Mitsubishi Electric MELSEC iQ-R - Format of Access Blocks for Reading

APPX
Appendix 7 Data Block Formats
291
A
Format of access blocks for reading
The following shows the buffer memory format of access blocks for reading, including data ranges and availability of reading/
writing data from a CPU module.
When creating a program, read the offset value in the following table with the start buffer memory address displayed with a
configuration function.
R: Read-only, W: Write-only, R/W: Read/Write
• Up to 4 read target properties can be set.
• When setting multiple properties, always use the properties in order from Property-1.
• When an unused Property exists, store 'FFFFh' to a PropertyIdentifier. The ArrayIndex and the read data of the Property
are not read.
Offset Name Description R/W Initial
value
Data range
+0 CONTROL Indicates the processing status of a
ReadPropertyMultiple(ReadProperty) service.
0: Idling
1: Send request
2: Sending
3; Normal completion
4: Error end
R/W 0 0h to 4h
+1 STATUS An error code is stored.
Page 236 Error Code List for BACnet Request Function/BACnet
Monitoring Function
R 0 0h to 11h
+2 to +3 Instance number of a destination
device
Store the instance number of a read target BACnet device.
32-bit unsigned integer
R/W 0 0h to
3FFFFFh
+4 to +5 ObjectIdentifier b31 to b22: Object type number R/W 0 0h to 3FFh
b21 to b0: Instance number 0h to
3FFFFFh
+6 Property-1 PropertyIdentifier Store the PropertyIdentifier of a read target property. R/W 0 0h to FFFFh
+7 ArrayIndex When a read target property is ARRAY type, store the index number.
If the data type is not ARRAY, store 'FFFFh'.
R/W 0 0h to FFFFh
+8 to +11 Read data A format is RDTB.
Page 289 Format of RDTB
R 
+12 Property-2 PropertyIdentifier Store the PropertyIdentifier of a read target property.
If no read target properties exist, store 'FFFFh'.
R/W 0 0h to FFFFh
+13 ArrayIndex When a read target property is ARRAY type, store the index number.
If the data type is not ARRAY, store 'FFFFh'.
R/W 0 0h to FFFFh
+14 to +17 Read data A format is RDTB.
Page 289 Format of RDTB
R 
+18 Property-3 PropertyIdentifier Store the PropertyIdentifier of a read target property.
If no read target properties exist, store 'FFFFh'.
R/W 0 0h to FFFFh
+19 ArrayIndex When a read target property is ARRAY type, store the index number.
If the data type is not ARRAY, store 'FFFFh'.
R/W 0 0h to FFFFh
+20 to +23 Read data A format is RDTB.
Page 289 Format of RDTB
R 
+24 Property-4 PropertyIdentifier Store the PropertyIdentifier of a read target property.
If no read target properties exist, store 'FFFFh'.
R/W 0 0h to FFFFh
+25 ArrayIndex When a read target property is ARRAY type, store the index number.
If the data type is not ARRAY, store 'FFFFh'.
R/W 0 0h to FFFFh
+26 to +29 Read data A format is RDTB.
Page 289 Format of RDTB
R 