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Protection Function; Cc-link Ie Field Network Diagnostic Function - Mitsubishi Electric NZ2GF12A4-16D User Manual

Cc-link ie field network waterproof/dustproof remote i/o module.
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8.12

Protection Function

The I/O module has the following protection functions.
: Available, : Not available
Protection function
Overload protection function
Overheat protection function
Power supply overvoltage protection
function
The protection functions do not protect external devices but protect the internal circuit of the module.
A problem on a load may raise the internal temperature of the module, causing deterioration in output
elements and discoloration on the case and the printed-circuit board. Turn off the corresponding output as
soon as a problem on a load is found, and remove the cause.
The following describes the operation of each protection function.
Overload protection function
If the output module and I/O combined module detect overcurrent, the module performs the current limiting operation (that
imposes a limit on the output current to a constant value and keeps the output).
For the overcurrent detection value and the limited current, refer to "Overload protection function" in the specifications table
for each module.
Page 26 Output module
Page 34 I/O combined module
If the load current becomes equal to the overcurrent detection value or lower, the module returns to normal operation.
Overheat protection function
If the output module and I/O combined module keep outputting the overcurrent caused by an overload, heat is generated
inside the module. If the module detects a high heat in its inside, it turns off the output.
The multiple points at which the overheat protection function operates simultaneously depend on the module. Refer to
"Overheat protection function" in the specifications table for each module.
Page 26 Output module
Page 34 I/O combined module
If the heat descends, the module automatically returns to normal operation.
Power supply overvoltage protection function
If the module power supply of the I/O module becomes the overvoltage state, the module stops the operation.
If the voltage of the module power supply descends, the module automatically returns to normal operation.
8.13

CC-Link IE Field Network Diagnostic Function

This function allows the presence or absence of a network error to be checked by accessing the engineering tool connected to
the CPU module.
How to use
The following instructions assume the use of GX Works2 as the engineering tool.
1.
Connect GX Works2 to the CPU module.
8 FUNCTIONS
8.12 Protection Function
Input module
Output module
I/O combined module

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