
Following is the example when the slaves of slave No.1 and 2 have been registered.
A
B
A
B
A
B
(1) Put the QJ71AS92 in the configuration mode by reference to Section 4.5.1 (1).
(2) The QJ71AS92 displays all the slave addresses of the recognised slaves in
order on the CODE LED. "0" is displayed if the slave of slave address 0 is
connected. If the recognised slave is the Ver. 2.11-compatible grouped slave,
the QJ71AS92 lights up the "A"/"B" LED on the right of the CODE LED to
indicate that the slave is in group A or B.
A
B
A
B
A
B
(3) Press the SET switch to display the usable slave addresses. The usable slave
address is displayed in order every time the SET switch is pressed.
For the Ver. 2.11-compatible grouped slaves, the QJ71AS92 lights up the "A"
LED on the right of the CODE LED and displays the slaves in group A. After
that, the slave addresses of group B appear consecutively.
If the SET or MODE switch is not operated for longer than 10 seconds, the
QJ71AS92 returns to the display status in (1).
CODE
A
MODE
SET
B
flikers
(4) When the slave address to be set has appeared, press the SET switch until the
indicated slave address flickers. This selects the target slave address.
(5) When the SET switch is pressed again, the flickering slave address is set to the
slave of slave address 0. (It is stored into the nonvolatile memory of the slave.)
A
B
A
B
A
B
(6) The slave address of the slave recognized again appears on the CODE LED.
(Related item: Section 4.5 (1))
TIP
When changing the slave address of the slave by using the switches on the front of
the panel, the QJ71AS92 assigns the target slave address after assigning the slave
address 0 to the slave once.
See Section 4.5.3 for the method to set the slave address to 0.
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