IDEC FS1A Controller - Manual (Page 383)

LOGIC
5-335
Chapter 5
Safety output with timer
This function is for controlling the safety output with OFF delay timer.
As shown in Fig. 5-35, this function is comprised of a hold input (O
n
), an EDM input (I
n
), and a
safety output (Y
n
). The function output of external device monitoring input function is connected to
the EDM input (I
n
).
Fig. 5-35 Safety output with timer function circuit
Connects to
Equipment with force guided mechanisms, such as, contactors, safety relays.
Input of safety PLC, or other safety controllers.
Description of operation
The operation timing is described in Fig. 5-36 and 5-37.
I When hold input is turned ON, the safety output is turned ON after confirmation that the EDM
input is ON.
II When hold input is turned OFF, the safety output is turned OFF.
III When the OFF-delay timer is set, after the hold input is turned OFF, the safety output is
turned OFF after the set time of the OFF-delay timer. However, the monitor outputs for
safety outputs are turned OFF immediately after the hold input is turned OFF regardless of
the set time of the OFF-delay timer.
IV If the EDM input is not applied correctly (ON state of EDM input is not detected during EDM
monitoring time (1s) after hold input is turned ON, ON state of EDM input is not detected
during EDM monitoring time (1s) after safety output turns OFF, or ON state of EDM input is
not detected during EDM monitoring time (1s) after EDM input turns OFF due to the error
during safety output is OFF state), the SafetyOne changes to the Protection state, and
indicates “1” on the error LED without turning ON the safety output. (See Fig. 5-37.)
O
n
I
n
Y
ｎ
V-
Ex. Contactor, safety relay
Hold
EDM
OSSD
with
OFF delay