Aventics INTERBUS S Mode D'emploi page 81

Table 13: S3 mode switch for sending diagnostic messages to the master
1)
Switches Diagnosis
S3.1 Valve driver overload,
digital output overload
S3.2 Low voltage U
S3.3 Low voltage U
S3.4 EMERGENCY OFF U
S3.5 EMERGENCY OFF U
S3.6 Sensor supply overload
S3.7 Diagnostic byte will be
shown in the input image
behind the digital input data.
S3.8 LOW/HIGH byte exchanged
1)
If the switch is ON, the respective diagnostic message will be displayed on the bus.
AVENTICS | INTERBUS S | R412005743–BDL–001–AD
Fig. 8: S3 setting switch on bus coupler
Set the necessary diagnostic messages using the S3 mode
O
switch (see Tab. 13 on page 81 for settings).
The modified switch position will only be activated after a
new "power on".
Notes
The diagnostic message is displayed if a valve or digital
output on an 8DO module reports an overload or short
circuit. This diagnostic message is only displayed as long as
this valve or output is controlled.
In order to ensure safe switching, the switch voltage must
Q1
be 18 V! If the UQ voltage is between 12 V and 18.5 V, the
Q2
voltage is too low.
The low voltage message appears approx. 10 ms after being
turned on and approx. 20 ms after being turned off.
If the voltage drops below < 12 V, an EMERGENCY OFF
Q1
message is triggered.
Q2
Using switch 3.8, transfer of the input and output bytes can
be adjusted to the applied master control.
Commissioning and Operation
81