Omron G9SP-N20S Operation Manuals page 62

G9SP-series Controllers
Functions of Safety Output Terminals
The results of program execution are evaluated by the Safety Output functions
and the evaluation results are output from the Safety Output terminals.
Safety Input Safety Input
terminals functions
Self-diagnosis
Test pulse evaluation
A pulse is output at a specific interval
to detect wiring errors in the
externally connected device.
Dual channel evaluation
When Safety Output terminals
are used as dual channels,
the two outputs are checked
for consistency.
Other Functions
Error notification
Self-diagnosis of Safety Output
terminals provides notification of
the locations and causes of
errors.
Test Pulse Evaluation
36
This section describes the functions of the Safety Output terminals on the
G9SP-series Controller. The following functions are allocated automatically
when the external devices to connect are selected from the G9SP Configura-
tor.
Program Safety Output
execution functions
No diagnosis
Diagnosis
Single channel
There is no redundancy.
Dual channel equivalent
Two outputs are checked to make sure they
have the same value.
Checking with I/O indicators
Yellow indicators show the output is ON and normal. Red indicators show errors.
Checking with the G9SP Configurator
The G9SP Configurator can be used to check error causes (e.g., failure of externally
connected devices and wiring errors, such as short-circuits or ground faults).
Checking with Option Board Communications
The same information that is available on the G9SP Configurator can be sent to a
Standard PLC that is connected through an Option Board.
A test pulse with a specific period is output on the 24-V power line from a
Safety Output Terminal to detect wiring errors. This function is achieved with
the following parameter.
• Diagnosis
Safety Output
terminals
Section 2-1