Festo IIFB-02- Series, Manual

Page: 110 / 123

Diagnosis
The following error states are recognized on the
valve terminal/valve sensor terminal and com-
municated to the programmable controller.
In accordance with the RIO protocol, this diag-
nostic information is transmitted as common
error to the programmable controller where it can
be analysed with the status bits.
Diagnostic
information Meaning Cause
V
valve
(V
val
) Monitors the operating voltage
of valves and additional outputs Operating voltage at pin 2 of
operating voltage
connection< 21.6V
V
output
(V
out
) Monitors the operating voltage
of the valves and
additional outputs
(no voltage, e.g.
EMERGENCY OFF). Operating voltage at pin 2 of
operating voltage
connection < 10V
V
input
(V
inp
) Monitors the operating voltage
of the inputs/sensors with
valve sensor terminals Operating voltage of
sensors < 10V at pin 1
(e.g. internal fuse triggered)
SA0 Monitors additional output
O0.00 of valve sensor
terminal Short circuit or overload
SA1 Monitors additional output
O0.01 of valve sensor
terminal Short circuit or overload
Fig. 6/5: Error status of valve terminal/valve sensor terminal
VIFB8 – 02 6. Diagnosis/error treatment
9706
6-7