SFA-5000 • SFA-10000 DeviceNet
6.3 I/O Messages (Msg group 1)
I/0 messages are used by Lika devices to send position and velocity values. The
“Message-ID” shows how the message is transmitted.
Position:
CAN-ID
4 CAN Data bytes
10
9…6
5…0
Byte 0
Byte 1
Byte 2
Byte 3
0 Msg ID
Source
ID
2
7
…2
0
2
15
…2
8
2
23
…2
16
2
31
…2
24
Low
…
…
High
Position and velocity:
CAN-ID
8 CAN Data bytes
10
9…6
5…0
Position
Velocity
0 Msg ID
Source
ID
B 0 B 1 B 2 B 3 B 4 B 5 B 6 B 7
Lo
…
…
Hi Lo
…
…
Hi
Msg-ID:
1100
2
: Slave's I/O Multicast Poll Response Msg
1101
2
: Slave's I/O Change Of State or Cyclic Msg
1111
2
: Slave's I/O Poll Rsp/COS/Cyclic Ack Msg
Source-ID:
device address.
Byte 0 … Byte 3:
position value.
Available Slave transmission modes:
Polled:
the Master device sends a polled request and the Slave device replies
sending its position value.
If the expected packet rate of polled mode is null (see
attribute), communication is always active and time-
out status is never triggered; otherwise if the Slave does not receive any
message from the Master within the time set in the
attribute, then the communication is closed (time-out status).
Cyclic:
the Slave sends an “I/O message” cyclically. The time between two
subsequent transmissions is set in the
05-Inst-09 Expected packet rate
attribute of the cyclic mode (see the “6.5.3 Class 05h: Connection Object“
section on page 63).
Change Of State:
the Slave sends an “I/O message” every time its status
changes or at every heartbeat rate.
The Slave can use one of the afore-mentioned “I/O messages” transmission
modes only if a peer-to-peer (P2P) connection is arranged with the Master
(using an “Explicit Messages Connection”, see the “6.4.3 Explicit Messages
Connection“ section on page 55).
MAN SFA_5000_10000_FD E 1.0.odt
DeviceNet interface
50 of 88
Содержание SFA-10000-FD
Страница 85: ...This page intentionally left blank ...
Страница 86: ...This page intentionally left blank ...
Страница 87: ...This page intentionally left blank ...