Start-Up Method Selection Function; Safety Output Function - Mitsubishi Electric MELSEC Q Series User Manual

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FUNCTIONS
4.3

Start-up Method Selection Function

This function allows to select the start-up method with start-up setting switch.
The start-up method has auto mode and manual mode.
(1) Auto mode
This mode starts immediately after safety input and off check are all met.
Set the start-up setting switch to "A" side.
Use this mode when connecting such as door switch.
(2) Manual mode
This mode starts by pressing the start-up switch when safety input and external
device connected to the start-up/off check terminal are all met.
The mode starts after the start-up input turns from ON to OFF to prevent a malfunction
due to contact welding of the start-up switch.
Set the start-up setting switch to "M" side.
Use this mode when connecting such as operation preparation switch.
POINT
4.4

Safety Output Function

This function prevents incorrect output due to a single failure by doubling safety relay
outputs internally.
The output can be stopped even if the one contact fails due to welding.
Moreover, once a contact fails due to welding, the system does not start after that;
therefore, the safety is not damaged.
• Never use the start-up switch during the auto mode.
• Doing so may cause a malfunction or failure of the module.
• According to the standard, the system cannot start at the auto mode for
operation preparation or when using the light curtain.
• In this case, connect the start-up switch or recovery reset switch and use
it in the manual mode.
• When using the start-up switch during the manual mode, always use the
momentary type of NO (normal open).
• Connect the normally closed contact of forcibly guided type to off check
input.
If using other than mentioned above, it may cause a malfunction or failure
of the module.
4.3 Start-up Method Selection Function
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