Mitsubishi QJ71C24N User Manual page 131

4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
(Procedure 3) Checking results of ROM/RAM/switch tests
Buffer memory monitored
Address CH1 side
Bit location 201
b0
b1
b2
b3
b4
b5 to b6
b7 NEU
b8 to b13
b14
b15
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(2) Restart the programmable controller CPU station or reset the CPU. The test starts
automatically in about one second.
(3) For the Q series C24, the following tests should be performed once.
1) ROM check
Read the ROM data and verify the sum check.
2) RAM check
Write data to RAM, and read and check it.
3) Switch check
Check whether or not each switch is set within the tolerance range and the
operation setting in the transmission settings is set to off.
4) Linked operation setting check (perform this test with the operation setting in
the transmission settings of CH2 set to on)
Check to see that the communication protocol setting on CH1 is set to 8
whether the communication rate setting of each channel is within the tolerance
range.
A linked operation setting check is performed when values are set as follows:
• Communication protocol setting on the CH1 side
• Operation setting in the transmission settings on the CH2 side: bit 0 = ON.
(1) The test is completed when the NEU LED on CH1 side is lit (approximately 2
seconds).
(2) The test is completed normally when the ERR LED turns off.
(3) The test is completed with error when the ERR LED turns on. Check the error
description in one of the following screens.
• The "Monitor/test others" screen of GX Configurator-SC (see Section 9.6.10)
• The buffer memory monitor screen of GX Developer (see the GX Developer
Manual for the operation method)
When checking errors in the buffer memory monitor screen of GX Developer,
monitor the following buffer memory.
Check the error descriptions on the screens by bit-decoding the monitored value
(16-bit integer). Each bit corresponds to the following error description.
CH2 side CH1/CH2 side
202 203
H H
— —
SIO —
PRO —
P/S —
C/N —
— —
—
—
CH2 ERR —
Setting station
— —
number
CH1 ERR —
1 Consult your nearest dealer.
Description when corresponding bit is on
H
When linked operation Transmission setting error
setting
Protocol setting error
When independent Transmission setting error
operation setting
Protocol setting error
Test completed
RAM error
Out of the setting station number range
ROM error
—
Review setting value
(see Section 4.5.2)
—
—
Review setting value
(see Section 4.5.2)
MELSEC-Q
and
H
: 8
H
Corrective action
—
—
—
( 1)
( 1)
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