Mitsubishi MELSEC LJ71C24, User Manual

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6 SETTING AND WIRING
6.4 Individual Station Test
After installing the C24 to a system, check the switch setting and operation of the C24
at first.
The individual station test consists of the following two tests.
(1) ROM/RAM/switch test
Checks the contents of the memory of the C24 and the switch settings set with
GX Works2.
(2) Self-loopback test
Checks the communication between the C24 and CPU modules and the
operation of the communication function of the C24.
POINT
(1) When a problem occurs during data communication with an external device, perform
an individual station test to check whether or not there is any problem in the
operation of the C24.
(2) In order to avoid problems, set the CPU module to STOP status during the individual
station test.
(3) Cable removal and reconnection before and after the Self-loopback test should be
performed with the power to the C24-connected station turned off.
(4) To restart data communication with an external device after an individual station
test, check the specifications of the devices used before defining various settings
and reconnecting cables.
(5) If an error occurs even though the correct settings have been made for the C24
through an individual station test, please consult your local Mitsubishi service center
or representative, explaining a detailed description of the problem.