Automatic control function programming manual ladder language

15.1.2.2 Concept of Port
The requester must associate each request with a port.
The same port is used for transmission of a request and reception of the answer.
Two types of port can be accessed:
- 16 ports with addresses from 0x30 to 0x3F allow the requester to send several requests in parallel,
- 8 ports with addresses from 0x10 to 0x17, associated with axis groups 1 to 8, are used to receive unsolicited data
from the part programme ($1 in the part programme).
USER
PROGRAMME
(UNITE requester)
TRANSMISSION
(Port 0x30)
TRANSMISSION
(Port 0x32)
TRANSMISSION
(Port 0x33)
RECEPTION
(PORT 0x30)
RECEPTION
(PORT 0x32)
RECEPTION
(PORT 0x33)
RECEPTION
(PORTS 0x10 to 0x17)
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MONITOR
ANSWER ACQUISITION
PORT 0x30
ANSWER
1
PORT 0x32
ANSWER
2
PORT 0x33
ANSWER
3
PORTS 0x10 to 0x17
"Unsolicited"
REQUEST
QUEUE OF
REQUESTS
REQUEST
1
REQUEST
2
REQUEST
PORT 0x30
3
PORT 0x32
PORT 0x33
Figure 15.3 - Use of ports
CNC
FUNCTION
(UNITE servers)
REQUEST
PROCESSING
Message
addressed to
the machine
processor
($1 or $11
in the part
programme)