35 BASIC CONCEPT
35.10 Running a Safety Program
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35
SIL2 Process CPU operating status
The following is a list of SIL2 Process CPU operating statuses.
• RUN state
•STOP state
• PAUSE state
Operation processing based on SIL2 Process CPU operating status
Operation processing based on the SIL2 Process CPU operating status is the same as that of the standard CPU. ( Page
87 Operation Processing by Operating Status)
■Safety communications processing based on SIL2 Process CPU operating status
The following table shows safety communications processing based on the SIL2 Process CPU operating status.
*1 If the safety operation mode is TEST MODE, output is based on the output hold and clear settings when the status of network modules
(RJ71GF11-T2) for which safety communication settings are specified is CPU STOP. ( Manual for network module used)
*2 Safety communications are not performed if a stop error occurs at the SIL2 Process CPU.
■Operation processing when operating status of the SIL2 Process CPU changes
The following table shows operation processing in the safety program when the operating status of the SIL2 Process CPU is
changed.
*1 Assignment device data for standard/safety shared labels is processed in the same way as operation processing with standard
programs.
*2 Values for safety devices when the SIL2 Process CPU operating status changes are cleared or turn off, regardless of the safety
operation mode.
*3 If the safety operation mode is TEST MODE, output is based on the output hold and clear settings when the status of network modules
(RJ71GF11-T2) for which safety communication settings are specified is CPU STOP. ( Manual for network module used)
Operation processing with standard programs is the same as the following.
Page 88 Operation Processing When Operating Status Is Changed
SIL2 Process CPU operating status Safety communications processing
RUN state Executes the set safety communications.
STOP state Executes the set safety communications, however, send data is turned off (0).
*1*2
PAUSE state Executes the set safety communications, however, send data is turned off (0).
*1
SIL2 Process
CPU operating
status
SIL2 Process CPU processing
Safety program External output Safety device data
*1
Other than SA\Y SA\Y
STOP RUN Executes safety programs. Outputs the value after safety
program execution.
Retains the safety device data
status immediately before the
RUN state. Clears safety local
devices.
Retains the SA\Y value
immediately before the RUN
state.
RUN STOP Executes up to the END
instruction and then stops.
Turns off all safety
communication outputs.
*3
Retains the device data status
immediately before the STOP
state.
Turns off all SA\Y values.
*2
RUN PAUSE Stops operation after the
execution of one scan.
Turns off all safety
communication outputs.
*3
Retains the device memory
status immediately before the
PAUSE state.
Turns off all SA\Y values.
*2
PAUSE RUN Executes the program from the
start.
Outputs the value after safety
program execution.
Retains the device data status
immediately before the RUN
state. Clears safety local
devices.
*2
Retains the device data status
immediately before the RUN
state.
PAUSE STOP Operation remains stopped. All safety communication
outputs remain off.
*3
Retains the device data status
immediately before the STOP
state.
Retains the SA\Y value
immediately before the STOP
state.
STOP PAUSE Operation remains stopped. All safety communication
outputs remain off.
*3
Retains the device data status
immediately before the PAUSE
state.
Retains the SA\Y value
immediately before the PAUSE
state.
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