BECKHOFF EtherCAT Registers Section II - Manual (Page 71)

SyncManager (0x0800:0x087F)
Slave Controller – Register Description II-59
Table 93: Register Activate SyncManager y (0x0806+y*8)
ESC20 ET1100 ET1200 IP Core
[7:6]
(w ack) (w ack)
[7:6]
(w ack)
Bit Description ECAT PDI Reset Value
0 SyncManager Enable/Disable:
0:
Disable: Access to Memory without
SyncManager control
1: Enable: SyncManager is active and
controls Memory area set in
configuration
r/w r/
(w ack)* 0
1 Repeat Request:
A toggle of Repeat Request means that a
mailbox retry is needed (primarily used in
conjunction with ECAT Read Mailbox) r/w r/
(w ack)* 0
5:2 Reserved, write 0 r/- r/
(w ack)* 0
6 Latch Event ECAT:
0:
No
1: Generate Latch event if EtherCAT
master issues a buffer exchange
r/w r/
(w ack)* 0
7 Latch Event PDI:
0:
No
1: Generate Latch events if PDI issues a
buffer exchange or if PDI accesses
buffer start address
r/w r/
(w ack)* 0
* PDI register function acknowledge by Write command is disabled: Reading this register from PDI in all
SyncManagers which have changed activation clears AL Event Request 0x0220[4]. Writing to this register from
PDI is not possible.
PDI register function acknowledge by Write command is enabled: Writing this register from PDI in all
SyncManagers which have changed activation clears AL Event Request 0x0220[4]. Writing to this register from
PDI is possible; write value is ignored (write 0).