Mitsubishi Electric MELSEC iQ-R - Details of Input Signals

APPX
Appendix 1 I/O Signals
249
A
Details of input signals
The following shows the input signals of BACnet modules for a CPU module.
Module READY (X0)
This signal turns ON when turning the power OFF and ON, or resetting a CPU module, or a BACnet module is ready. It turns
OFF when the module does not operate due to an error, such as a watchdog timer error.
Initialization complete/operation stop or restart (X1)
■ CheckYDevice in the BACnet detail setting is '0'
This signal turns ON when a BACnet module is started and initialization is complete. After the initialization is complete, the
buffer memory can be accessed and the functions of BACnet modules are available.
It turns OFF when the BACnet module is started but initialization is yet to complete.
■ CheckYDevice in the BACnet detail setting is '1'
This signal turns ON when "Joining of BACnet" (Y1) is turned ON.
This signal turns OFF by clicking the [Pause] button on the "Pause/Restart" screen displayed by selecting [Maintenance] 
[Pause/Restart] in a configuration function. In that case, turn "Joining of BACnet" (Y1) OFF.
• Set the CheckYDevice in [Settings]  [Basic Information]  [BACnet Detail Setting] button  "Interface". (Page 281
Interface)
BACnet status (join/leave) (X2)
This signal turns ON when a BACnet module has joined BACnet. (The value of the SystemStatus property of a Device object
in a BACnet module is Operational.)
It turns OFF when a BACnet module has left the BACnet. (The value of the SystemStatus property of a Device object in a
BACnet module is other than Operational.)
For the value of the SystemStatus property, refer to the address (Un\G16) described in the following section.
Page 261 Device object (Un\G16 to Un\G31)
Buffer memory access (X3)
This signal turns ON while a BACnet module performs cyclic reading of the buffer memory.
This signal turns OFF when the cycle reading is not performed.
For the cyclic reading, refer to the following section.
Page 264 Loading buffer memory
Time synchronization send complete (X5)
This signal turns ON when 'Time synchronization send request' (Y5) is turned ON and the sending of a TimeSynchronization
service or an UTC TimeSynchronization service is complete.
It turns OFF when a TimeSynchronization service or an UTC TimeSynchronization service is not sent or 'Time synchronization
send request' (Y5) is turned ON and OFF.
Who-Is send complete (X6)
This signal turns ON when a 'Who-Is send request' (Y6) is turned ON and the sending of a Who-Is service is complete.
It turns OFF when a Who-Is service is not sent, or 'Who-Is send request' (Y6) is turned ON and OFF.
Error occurrence (XF)
This signal turns ON when an error occurred on a BACnet module or on the network controlled by a BACnet module.
When this signal turned ON, the ALM LED turns ON.
It turns OFF when no error occurred on a BACnet module or on the network controlled by a BACnet module.