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D.4 Local Data Request/Response
Note: Only one connected client can make local data request/response
at a time. If more clients want to do local data request/response
these clients need to share this resource between them.
Local Data Request
Modbus TCP slave address 2, (0x02), to read/write new request for local data.
For more information regarding Pluto address range see chapter 5.4.3.4.
Address
Data Name
0
Flag
0 = request read by gateway.
3 = request set at write!
1
Request Pluto station id
0-31
Request Gateway
255 (0xFF)
2
Data Type
0 = global data
1 = Local memory
2 = Local register
3 = Local Parameter
3
Address
Local Data Response
Modbus TCP slave address 34, (0x22), to read response of written request.
Address
Data Name
0
Flag
6 = New data valid.
0 = set at write!
1
Pluto station id
[0-31]
2
Data Type
0 = global data
1 = Local memory
2 = Local register
3 = Local Parameter
3
Requested address
4
Error Code
0x0001 = Response OK
0x0002 = Request timeout
0x0004 = Request bad data
0x0008 = Request unknown
5
Response data
Sequence of use
The following sequence of commands shall be used when retrieveing local data,
Read slave address 2 and at least the first word.
-
Check that this flag is zero.
Data Type
UINT
UINT
UINT
UINT
Data Type
UINT
UINT
UINT
UINT
UINT
UDINT
131
Addr + 0
Addr + 1
-
-
-
-
-
-
-
-
-
-
MSW
LSW
2TLC172009M0110_D
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