ABB AC500 PLC - 1.7.6.3.8 Diagnosis

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 externally 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 dig-
ital outputs DC0...DC7 and accordingly DO0...DO7 has exceeded the process
supply voltage UP3 Ä Chapter 1.7.6.3.3 “Electrical Connection” on page 1048
(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 exceptional cases for voltage overflow may produce
reverse voltage.
1.7.6.3.8 Diagnosis
Structure of the Diagnosis Block via PNIO_DEV_ALARM Function Block.
Byte Number Description Possible Values
1 Diagnosis Byte, slot
number
31 = CI502-PNIO (e. g. error at integrated
8 DI / 8 DO)
1 = 1st connected S500 I/O module
...
10 = 10th connected S500 I/O module
2 Diagnosis Byte, module
number
According to the I/O bus specification
passed on by modules to the fieldbus
master
3 Diagnosis Byte, channel According to the I/O bus specification
passed on by modules to the fieldbus
master
4 Diagnosis Byte, error code According to the I/O bus specification
Bit 7 and bit 6, coded error class
0 = E1
1 = E2
2 = E3
3 = E4
Bit 0 to bit 5, coded error description
5 Diagnosis Byte, flags According to the I/O bus specification
Bit 7: 1 = coming error
Bit 6: 1 = leaving error
In cases of short circuit or overload, the digital outputs are turned off. The modules performs
reactivation automatically. Thus an acknowledgement of the errors is not necessary. The error
message is stored via the LED.
Device Specifications
Communication Interface Modules (S500) > PROFINET
2019/04/17 3ADR010121, 13, en_US 1057