Hitachi SJ Series, User Manual

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Chapter 21 Technical Notes
21.4.6 Timing Diagram
The following shows the timing diagram of output to the
motor and output of EDM signals for STO inputs
ST1/ST2.

Timing Diagram
21.4.7 Status Indication Function
By setting parameters described in the table below, you
can STO input status on the control panel screen.
You can also check the status by checking the monitor
parameter [dA-45].

Parameters related to STO function indication
Item Parameter Data Description
STO input indication
selection [bd-01] 00
If input of both ST1 and ST2 is STO (input contact point is OFF), ”STO” is shown on
the control panel screen.
01 Also if input of both ST1 and ST2 is STO (input contact point is
OFF), ”STO” is not
shown on the control panel.
02 If input of both ST1 and ST2 is STO (input contact point is OFF), [E090] error occurs.
* Even if either ST1 and ST2 is set to STO, [E090] error does not occur.
STO allowable input
switch time [bd-02] 0.00~
60.00 (s)
Set the allowable time during which input status of ST1 and ST2 is different (e.g., input
contact point: ST1=ON, ST2=OFF).
If there is a difference between the switching time of ST1 and that of ST2, set the
maximum allowable time the difference can be generated.
If it is set to 0.00, the determination of allowable time becomes invalid.
STO indication
selection within
allowable input time [bd-03] 00 Displays a warning at the time difference of status occurs between ST1 and ST2 until
the STO allowable input switch time configured in [bd-02] has elapsed.
01 Does not display a warning at the time difference of status occurs between ST1 and
ST2 until the STO allowable input switch time configured in [bd-02] has elapsed.
STO operation
selection after
allowable input time [bd-04] 00 Displays a warning after the STO allowable input switch time configured in [bd-02] has
elapsed.
01 Does not display a warning after the STO allowable input switch time configured in
[bd-02] has elapsed.
02 After the STO allowable input switch time configured in [bd-02] has elapsed, [E092] or
[E093] error occurs.
ST1
ST2
Output to
the motor
EDM
Output Off
ON
ON
OFF
OFF
ON OFF
10ms