4-1-3
Standalone Safety Control System
The section describes the relationships of the Safety CPU Unit, EtherNet/IP Coupler Unit, and a stand-
ard CPU Unit within the system, and provides details on communications between the Units based on
the following figure.
Standard process
data communications
Standard
CPU Unit
Communications
Coupler Unit
(A)
(B)
(C)
Safety control system
Safety CPU
Unit
Safety I/O
Unit
Standard I/O
Unit
Safety
process data
communications
The safety control system consists of the Safety CPU Unit, Safety I/O Units, and standard I/O Units.
The Safety CPU Unit performs safety controls with Safety I/O Units through "safety process data
communications". (Section (A) in the above figure.)
The Safety CPU Unit, Safety I/O Units and standard I/O Units can perform standard I/O with the Com-
munications Coupler Unit through "standard process data communications". (Section (B) in the above
figure.)
The standard CPU Unit can indirectly monitor the operating status of the safety control system through
"standard process data communications" when the Communications Coupler Unit is connected. (Sec-
tion (C) in the above figure.)
Relationship between Master and Slaves during Safety Process Da-
ta Communications
The relationships for safety process data communications are shown in the following figure.
Safety Control System
Standard
CPU Unit
Safety process data communications
Safety master
Safety slave
EtherNet/IP
S
S
S
M
M
S
S
M
Safety
CPU
Unit
Coupler
Unit
Safety Output
Safety Input
Safety
CPU
Unit
Coupler
Unit
Safety Output
Safety Input
4 Safety Control Unit Operation
4 - 6
NX-series Safety Control Unit User's Manual (Z930)
Summary of Contents for NX-SIH400
Page 4: ...Introduction 2 NX series Safety Control Unit User s Manual Z930 ...
Page 46: ...Revision History 44 NX series Safety Control Unit User s Manual Z930 ...
Page 108: ...2 Specifications 2 42 NX series Safety Control Unit User s Manual Z930 ...
Page 132: ...3 Installation and Wiring 3 24 NX series Safety Control Unit User s Manual Z930 ...
Page 148: ...4 Safety Control Unit Operation 4 16 NX series Safety Control Unit User s Manual Z930 ...
Page 216: ...5 System Configuration and Setup 5 44 NX series Safety Control Unit User s Manual Z930 ...
Page 306: ...6 Programming 6 90 NX series Safety Control Unit User s Manual Z930 ...
Page 390: ...8 Calculating Safety Reaction Times 8 12 NX series Safety Control Unit User s Manual Z930 ...
Page 412: ...11 Safety Data Logging 11 10 NX series Safety Control Unit User s Manual Z930 ...
Page 504: ...12 Troubleshooting 12 92 NX series Safety Control Unit User s Manual Z930 ...
Page 554: ...l I O Map Settings Appendices A 42 NX series Safety Control Unit User s Manual Z930 ...
Page 623: ...I Index I 1 NX series Safety Control Unit User s Manual Z930 I ...
Page 625: ......