Mitsubishi Electric MELSEC Q Series User Manual page 180

4 SET-UP AND PROCEDURE BEFORE OPERATION
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(3) Precautions for access target CPU setting
(a) Web server module requires preparatory time to communicate with the
access target CPU when the "Update" button on the Setting update screen
is clicked, the programmable controller is powered off and then on, or the
CPU module is reset. Therefore, it may take several minutes before the
communication will be available if many access target CPUs are set.
Confirm that the setting update has been completed or the Web server
module has been ready (X0 is on), and make access from the personal
computer to the Web server module. ( 1)
1 When access is made from the personal computer to the Web server
module during preparation of the Web server module, the "Page cannot
be displayed" message is returned to the Web browser. Therefore, after
the Web server module has been ready, make access from the Web
browser again.
(b) Carefully set the "PLC series" of the access target CPU setting.
A wrong "PLC series" has been set, an error occurs in the programmable
controller CPU or module on the route to the access target CPU, and a
response time-out error (error code: 0002h) is displayed on the Web server
module.
(c) When accessing a redundant CPU, pay attention to the following.
1) If the Web server module is connected to a redundant CPU, it can
access only the CPU of its own station.
Access to the other station's CPU is not allowed.
2) If the Web server module is connected to any other than redundant
CPUs, it cannot access redundant CPUs on other stations.
MELSEC-Q
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