ABB PSTX Series Installation And Commissioning Manual page 111

7.17.21 Fieldbus failure protection
This protection senses errors in Fieldbus communication
between the Softstarter and the PLC.
If the Fieldbus control is ON and the Fieldbus
communication is lost approximately 100 ms this
protection is on.
This protection has a special action in addition to the
common types of operation:
Change to I/O control.
With the Change to I/O control set to enable, the control
of the Softstarter automatically changes from the Fieldbus
to the hard wire inputs when the Fieldbus malfunctions.
When the Fieldbus starts to work again, the control is
automatically switched back to the Fieldbus.
Fieldbus failure protection has these parameters:
Parameter
19.03 Fieldbus failure out
19.04 Fieldbus failure op
7.17.22 Extension I/O failure protection
This protection senses errors in communication between
the Softstarter and the Extension I/O module.
If Com3 function is set to Extension I/O and the
communication to the Extension I/O is lost during the set
trip time this protection is on.
Extension I/O failure protection has these
parameters:
Parameter
19.05 Ext IO failure trip time
19.06 Ext IO failure out
19.07 Ext IO failure op
Description
Identifies the Event groups this
protection is part of.
Sets the operation of this
protection.
Description
Sets the trip time for extension IO
failure protection.
Identifies the Event groups this
protection is part of.
Sets the operation of this
protection.
1SFC132081M0201 | Installation and commissioning manual | Functions
Setting range Default value
Eventgroup 0 ... 6 0000010
Off, Stop-Manual, Stop-Manual
Stop-Automatic,
Indication, Switch to
I/O control
Setting range Default value
300 ... 30000 ms 1000 ms
Eventgroup 0 ... 6 0000010
Off, Stop-Manual, Stop-Manual
Stop-Automatic,
Indication
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