ABB AC500 V3 - 1.7.4.2.8 Diagnosis

Name Value Internal
value
Internal value,
type
Default
Behaviour DO at
comm. error
1
)
Off
Last value
Last value 5 sec
Last value 10 sec
Substitute value
Substitute value 5
sec
Substitute value 10
sec
0
1
6
11
2
7
12
BYTE Off
0x00
Substitute value
at output
0 ... 65535 0000h ...
FFFFh
WORD 0
0x0000
Preventive
voltage feedback
monitoring for
DC0..DC7
2
)
Off
On
0
1
BYTE Off
0x00
Detect voltage
overflow at out-
puts
3
)
Off
On
0
1
BYTE Off
0x00
Remarks:
1
)
The parameter Behaviour DO at comm. error is apply to DC and DO
channels and only analyzed if the Failsafe-mode is ON.
2
)
The state "externally voltage detected" appears, if the output of a
channel DC0...DC7 should be switched on while an externally voltage
is connected. In this case the start up is disabled, as long as the exter-
nally voltage is connected. The monitoring of this state and the resulting
diagnosis message can be disabled by setting the parameters to "OFF".
3
)
The error state "voltage overflow at outputs" appears, if externally
voltage at digital outputs DC0...DC7 and accordingly DO8...DO15 has
exceeded the process supply voltage UP3 Ä Chapter 1.7.4.2.3 “Connec-
tions” on page 771 (see description in section). The according diagnosis
message "Voltage overflow on outputs " can be disabled by setting the
parameters on "OFF". This parameter should only be disabled in excep-
tional cases for voltage overflow may produce reverse voltage.
1.7.4.2.8 Diagnosis
Structure of the Diagnosis Block
Device specifications
Communication interface modules (S500) > Modbus
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