BECKHOFF EtherCAT Registers Section II - Manual (Page 51)

AL Event Request (0x0220:0x0223)
Slave Controller – Register Description II-39
3.32 AL Event Request (0x0220:0x0223)
Table 49: Register AL Event Request (0x0220:0x0223)
ESC20 ET1100 ET1200 IP Core
[6:4] [6:5] [6:5] [5:4]
V2.0.0/
V2.00a;
[6]
V2.3.0/
V2.03a
Bit Description ECAT PDI Reset Value
0 AL Control event:
0:
No AL Control Register change
1: AL Control Register has been written
3
(Bit is cleared by reading AL Control register
0x0120:0x0121 from PDI)
r/- r/- 0
1 DC Latch event:
0:
No change on DC Latch Inputs
1: At least one change on DC Latch Inputs
(Bit is cleared by reading DC Latch event
times from PDI, so that Latch 0/1 Status
0x09AE:0x09AF indicates no event. Available
if Latch Unit is PDI controlled)
r/- r/- 0
2 State of DC SYNC0 (if register 0x0151.3=1):
(Bit is cleared by reading SYNC0 status
0x098E from PDI, use only in Acknowledge
mode) r/- r/- 0
3 State of DC SYNC1 (if register 0x0151.7=1):
(Bit is cleared by reading of SYNC1 status
0x098F from PDI, use only in Acknowledge
mode) r/- r/- 0
4 SyncManager activation register
(SyncManager register offset 0x6) changed:
0:
No change in any SyncManager
1: At least one SyncManager changed
(Bit is cleared by reading SyncManager
Activation registers 0x0806 etc. from PDI)
r/- r/- 0
5 EEPROM Emulation:
0:
No command pending
1: EEPROM command pending
(Bit is cleared by acknowledging the
command in EEPROM command register
0x0502 from PDI)
r/- r/- 0
6 Watchdog Process Data:
0:
Has not expired
1: Has expired
(Bit is cleared by reading Watchdog Status
Process Data 0x0440 from PDI)
r/- r/- 0
7 Reserved r/- r/- 0
3
AL control event is only generated if PDI emulation is turned off (PDI Control register 0x0140.8=0)