36
6
Report format
UNS8
ro
7
Particles/ml 1. channel
REAL32
ro
8
Particles/ml 2. channel
REAL32
ro
9
Particles/ml 3. channel
REAL32
ro
A
Particles/ml 4. channel
REAL32
ro
B
Volume flow
REAL32
ro
5.4.2.7.
Process values
Process values are contamination classes acc. ISO 4406 or NAS 1638 and the volume
flow in the measuring channel.
These are at index 5000h as Unsigned16
– values.
At index 5100h there are the particle numbers and the volume flow as Real32
– value.
The unit of the volume flow is ml/min.
5.5. SDO (Service Data Object)
With Service Data Objects the access to entries of a device Object Dictionary is
provided.
It is a client-server communication.
A client request is always confirmed by a reply from the server.
The CCM 01 represents an SDO-Server.
For an SDO transfer following COB-IDs are used:
COB-ID
Description
0x600 + Node ID
SDO Client
CCM01
0x580 + Node ID
CCM01
SDO Client
At an SDO the 8 byte data consist of the Command Specifier (CS), a 16
– Bit index, an
8
– Bit subindex and maximum 4 byte data.
The buildup is shown in the next illustration.
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
CS
Index
Subidx
Data
At an SDO request the Command Specifier indicates the type of request (read or write).
With a writing acces it contains also information about the number of bytes in the data
field.
At an SDO response the Command Specifier indicates the success of the request.
At a reading request it also contains information about the number of bytes in the data
field.
When the request was not successful the data field contains a 4 byte error code.
The meaning of these error codes is described in the specification DS-301.
CS (hex)
Description
Type of telegramme
2F
Write 1 Byte
Request
2B
Write 2 Byte
Request
27
Write 3 Byte
Request
23
Write 4 Byte
Request
60
Writing successful
Response
80
Error
Response
40
Reading request
Request
4F
1 Byte data
Response
4B
2 Byte data
Response
47
3 Byte data
Response
