Mitsubishi Electric MELSEC iQ-R User Manual page 149

3.
Set the following items, and click the [Add] button.
Item
DeviceInstanceNo
ObjectID
BufferMemoryAddress
Disable
Periodic SubscribeCOV transmission
ProcessID
Confirmed/Unconfirmed
LifeTime
*1 For the method to assign multiple data blocks in a batch, refer to the following section.
Page 212 Assigning data blocks using a CSV file
4.
Click the [Detail] button.
Description
Specify the instance number of the send source device of COV notifications.
Select the ObjectType of the send source object of COV notifications, and enter an instance number.
Specify the start buffer memory address of an access block for COV interaction
Specify an even number within the range of 256 to 32767 (100h to 7FFFh).
To specify a buffer memory address in hexadecimal, add 'h' at the end of it.
When '0' is specified to the buffer memory address, the data blocks are automatically assigned to the free space in the
buffer memory.
Select this to store COV notification data to an access block for COV interaction without assigning the access block for
BACnet monitoring to the buffer memory.
To store COV notification data to an access block for BACnet monitoring, set the following settings.
• Set an access block for BACnet monitoring to monitor the send source of the COV notification
• Set '1' to "MonitorDataSetByCOV" in [Settings]  [Basic Information]  [BACnet Detail Setting] button 
"Interaction"
When this item is not selected, COVs are sent with an UnsolicitedCOV service.
When this item is selected, COVs are sent with a COV send request (SubscribeCOV service). The following three
items should be set.
Specify the ID of a target property.
Range: 1 to 4294967295
When to confirm notifications, select "Confirmed COV Notification".
When not to confirm notifications, select "Unconfirmed COV Notification".
Specify the cycle to read property values in seconds unit.
*1
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1 FUNCTIONS
1.7 COV Interaction Function
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