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Test Mode Section 5-1
5-1 Test Mode
Each branch output's connection status can be checked and the outputs can
be connected manually in Test Mode before starting actual operation of the
equipment.
The S8M must be set to protection level 0 or 1 in order to switch to Test Mode.
(It is not possible to switch to Test Mode when the S8M is set to protection
level 2.)
Precautions when
Checking Operation
Before checking operation in Test Mode, always verify that it is safe to do so
and will not adversely affect the system.
Setting the Branch
Outputs That Will Be
Used
When the S8M is shipped from the factory, all branch outputs are discon-
nected, so the outputs will not start connecting when the power is first turned
ON.
After setting the parameters in Setting Mode, switch to Test Mode, connect the
branch outputs that will be used, and then switch to Run Mode.
• The settings will not be saved if the power is turned OFF while the S8M is
still in Test Mode. The S8M will restart in Test Mode and all branch out-
puts will be disconnected.
• If any branch outputs are disconnected when the S8M is switched from
Test Mode to Run Mode, those outputs will remain disconnected.
Errors Occurring
During the
Connection Test
When an error occurs in Test Mode or the external tripping input is turned ON,
the tripping operation will be executed and the appropriate external output will
be turned OFF, but the error code will not be displayed. The errors cannot be
cleared with the Reset Key.
When the S8M is switched to Run Mode, the error code will be displayed and
it will be possible to clear the error with the Reset Key.
Switching to Test
Mode
After setting the parameters in Setting Mode, press the Up Key ( ) and
Down Key ( ) together for at least 3 s to switch to the Mode Selection Menu
and select Test Mode.
Once the S8M has been switched to Run Mode, it will start in either Run Mode
or Test Mode (see note 1) the next time that the power is turned ON, so press
the Up and Down Keys together for 3 s to switch to the Mode Selection Menu
(see note 2).
Note (1) When the S8M is turned OFF in Test Mode, it will restart in Test Mode.
(2) If no keys are pressed for 5 s while the Mode Selection Menu is displayed,
the S8M will automatically switch to Run Mode (Setting Mode if the S8M
is being used for the first time).
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