IDEC FS1A Controller - Manual (Page 270)

LOGIC
5-222
Logic 14b: Partial stop logic applicable for selection of active safety input
devices
Overview (Logic 14b)
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 single channel outputs.
This logic enables the connection of 3 dual channel direct opening inputs, 1 mode select input, and 1
dual channel dependent input.
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1 Safety input 4
Safety input 5
Safety output 3
Safety
output 2
System runs
System runs
System
stops
C
Logic 14b
Emergency
stop switch
Safety switch
Enabling switch
Selector switch
Safety
output 1-1
Safety
output 2
Safety
output 1-2
Safety
output 3
Operation example (Logic 14b)
●Auto mode
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 4
Safety input 5
Safety output 3
Safety
output 2
System runs
System
runs
System runs
Inactive
Open!
Open!
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 4
Safety input 5
Safety output 3
System runs
Inactive
System stops
Safety
output 2
System
stops
●Teach mode
Position1!
Position3!
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 4
Safety input 5
Safety output 3
Safety
output 2
System
stops
System stops
System runs
Inactive
Inactive
Position 2!
Auto mode Teach mode
Safety input 1
Safety input 2
Safety input 3
Safety output 1
Safety input 4
Safety input 5
Safety output 3
System stops
System stops
Inactive
Inactive
Safety
output 2
System
stops
Press!