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SAFETY PRECAUTIONS
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced in
this manual. Also pay careful attention to safety and handle the module properly.
The precautions given in this manual are concerned with this product. Refer to the user's manual of the
network system to use for a description of the network system safety precautions.
These SAFETY PRECAUTIONS classify the safety precautions into two categories: "DANGER" and
"CAUTION".
!
DANGER
CAUTION
!
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
Depending on circumstances, procedures indicated by
!
CAUTION may also be linked to serious
results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever necessary. Always
forward it to the end user.
[DESIGN PRECAUTIONS]
!
DANGER
Create an interlock circuit on the program so that the system will operate safety based on the
communication status information. Failure to so may cause an accident due to an erroneous
output or malfunction.
When an error occurs, all outputs are turned OFF in the MELSEC-ST system (at default).
However, I/O operations of the head module and respective slice modules can be selected for
the errors described below.
Select the status for each module for the entire system safety.
(1) Communication error (Head Module User’s Manual)
(2) Slice module error
The output status for the case of an error can be set to Clear, Hold or Preset with a
command parameter of each slice module. (For setting availability, refer to the manual for
each slice module.)
Since the parameter is defaulted to Clear, outputs will be turned off if an error occurs.
This parameter setting can be changed to Hold or Preset when the system safety is more
ensured by holding or presetting the output.
Summary of Contents for MELESEC-ST
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Page 114: ...10 22 10 22 10 MOUNTING AND INSTALLATION MELSEC ST MEMO...
Page 125: ...11 11 11 11 11 EMC AND LOW VOLTAGE DIRECTIVE MELSEC ST MEMO...
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