IDEC FS1A Controller - Manual (Page 377)

LOGIC
5-329
Chapter 5
Muting II
This function adds muting to connected safety devices.
As shown in Fig. 5-26, 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. 5-26 Muting II function circuit
Description of operation
The timing is described in Fig. 5-27.
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 Ⅱ Ⅲ Ⅱ Ⅱ
I
n
IM
n+1
O
n
ON
OFF
Y
m
(Monitor output)
ON
OFF
ON
OFF
ON
OFF
Fig. 5-27 Operation timing of the muting function
Error detection function
Muting monitor
When of the following condition is satisfied, the SafetyOne disables the muting function.
●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 in logic 11d. 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
functionⅡ
Safety
Input
Muting
（∞）