Omron PROFINET NX-PNC202, User Manual

Page: 190 / 282

10 I/O Refreshing
10 - 4
NX-series PROFINET Coupler Unit User’s Manual (W623)

Minimum I/O Response Time
The minimum I/O response time (T
min
) can be calculated with the following formula.
T
min
= T
in
+ T
nxb_cycle
+ T
rt_in
+ T
plc
+ T
rt_out
+ T
nxb_cycle
+ T
out
T
in
: NX Input Unit switching response time
T
nxb_cycle
: NX bus communication time
T
rt_in
: PROFINET Coupler’s communication time (input)
T
plc
: PLC cycle time
T
rt_out
: PROFINET Coupler’s communication time (output)
T
nxb_cycle
: NX bus communication time
T
out
: NX Output Unit switching response time
PLC
PROFINET
PROFINET
Coupler Unit
NX Input Unit
NX Output Unit
T
in
T
nxb_cycle
T
out
T
nxb_cycle
T
plc
T
rt_in
T
rt_out
T
min