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APPENDICES

Appendix 4 Restrictions on Using MELSECNET/H Module in the Safety

CPU Module

App - 23

Device Explanation

CPU Module Processing

Time

Procedure for Writing

Program to CPU ModuleAppendices

Index

(2) Function of MELSECNET/H network system that can be used in the

safety CPU module

The function of MELSECNET/H network system and the function which can be used

in the safety CPU module are shown in TableApp.20.

: used,

: unused

TableApp.20 Function of MELSECNET/H network system and its availability in the safety CPU module

Function Use permitted/prohibited

Cyclic transmission function

Communication using LB/LW

Communication using LX/LY

MELSECNET/H extended mode

Refresh parameter

Common parameter

Station inherent parameter

Inter-link data transfer function

Designation of reserved station

Low-speed cyclic transmission function

Redundant system function

Transient transmission function

Communication function

Routing function

Group function

Message transmission function using logical channel numbers

Data sending/receiving (SEND/RECV)

Other station word device read/write (READ/SREAD/WRITE/SWRITE)

Other station transient request (REQ)

Other station word device read/write (ZNRD/ZNWR)

Remote RUN/Remote STOP (RRUN/RSTOP)

Reading and writing other station CPU module's clock data (RTMRD/

RTMWR)

RAS function

Automatic return function

Control station switch function

Control station return control function

Loopback function (optical loop system)

Prevention of station failure by using external power supply (Optical

loop system)

Station detach function (coaxial bus system)

Transient transmission enabled even at CPU module error

Checking transient transmission abnormal detection time

Diagnostic function

Direct access to link devices

Starting interrupt sequence program

Multiplex transmission function (optical loop system)

Simple dual-structured network

Stopping/restarting of cyclic transmission and stopping link refresh (network test)

Increasing number of send points by installing multiple modules with the same network number

Multiple CPU system supported

Remote I/O network system.

Redundant system supported

Network diagnostic (line monitor)

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