Memory Transfer - Georges Renault DEVICE NET Manuel Opérateur

4 - Memory Transfer

When the tightening controller is configured in "Memory transfer", 32 input bytes and 32 output bytes are added to the
standard cyclic I/O's. This additional area allows the PLC to access the whole CVI mapping in read-only or write-only mode.
Outputs: Write-only data fort the PLC (Memory transfer)
Index
1 Network inputs (channel 1)
2 Network inputs (channel 2)
3 24 volt input mask (channel 1)
4 24 volt input mask (channel 2)
5 Cycle no. selection (Station 1)
6 Cycle no. selection (Station 2)
7 Request counter
8 Function (1 = reading, 2 = writing)
9 Reserved ( = 0 )
10 Mapping address
11 Length
12 Reserved
13 Data
Inputs: Read-only data fort the PLC (Memory transfer)
Index
1 24 volt outputs (channel 1)
2 24 volt outputs (channel 2)
3 24 volt inputs (channel 1)
4 24 volt inputs (channel 2)
5 Cycle no. acknowledge (Station 1)
6 Cycle no. acknowledge (Station 2)
7 Request counter acknowledge
8 Function acknowledge
9 Reserved ( = 0 )
10 Mapping address acknowledge
11 Transfer length
12 Error
13 Data
To perform a request, the PLC must complete the following in the I/O area:
- Function to be performed: 01 for data reading, 02 for writing.
- The address of the memory mapping to which the function is linked.
- The length of the transfer to be performed
- If in write-only mode, the data to be written.
Then the PLC must modify the request counter to allow the tightening controller to take account of the request.
Once the request has been performed, the controller will echo the counter, function code, address and transfer length, as well as
the error code and the data if in read-only mode.
Error code:
0: No error
1: Length > 24
2: Report Address not valid or request to write on an object already present in the standard I/O's.
3: Unknown function
4: Reserved area (index 9) not null.
Operator's Manual
DEVICE NET
Description
Description
Size
Type
bytes
Word 2
Word 2
Word 2
Word 2
Word 2
Word 2
Byte 1
Byte 1
Word 2
Word 2
Byte 1
Byte 1
Byte 24
Size
Type
bytes
Word 2
Word 2
Word 2
Word 2
Word 2
Word 2
Byte 1
Byte 1
Word 2
Word 2
Byte 1
Byte 1
Byte 24
6159932680-01
English
9/28
Standard I/O's
Standard I/O's