BECKHOFF ET1100 - Manual (Page 68)

PDI description
III-54 Slave Controller – ET1100 Hardware Description
SOF
DATA Input DATA
t SOF_to_DATA_setup
t
SOF
t SOF_to_DATA_hold
Figure 12: Digital Input: Input data sampled at SOF, I/O can be read in the same frame
LATCH_IN
DATA Input DATA
t
DATA_hold
t
DATA_setup
t
LATCH_IN
t Input_event_delay
Figure 13: Digital Input: Input data sampled with LATCH_IN
OUTVALID
DATA
t DATA_to_OUTVALID
Output DATA
t
OUTVALID
Zero or High-Impedance
t
OE_EXT_to_DATA_invalid
OE_EXT
WD_TRIG
t
WD_TRIG
t
DATA_to_WD_TRIG
t
output_event_delay
Figure 14: Digital Output timing
OUTVALID
DATA Input data
t
BIDIR_DATA_valid
Input data
t
BIDIR_DATA_invalid
t
OUTVALID
Input events
t
BIDIR_event_delay
Output data
t
BIDIR_event_delay
Input events
allowed
Input events
allowed
No input events allowed
Figure 15: Bidirectional Mode timing