5 Introduction of Functions
5.6 Communication Profile Area
65
FX
3U
-CAN User's Manual
1
Introduc
tion
2
Specifi
cations
3
Inst
allati
on
4
Wi
rin
g
5
Introduc
tion of
Functions
6
All
ocation of
B
uff
er
Memor
ies
7
Interface and
D
evice P
rofile
(40
5 mode)
8
Lift Appl
icati
on
P
ro
file
(417 M
ode)
9
CAN
Layer 2
Mode
10
Comm
and
Interface
5.6.7
SYNC
The SYNC producer broadcasts the synchronization object periodically. The SYNC message provides the
basic network synchronization mechanism. The time period between SYNC messages is specified by the
standard parameter communication cycle period. There may be a time jitter in transmission by the SYNC
producer corresponding approximately to the latency from some other message being transmitted just before
the SYNC.
SYNC Object
1. Object H1005: COB-ID SYNC message
In order to guarantee timely access to the network, the SYNC is given a very high priority CAN-ID.
→
For the COB-ID, refer to Subsection 5.6.1
2. Object H1006: Communication cycle period
This object provides the communication cycle period. This period defines the SYNC interval. The 32 bit value
is in units of
μ
s (FX
3U
-CAN counting resolution: 1 ms).
The FX
3U
-CAN counting resolution is 1ms, values smaller than 1ms will be set internally to 1ms, values
starting from 1ms will be divided by 1000.
The value 0 disables SYNC producing. The module needs to be active NMT Master to produce SYNC
messages.
Setting range: K0 to K4,294,967,295
→
For NMT Master, refer to Subsection 5.8.5
Bit No.
Item
Description / set range
Bit 0 to 10
11-bit CAN-ID
11-bit CAN-ID of the CAN base frame
Bit 11 to 28
-
Bit 11 to 28 fixed to OFF (0).
Bit 29
-
Bit 29 fixed to OFF (0).
Bit 30
gen.
OFF (0): Don't generate SYNC message
ON (1):
Generate SYNC message
Note:
•
The device needs to be active NMT Master to produce SYNC messages.
•
The Index H1006 needs to be set to enable SYNC producing.
Bit 31
X
Do not care
Request
SYNC consumers
0 byte
SYNC producer
Indication
Indication
Indication
Communication cyclic period
Time
SYNC triggered PDO Objects
11-bit CAN-ID
H00000
H0
gen.
X
31
29
26 ... 11
10 ... 0
30
Summary of Contents for FX3U-CAN
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