Omron sysmac NX Series User Manual page 966

Appendices
Formula: Maximum input response time = Tnx-InProc x 2 + Tnx-Indelay + 3.75 ms + Safety task period
The elements in the formulas are as follows:
• Safety task period: Setting of the safety task period in the Safety CPU Unit
• Tnx-InProc: Input data processing time of the NX Unit
• Tnx-Indelay: Output delay time of the NX Unit
Output Response Times
The output response time is the time from data processing on the Safety CPU Unit until the results are
externally output from an NX Unit.
The maximum output response time is calculated as follows:
Formula: Maximum output response time = Tnx-OutProc x 2 + Tnx-Outdelay + 3.75 ms + Safety task period
The elements in the formulas are as follows:
• Safety task period: Setting of the safety task period in the Safety CPU Unit
• Tnx-OutProc: Output data processing time of the NX Unit
• Tnx-Outdelay: Output delay time of the NX Unit
Additional Information
To calculate the I/O response times between a Safety I/O Unit and standard I/O Unit, add the
input response time or output response time to the FSoE watchdog timer value of the Safety I/O
Unit.
A-102
NX-series Safety Control Unit/Communication Control Unit User's Manual (Z395)