Display elements
Table 3
Faults
If a unit is defective or there is a wiring error, all the outputs in the affected I/O-
Group are switched off and the I/O-Group switches to a STOP condition. An error
telegram is then sent to SafetyBUS p and the error is entered in the error buffer
of the controlling PSS.
An error message appears on the display of the controlling PSS. The error stack
display in the programming device and the display elements on the PSS SB
ACTIVE JUNCTION BASIS or PSS SB ACTIVE JUNCTION EXPANSION can be
used to locate the error.
LED
POWER
sub branch 1
sub branch 2
Signal
Lights green
Flickers green
Lights red
Lights green
Lights red
Flickers green
Lights red
Lights green
Lights red
Key
Supply voltage present (screw connector
X0)
Data traffic in
sub branch 1
Signal error in sub branch 1
(permanent dominant signal level)
Supply voltage present in sub branch 1
(screw connector X1)
Short circuit in supply voltage sub branch 1
Data traffic in
sub branch 2
Signal error in sub branch 2
(permanent dominant signal level)
Supply voltage present in sub branch 2
(screw connector X2)
Short circuit in supply voltage sub branch 2
Traffic
Supply
Traffic
Supply
