IDEC FS1A Controller - Manual (Page 344)

LOGIC
5-296
Logic 108: Partial stop logic applicable for selection of active safety input
devices in apparatus with openings
Overview (Logic 108)
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, the logic described is
applicable to the mode selection between teach mode (maintenance mode) and the auto mode
(operating mode). Safety outputs perform as single channel outputs.
This logic enables the connection of 2 dual channel direct opening inputs, 1 mode select input, 1
dual channel dependent input, and 1 dual channel safety input.
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 5
Safety output 2
Safety input 4
System runs
System runs
Logic 108
Safety
output 1-1
Safety
output 1-2
Safety
output 2-2
Safety
output 2-1
Emergency
stop switch
Safety switch
Enabling switch
Selector switch
Safety light
curtain
(PNP type)
Operation example (Logic 108)
●Auto mode
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 5
Safety output 2
Safety input 4
System stops
System runs
Inactive
Beams
blocked!
Press! Open!
Auto mode Teach mode
Safety input 1
Safety input 3
Safety output 1
Safety input 5
Safety output 2
Safety input 4
System stops
System stops
Safety input 2
Inactive
●Teach mode
Position 2!
Safety input 3
Safety output 1
Safety input 5
Safety output 2
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 4
Inactive
System runs
System stops
Beams
blocked!
Position 1!
Position 3!
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 5
Safety output 2
Safety input 4
Inactive
System stops
System stops
Press!