IDEC FS1A Controller - Manual (Page 204)

LOGIC
5-156
Logic 13b: The logic constructing an OR circuit applicable for selection of
active safety input devices
Overview (Logic 13b)
For production machines, robots, and the like, a hazard is generally isolated by a protective door
(guard); however, when performing teaching or maintenance, the machine is operated in the
condition that a person is in the danger zone. For such a situation, this logic described is applicable
to the mode selection between Teach mode (maintenance mode) and Auto mode (operating mode).
Safety outputs perform as dual channel outputs.
This logic enables constructing an OR circuit in Auto mode (operating mode).
This logic enables the connection of 2 dual channel direct opening inputs, 1 mode select input, 1
dual channel dependent input, 2 dual channel safety inputs.
Workspace
Auto mode Teach mode
Safety input 1
Safety input 6
Safety input 2
Safety input 3
Safety input 4
Safety input 5
Safety output 1
or
Safety output 2
System runs
(PNP type)
Logic 13b
Safety light
curtain
Emergency
stop switch
Safety switch
Enabling switch
Selector switch
Safety
output 1
Safety
output 2