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MELSEC-Q
4 SETTINGS AND PROCEDURES FOR OPERATION
(1) Method of setting the slave address
There are two methods of setting the slave address.
Select either of the followings as necessary.
(a) Using the switches (on the QJ71AS92 front panel):
Setting can be made without a peripheral device.
(b) Using the command (for the QJ71AS92):
Setting can be made in the environment where the module cannot be
operated (the module is installed in the inaccessible place far end of an
operator panel).
The following chart shows the operation sequence of each method.
Slave address setting *1
<Select the configuration mode>
If the CM LED is not ON, press the MODE switch until the
CM LED is lit to select the configuration mode.
<Method of erasing the slave address (set the slave
address to 0)>
When the slave address you want to erase is displayed on
the CODE LED, press the SET switch for more than
5 seconds. (See Section 4.5.3)
*1: The slave address can be set to only the slave that has
been set to address 0.
For details of the method of using the switches, See
Section 4.5.1 and later.
Using the switches
<Send the command>
1) Set 200
H
in the command buffer <request>
(buffer memory address 55
H
).
2) Set the current slave address in the command buffer
<request (data word 0)> (buffer memory address 56
H
). *3
3) Set a new slave address in the command buffer
<request (data word 1)> (buffer memory address 57
H
). *3
4) Turn Y12 ON (command request).
5) Turn Y12 OFF after making sure that X12
(command completion) has turned ON.
6) Check the result of the command buffer <result>
(buffer memory address 25
H
).
*2: See Section 5.6 for the operation of GX Configurator-AS.
*3: See Section 3.5.1 for the values to be set to the command
data.
Using the command
(Program or GX Configurator-AS *2)
<Method of setting the slave address to the slave of slave
address 0> (See Section 4.5.2)
1) Press the SET switch to display the address you want to
set on the CODE LED.
2) Hold down the SET switch until the address displayed on
the CODE LED flickers.
3) After it has flickered, press the SET switch again.
This sets the slave address displayed on the CODE LED
to the slave of slave address 0.
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