BECKHOFF ET1200 - Manual (Page 64)

Electrical Specifications and Timings
III-54 Slave Controller – ET1200 Hardware Description
Table 53: Forwarding Delays
Symbol Parameter Min Average Max Units
t
Diff
Average difference processing delay minus
forwarding delay (without RX FIFO jitter)
between any two ports 20 ns
t
EE
EBUS port to EBUS port delay (FIFO size 7):
a) Through ECAT Processing Unit
(processing), Low Jitter off
b) Alongside ECAT Processing Unit
(forwarding), Low Jitter off
c) Through ECAT Processing Unit
(processing), Low Jitter on
d) Alongside ECAT Processing Unit
(forwarding), Low Jitter on a) 140
b) 120
c) 150
d) 130 a) 150
b) 130
c) 155
d) 135 a) 160
b) 140
c) 160
d) 140 ns
t
EM
EBUS port to MII port delay (FIFO size 7):
a) Through ECAT Processing Unit
(processing)
b) Alongside ECAT Processing Unit
(forwarding) a) 145
b) 125 a) 170
b) 150 a) 195
b) 175 ns
t
ME
MII port to EBUS port delay (FIFO size 7):
a) Through ECAT Processing Unit
(processing), Low Jitter off
b) Alongside ECAT Processing Unit
(forwarding), Low Jitter off
c) Through ECAT Processing Unit
(processing), Low Jitter on
d) Alongside ECAT Processing Unit
(forwarding), Low Jitter on a) 255
b) 235
c) 265
d) 245 a) 280
b) 260
c) 290
d) 270 a) 305
b) 285
c) 315
d) 295 ns
t
MM
MII port to MII port delay
(FIFO size 7, TX Shift=00):
Through ECAT Processing Unit (processing) 280 305 335 ns
NOTE: Average timings are used for DC calculations.