Online Module Change In A Remote I/O Station - Mitsubishi Electric QJ71LP21 Reference Manual

3 SPECIFICATIONS
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(9) Online module change on a remote I/O station
Online module change is the function for replacing a Q series module mounted
on the main base unit or extension base unit of a remote I/O station while the
station is operating.
Using this function, a faulty module can be replaced with a module of the same
model while the station is operating.
POINT
(1) A new module cannot be added and a module cannot be replaced with
different model by using the online module change.
(2) Perform online module change after confirming that the system outside the
PLC system will not malfunction.
(3) In order to prevent electric shocks or malfunction, provide a switch or other
method to turn off the external power supply of the module to be replaced
online.
(4) In order to confirm the content shown below, it is recommended to perform
online change on an actual system in advance to verify that no error is found
in the operations of the modules out of the scope of change.
• Isn't there any error in the method and configuration for disconnecting
external devices?
• Isn't any influence found from the turning on/off of switches and so on?
(5) Do not mount/remove the module onto/from base unit more than 50 times
(IEC61131-2-compliant), after the first use of the product.
Failure to do so may cause the module to malfunction due to poor contact of
connector.
(a) Conditions for online module change on a remote I/O station
Online module change can be performed in the following cases:
1) Target modules of online module change in a remote I/O station
Target modules of online module change are shown in the table
below.
Input module
Output module
I/O combined module
Analog-digital conversion module
Chanel isolated high resolution analog-digital conversion module
Chanel isolated high resolution distributor
Digital-analog converter module
Chanel isolated digital-analog module
Intelligent Temperature input module
function module
Temperature control module
Thermocouple input module
Chanel isolated thermocouple/micro voltage input module
Temperature sersor input module
Chanel isolated temperature sersor input input module
Chanel isolated pulse input module
Modules other than above cannot be replaced online.
For whether the intelligent function module can be replaced online and
replacement procedure, refer to the manual of the intelligent function
module used.
Module type
MELSEC-Q
Restriction
No restriction
Function version "C"
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