Omron NX-EIC202 - Page 255

10 - 7
10 I/O Refreshing
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
10-2 Communications Performance
10
10-2-1 I/O Response Time
 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
: EtherNet/IP communication period (RPI)
2 x T
plc
: PLC cycle time
2 x T
rm
: EtherNet/IP communication period (RPI)
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
EtherNet/IP
EtherNet/IP
Coupler Unit
NX Input Unit
NX Output Unit
T
nxb_cycle
T
nxb_cycle
T
nxb_cycle
T
nxb_cycle