Omron NX-SID800 User Manual

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Appendix
NX-series Safety Control Unit User’s Manual (Z930)
A-11 I/O Response Times for Communica-
tions between NX Units on EtherNet/IP Slave
A
A-11 I/O Response Times for Communica-
tions between NX Units on Ether-
Net/IP Slave Terminals
This section describes the input response times and output response times for communications
between NX Units on EtherNet/IP Slave Terminals.
The input response time gives the time required from when an external signal is input to the NX Unit
until it is processed by the Safety CPU Unit.
The maximum input response time is calculated as follows:
The elements in the formulas are as follows:
• Safety task period: Setting of the safety task period in the Safety CPU Unit
• Tnx-Indelay: Input delay time of the NX Unit
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:
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
This section defines the elements and describes the calculation methods.
 Tnx-Indelay
This is the input delay time of the NX Unit. It is the time required to read the status of the input termi-
nals into NX Unit memory. There is a unique value for each type of NX Unit.
The NX Unit input delay time is different for each type of NX Unit. The following table gives the defi-
nition of the input delay time for each type of NX Unit.
Input Response Times
Formula: Maximum input response time = Safety task period + Tnx-Indelay + 4.5 ms
Output Response Times
Formula: Maximum output response time = Safety task period + Tnx-OutProc + Tnx-Outdelay + 4.5 ms
Definition of Formula Elements and Calculation Methods
Type of NX Unit Tnx-Indelay Remarks
Digital Input Units ON/OFF response
time + Input filter time
The ON/OFF response time depends on the model of the Unit.
You can set the input filter time for each Unit.

Omron NX-SID800 Specifications

General

Brand	Omron
Model	NX-SID800
Category	Controller
Language	English