Advantech ADAM-5000/ECAT handleiding
Handleiding
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enables consistent and secure data exchanges between the EtherCAT master and the
slaves, generating interrupts to inform both sides of changes to protect data in the
DPRAM from being accessed simultaneously. If the slave uses FMMUs, the
SyncManagers for the corresponding data blocks are located between the DPRAM
and the FMMU.
EtherCAT SyncManagers can operate in two modes:
Mailbox mode
The mailbox mode implements a handshake mechanism for data exchange. EtherCAT
master and slave only get access to the buffer after the other one has finished its
access. When the sender writes the buffer, the buffer is locked for writing until the
receiver has read it out. The mailbox mode is typically used for parameter settings and
no real-time exchange of data.
Figure 1.10 Mailbox Mode
Buffered Mode
The buffered mode is typically used for cyclic data exchange because the buffered
mode allows access to the communication buffer at any time for both sides, EtherCAT
master and slaves.
Note!
SyncManagers running in buffered mode need three times the process data size
allocated in the DPRAM.
Note!
If the buffer is written faster than it is read out by the receiver, old data is dropped.
Thus, the receiver always gets the latest consistent buffer content which was written by
the sender.
Chapter 1 Understanding Your System
15
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Productinformatie
| Merk | Advantech |
| Model | ADAM-5000/ECAT |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 22504 MB |
