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G9SP-series Controllers Section 2-1
Diagnosis
The parameter determines whether test pulse evaluation is used. The errors
that can be detected are determined by the setting of this parameter.
Precautions for Correct Use
• Disconnections can be detected by using the EDM function block.
• It the parameter is set to Diagnosis, OFF pulse signals with a pulse width of
640 µs will be output when the Safety Output is ON to diagnose the output
circuit. Check the input response time of the connected control device to
make sure it will not malfunction due to these OFF pulses.
Dual Channel Mode Setting
The G9SP-series Controller can use Safety Outputs in a Dual Channel Mode.
The following actions will be performed if a Dual Channel Mode is set:
• An error will occur if the two outputs from the user program are not equiv-
alent.
• If an error is detected in either of the two output terminals, the outputs to
the external devices are both turned OFF.
This function is achieved with the following parameter.
• Single/Dual Setting
Single/Dual Setting
Channel
mode
Description
of operation
Fault Mode
Contact with positive
side of power line
Ground faults Short circuits in output wiring
Output ON Output
OFF
Output ON Output
OFF
Short
circuit
when both
outputs
are ON
Short
circuit
when both
outputs
are OFF
Short
circuit
when one
output is
ON and the
other is
OFF
No Diag-
nosis
Test pulses
are not output
when the out-
put is ON.
Not detect-
able
Detectable Detectable Not detect-
able
Not detect-
able
Not detect-
able
Detectable
Diagnosis Test pulses
are output
when the out-
put is ON.
Detectable Detectable Detectable Not detect-
able
Detectable Not detect-
able
Detectable
Setting Description
Single channel The Safety Output terminals are used as independent Safety
Input terminals.
Dual channel equiva-
lent
The pair of Safety Output terminals are used as Dual Channel
outputs. The outputs will turn ON if the paired Safety Outputs
are both normal.
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