Omron NX-EIC202 - Page 254

10 I/O Refreshing
10 - 6
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
 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 = 1.5 ms
T
rt_in
: EtherNet/IP Coupler’s communication time (input)
T
plc
: PLC cycle time
T
rt_out
: EtherNet/IP Coupler’s communication time (output)
T
nxb_cycle
: NX bus communication time = 1.5 ms
T
out
: NX Output Unit switching response time
PLC
EtherNet/IP
EtherNet/IP
Coupler Unit
NX Input Unit
NX Output Unit
T
in
T
nxb_cycle
= 1.5 ms
T
out
T
nxb_cycle
= 1.5 ms
T
plc
T
rt_in
T
rt_out
T
min