IDEC FS1A Controller - Manual (Page 139)

5-98
Muting function
This function adds muting to the connected safety devices.
As shown in Fig. 5-24, this function is comprised of a safety input (I
n
), a muting input (IM
n
), and a
functional output (O
n
). The output of the muting input function is connected to the muting input
(IM
n
).
Fig. 5-24 Muting circuit
Description of operation
The timing is described in Fig. 5-25.
Ⅰ When the muting input is turned ON while the safety input is ON, the OFF status of the
safety input is suspended, and the output remains ON.
Ⅱ When the muting input is turned OFF, muting is canceled and the ON/OFF status of the
safety input is shown by the output.
Ⅲ If muting is not used under the correct conditions, the muting function is disabled and the
ON/OFF status of the safety input is shown by the output.
I
n
IM
n
O
n
Muting monitor time：Max.60s ①
②
Ⅰ Ⅱ Ⅲ Ⅱ Ⅰ Ⅲ
Y
n+m
(Muting lamp output)
②
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Fig. 5-25 Operation timing of the muting function
Error detection function
Muting monitor
When either of the following conditions are satisfied, the SafetyOne disables the muting function.
(1) The muting function continues after the muting monitor time (60 s) is exceeded.
When the muting input (MI
n
) ON status exceeds the muting monitoring time, the muting function is
disabled and the safety input status becomes the output. When the muting input is turned OFF,
the muting monitoring time is reset.
(2) When the safety device to be muted is OFF
When the muting input is turned ON while the safety input to be muted is OFF, the muting function
is disabled.
Note: lamp outputs (Y17, Y20) have diagnostic functions of wire breaking or no connection of an
indicator. When wire breaking or no connection of an indicator, the SafetyOne changes to the
Stop state and displays "5" in the error LED display.
I
n
IM
n
O
ｎ Muting
function
Safety
Input
Muting