Operating Modes Of The Safety Cpu Unit; Startup Operating Mode And Changing The Operating Mode - Omron NX-SID Series User Manual

8-3 Operating Modes of the Safety CPU
Unit
This section describes the operating modes of the Safety CPU Unit, state changes, and the functions
that can be executed in each mode.
8-3-1

Startup Operating Mode and Changing the Operating Mode

The Safety CPU Unit changes to PROGRAM mode or RUN mode after the power is turned ON depend-
ing on whether the safety programs are validated, as shown in the following figure.
 Before Safety Validation
The Safety CPU Unit starts in PROGRAM mode. This prevents the Safety CPU Unit from running a
safety application that has not been validated for safety.
 After Safety Validation
The Safety CPU Unit starts in RUN mode.
To change the operating mode of the Safety CPU Unit, select the Safety CPU Unit as the Controller and
place the Sysmac Studio online with the Safety CPU Unit, and then select the desired operating mode.
Front panel VALID indicator not lit: Safety validation
has not been performed (the safety programs have
not been saved to non-volatile memory).
Online
connection to
(Download from the Sysmac Studio to
Sysmac Studio
is canceled.
Safety validation
(Download from the
Sysmac Studio to the
non-volatile memory).
*1. The Safety CPU Unit can be operated only after safety validation is performed.
*2. When the operating mode changes from PROGRAM mode to DEBUG mode, the safety application data in the non-vol-
atile memory of the Safety CPU Unit is deleted.
NX-series Safety Control Unit User's Manual (Z930)
Power ON
Initializing
Changing to
RUN mode
PROGRAM mode
Changing to PROGRAM
mode
*2
Changing to DEBUG mode
Changing to PROGRAM mode
the main memory).
Debugging started.
DEBUG mode
(STOPPED)
Debugging stopped.
DEBUG mode
8 Checking Operation and Actual Operation
Front panel VALID indicator lit: Safety validation
has been performed (the safety programs have
been saved to non-volatile memory).
*1
RUN mode
Changing to RUN mode
DEBUG mode
(RUN)
Any operating mode
A fatal error occurred.
8
Critical Fault
state
*1
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