Mitsubishi MELSEC L Series User Manual page 112

(6) Initial Settings
(7) Programmable controller CPU monitoring function
(8) Remote password check
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The connection data used for modem functions can be registered as follows
using setting procedures.
Set the telephone number and message within the permissible number of
registration characters for modem/TA.
1) If registered using GX Configurator-SC
• Comments can be set to a maximum of 256 bytes. (These are not used for
control.)
• Telephone numbers can be set to a maximum of 64 bytes.
• Messages can be set to a maximum of 256 bytes.
2) If registered from the programmable controller CPU (sequence program)
• Comments cannot be set.
• Telephone numbers can be set to a maximum of 18 bytes.
• Messages can be set to a maximum of 30 bytes.
See Section 2.4 for precautions when transmitting monitoring results using the
modem function.
(a) How to unlock the remote password
1) When the Q series C24 has been set as a module subject to the remote
password check with the QCPU parameter, a remote password unlock
processing must be performed from the external device after line
connection before starting data communication.
2) The unlock processing for the QCPU remote password is performed as
follows:
• When communicating using MC protocol
Perform the unlock processing from the external device using
dedicated commands.
• When accessing the programmable controller from GX Developer
Perform the unlock processing on the GX Developer screen when
access begins.
(b) When the remote password unlock processing is completed abnormally
1) Repeat the unlock processing after checking the remote password set in
the QCPU.
2) Start with the line connect processing again if the Q series C24 line
connect signal (X12) turns OFF due to the unlock processing abnormal
completion.
3) The user should clear the accumulated count stored in the following
buffer memory before repeating the line connect processing if the Q
series C24 CHn side ERR occurrence signal (XE/XF) turns ON and the
ERR LED lights up due to the unlock processing abnormal completion.
(Applicable buffer memory)
Storage area for accumulated count of unlock process abnormal
completion accumulated : Address 8756 (22FC
(How to clear)
Cleared by the user using one of the following:
• Set the accumulated count to "0" on the GX Configurator-SC modem
function monitor/test screen.
• Write "0" to the applicable area of the buffer memory.
3 COMMUNICATIONS BY THE MODEM FUNCTION
)
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