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A - 5
Appendices
EtherCAT Communication Unit USER’S MANUAL (I574-E1)
A-2 Communications Response Time
A
A-2 Communications Response Time
The table below lists the communications response time.
Due to the characteristics of EtherCAT, the result will become the same with any node as long as the
communication cycle is the same.
CJ1W-NCx82 Master
NJ501-1x00 Master
Meaning Performance Conditions
Starting time Approx. 10 to 14 ms Time after the inverter is started from the PLC until the
motor produces output
CJ1W-NCx82 When the communication cycle is 250
µs
Data transmitting
time
Write Approx. 17 ms/pc Time needed to write/read inverter parameters from
the PLC
CJ1W-NCx82 When the communication cycle is 250
µs
Read Approx. 17 ms/pc
Meaning Performance Conditions
Starting time Approx. 20 to 30 ms Time after the inverter is started from the PLC until the
motor produces output
CJ1W-NCx82 When the communication cycle is 250
µs
Data transmitting
time
Write Approx. 24 ms/pc Time needed to write/read inverter parameters from
the PLC
CJ1W-NCx82 When the communication cycle is 250
µs
Read Approx. 24 ms/pc
Meaning Performance Conditions
Starting time Approx. 6 to 10 ms Time after the inverter is started from the PLC until the
motor produces output
NJ501-1x00 When the communication cycle is 500 µs
Data transmitting
time
Write Approx. 7 ms/pc Time needed to write/read inverter parameters from
the PLC
NJ501-1x00 When the communication cycle is 500 µs
Read Approx. 6 ms/pc
Meaning Performance Conditions
Starting time Approx. 12 to 20 ms Time after the inverter is started from the PLC until the
motor produces output
NJ501-1x00 When the communication cycle is 500 µs
Data transmitting
time
Write Approx. 12 ms/pc Time needed to write/read inverter parameters from
the PLC
NJ501-1x00 When the communication cycle is 500 µs
Read Approx. 12 ms/pc
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