Omron PROFINET NX-PNC202, User Manual

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10 - 5
10 I/O Refreshing
NX-series PROFINET Coupler Unit User’s Manual (W623)
10-2 Com
munications Perform
ance
10
10-2-1 I/O Response
Tim
e

Maximum I/O Response Time
The maximum I/O response time (T
max
) can be calculated with the following formula.
T
max
= T
in
+ (T
nxb_cycle
x 5) + (T
rm
x 4) + (T
plc
x 2) + T
out
T
in
: NX Input Unit switching response time
3 x T
nxb_cycle
: NX bus communication time
2 x T
rm
: PROFINET communication period
2 x T
plc
: PLC cycle time
2 x T
rm
: PROFINET communication period
2 x T
nxb_cycle
: NX bus communication time
T
out
: NX Output Unit switching response time
T
nxb_cycle
T
max
T
in
T
rm
T
rm
T
rm
T
rm
T
plc
T
plc
T
out
PLC
PROFINET
PROFINET
Coupler Unit
NX Input Unit
NX Output Unit
T
nxb_cycle
T
nxb_cycle
T
nxb_cycle
T
nxb_cycle