12
107031-33-EN FR26 GLO 1101 Printed in France
2.5.3
Test Indicator (emitter)
red
Test
Normal
operation
red
Test
Test mode
FF-SYA Series light curtains provide a connection for testing the state of external contacts in case of long machine working
cycle. The test contact allows verification of external safety-related electromechanical components before each machine cycle.
When the contact in the external test circuit opens, the FF-SYA Series light curtains switches to the alarm state. The red test
indicator turns on and the fail safe static outputs remain open while the test circuit is open.
The customer is responsible for providing the external test circuitry (
See
Electrical Connections
).
Figure 2-10 Receiver Indicators
signal strength indicator
(yellow)
cross-talk indicator
(red)
operation status
indicators (red and
green)
2.5.4
Operation Indicators (receiver)
Outputs are
closed
green
red
OFF
ON
green
red
Outputs are
open
OFF
ON
The operation indicators are two green and red LED indicators that provide operation status. The green LED indicates the
receiver operates normally and the sensing field is clear. This indicator must be on to ensure the equipment is working properly
(the red LED will be off). The red LED indicates that the light curtain is in an alarm state. If the sensing field is interrupted, the
FF-SYA Series light curtain will immediately generate a stop signal. In this condition, the green LED will be off.
2.5.5
Signal Strength Indicator (receiver)
yellow
Optimum
signal
yellow
Low signal
yellow
No signal
The signal strength indicator is a yellow indicator which flashes repeatedly if the received light level is lower than the normal
operating level, but is still sufficient for operation. If the received light level drops too low, an alarm state results and the light
curtain generates a stop signal. To prevent unnecessary shutdowns, this indicator will signal the need for cleaning and/or
alignment. This indicator also provides useful indication for beam alignment during the installation step.
2.5.6
Cross-talk indicator (receiver)
red
No cross-talk
red
Cross-talk detection
Operation status indicators (red and green)
Signal strength indicator (yellow)
Cross-talk indicator (red)
F
SYA1
0
F
SYA5
0
F
SYA5
1
F
SYA5
2
F
SYA5
3
F
SYA5
4
F
SYA5
6
F
SYA5
5
F
SYA4
7
F
SYA4
9