Restrictions In Debug Mode; Operation When Changing Operating Mode - Omron NX-SID Series User Manual

8 Checking Operation and Actual Operation
8-3-2

Restrictions in DEBUG Mode

Safety certification bodies prohibit safety controllers from entering full operational state while forced
refreshing is enabled. Therefore, the Safety CPU Unit imposes the following restrictions.
• You can perform forced refreshing only in DEBUG mode.
• You can change to DEBUG mode only when the Sysmac Studio is online with the Safety CPU
Unit. If an online connection is broken in DEBUG mode, the Safety CPU Unit will automatically
change to PROGRAM mode after 30 seconds elapses.
• Only one copy of the Sysmac Studio can go online with the Safety CPU Unit at the same time.
8-3-3

Operation when Changing Operating Mode

If you change the operating mode of the Safety CPU Unit, the Safety CPU Unit will operate as shown in
the following table.
Before
change
PROGRAM
mode
PROGRAM
mode
DEBUG mode
(STOPPED)
DEBUG mode
(RUN)
RUN mode
DEBUG mode
(RUN)
DEBUG mode
(STOPPED)
Any operating
mode
8 - 14
→
After change
→
DEBUG mode • Safety process data communications started.
(STOPPED)
→
RUN mode • Safety process data communications started.
• The variables are initialized and the safety programs are executed
from the beginning.
→ DEBUG mode • Safety process data communications continue.
(RUN)
• The variables are initialized and the safety programs are executed
from the beginning.
→
DEBUG mode • Safety process data communications continue.
(STOPPED)
• The variables are initialized and the safety programs are stopped.
• The forced status of variables is cleared.
→
PROGRAM • Safety process data communications stop.
mode
The safety input data from the Safety Input Units is initialized to 0.
The safety output data to the Safety Output Units is initialized to 0.
• The variables are initialized and the safety programs are stopped.
• The safety programs are deleted from the non-volatile memory of the
Safety CPU Unit.
→
PROGRAM • Safety process data communications stop.
mode
The safety input data from the Safety Input Units is initialized to 0.
The safety output data to the Safety Output Units is initialized to 0.
• The variables are initialized and the safety programs are stopped.
• The forced status of variables is cleared.
→
PROGRAM • Safety process data communications stop.
mode
The safety input data from the Safety Input Units is initialized to 0.
The safety output data to the Safety Output Units is initialized to 0.
→
Critical Fault • Safety process data communications stop.
state
• The safety programs are stopped.
• Message communications are stopped.
• All safety output data is initialized to 0.
Operation
NX-series Safety Control Unit User's Manual (Z930)