CANopen Agile
31
06/2010
Protocol
8.10
OS Synchronization
The operating System (OS) of the frequency inverter can be synchronized to the PLC or other devic-
es. The synchronization of the OS enhances the performance of the complete plant. Synchronization
is used to eliminate phase deviations of the CPUs between master and slave devices, so that calcu-
lations are done at the same time. Note, that only small deviations of the CPU clock frequencies
between devices (i.e. different CPU Quartz cock frequenices) of ± 1 ‰ can be compensated.
Synchronization via CANopen:
When using CANopen without Systembus, the synchronization can be switched on and off. Synchro-
nization can be only done with CANopen SYNC telegrams.
Synchronization via Systembus:
When using CANopen simultaneously with Systembus, the synchronization can be set to either CA-
Nopen, Systembus or it can be switched off. Synchronization can be done with Systembus SYNC
telegrams or Systembus RxPDO telegrams.
Note: When synchronizing the OS via CANopen, the master has to support the synchronization me-
chanisms of CANopen.
OS_SyncSource
1452
Operation Mode
Function
0 - Auto
The synchronization source is selected automatically by the inverter.
1 - CANopen
The OS is synchronized via CANopen. Factory setting.
2 - Systembus
The OS is synchronized via Systembus.
99 - Off
The OS is not synchronized with other devices.
Operation mode Auto: The selection is done via this decision table:
CANopen active
Systembus active
Synchronization
Yes
Yes
Synchronization via CANopen
Yes
No
No
Yes
Synchronization via Systembus
No
No
No Synchronization activated.
The CANopen "active status for synchronization" is recognized by the parameter setting 387
CAN
Node Number
>0 and a running synchronous PDO.
The Systembus "active status for synchronization" is recognized by the parameter setting 900
System-
bus Node ID
>0. Also parameter 1180
Synchronization
has to be set to SYNC or an RxPDO.
Protocol
1180 Operation Mode (Synchronization)
Operation Mode
1180
Function
0 - Aus
No evaluation of SYNC-Telegrams.
1 - RxPDO1
RxPDO1 used as SYNC-Telegram.
2 - RxPDO2
RxPDO2 used as SYNC-Telegram.
3 - RxPDO3
RxPDO3 used as SYNC-Telegram.
10 - SYNC
SYNC used as SYNC-Telegram.
With Parameter
Operation Mode
1180 the telegram for the synchronisation on the Systembus is de-
termined.
The selected telegram is used
−
for the synchronisation of the operating system (if Parameter
OS_SyncSource
1452 is set to "Sys-
tembus") and
−
for the processing of the synchronous PDOs on the Systembus (if set in Parameters 930, 932, 934,
936-938).
1451 CANopen OS Synctime
Parameter
CANopen OS Synctime
1451 can be used to shift the point of the synchronization inside
of 1 ms. When you experience noises from a motor, shifting the
CANopen OS Synctime can result in a
better behavior.
OS SyncSource Act
1453 shows the active Synchronization source.
Parameter
Setting
No.
Description
Min.
Max.
Fact. sett.
1451 CANopen OS Synctime
700 us
900 us
800 us
For the CANopen Synchronisation pay also attention to Objects
0x1005/0 COB-ID SYNC Message
,
0x1006/0 Communication Cycle Period
and
0x1007/0 Synchronous Window Length
.
For the VPlus Scope Function the following sources are available for diagnosis:
Operation Mode
Function
731 - B: Sync. OS <-> Sysbus Ok
1 = Synchronization OS to Systembus OK,
0 = Synchronization OS to Systembus not OK
852-
SysBus SYNC time [us]
Shows the Synchronization cycle. Should show the
set SYNC time or TxPDO time of the sending master.
853
SysBus SYNC position 1ms Task [us]
Shows the Synchronization time inside 1 ms. Should
remain constant with small fluctuations.
854- B: Sync. OS <-> CANopen Ok
1 = Synchronization OS to CANopen OK,
0 = Synchronization OS to CANopen not OK
848-
CANopen SYNC time [us]
Shows the Synchronization cycle. Should show the
set SYNC time of object
0x1006
.
849- CANopen SYNC position 1 ms Task [us] Shows the Synchronization time inside 1 ms. Should
remain constant with small fluctuations.
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