ABB AC500 PLC - Diagnosis

Table 85: Channel Configuration
Internal value Operating modes of the analog outputs, individually configurable
0 (default) Not used
128 -10 V...+10 V
129 0 mA...20 mA
130 4 mA...20 mA
Table 86: Channel monitoring
Internal value Check channel
0 Plausib(ility), cut wire, short circuit
3 None
Table 87: Substitute Value
Intended behavior of output
channel when the control
system stops
Required setting of the
module parameter
"Behavior of outputs in
case of a communication
error"
Required setting of the
channel parameter "Substi-
tute value"
Output OFF Off 0
Last value infinite Last value 0
Last value for 5 s and then
turn off
Last value 5 sec 0
Last value for 10 s and then
turn off
Last value 10 sec 0
Substitute value infinite Substitute value Depending on configuration
Substitute value for 5 s and
then turn off
Substitute value 5 sec Depending on configuration
Substitute value for 10 s and
then turn off
Substitute value 10 sec Depending on configuration
Diagnosis
In cases of short circuit or overload, the digital outputs are turned off. The module performs
reactivation automatically. Thus an acknowledgement of the errors is not necessary. The error
message is stored via the LED.
Device Specifications
I/O Modules > Digital/Analog I/O Modules
2019/04/17 3ADR010121, 13, en_US 589