![Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual Download Page 561](http://html.mh-extra.com/html/mitsubishi-electric/melsec-iq-r-r00cpu/melsec-iq-r-r00cpu_user-manual_239139561.webp)
34 SAFETY DEVICES, SAFETY LABELS, AND CONSTANTS
34.4 Safety Label
559
34
34.4
Safety Label
A label used in safety programs is called a safety label. Information not described in this section is same as that of standard
labels. (
Safety label types
There are three safety label types. Only the following labels can be used in safety programs.
• Safety global label
*1
• Standard/safety shared label
*2
• Safety local label
*1 Safety devices can be assigned.
*2 Can be used in standard programs and standard function blocks as well.
• An initial value cannot be set for safety labels and standard/safety shared labels.
• Only safety labels can be used as alias source of a safety label. Only standard/safety shared labels can be
used as alias source of a standard/safety shared label. Safety labels and standard/safety shared labels
cannot be used as alias source of a standard label. (
GX Works3 Operating Manual)
How to use standard/safety shared labels
A standard/safety shared label is used to pass device data from a safety program to a standard program, and vice versa.
When a standard/safety shared label is used in a safety program as shown in the examples below, the program needs to be
created so that the safety state is secured.
■
To restart safety control by the command from the GOT
Standard control
Standard control
Safety control
Safety control
Used in a safety control.
Transfer data.
Standard/safety
shared label
Standard/safety
shared label
Standard program
Perform write to turn on M0 from GOT.
Safety program
Create a program in which the safety control processing is set in
a safety program and the standard/safety shared label is used.
Restart processing
SM400
M0
[ SET GOT_OPE ]
GOT_OPE
SA\M0
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
Page 1027: ......