Beckhoff EP7402-0057, Manual

Page: 42 / 63

Troubleshooting
EP7402-0057 42 Version: 1.3
5.1 Diagnosis bits
The diagnostic bits are located in the process data object "STM Inputs Device" [
}
13] .
The diagnostic bits indicate warning and error messages.
• Warning messages ("warning") are temporary.
A warning message indicates that a measured value lies outside of the nominal range. A warning
message is canceled when the measured value is within the nominal range again.
• Error messages ("error") are persistent.
If an error occurs, the affected motor channels are disabled until you acknowledge the error. See
chapter
Acknowledging errors [
}
44] .
There are two different scopes for diagnostic bits:
• Module errors and module warnings concern the entire box.
• Channel-related errors and warnings concern only one motor channel.
The diagnostic bits are subdivided according to these two categories below.
Modul errors and module warnings
If a module error occurs, both motor channels are disabled. Both channels are enabled again when the
module error has been correctly acknowledged. See chapter
Acknowledging errors [
}
44] .
Bit name Meaning Possible reasons Possible solutions
Device undervoltage
The supply voltage U
P
is lower than the threshold value of the un-
dervoltage detection.
Make sure that U
P
lies within the
nominal voltage range.
Check the measured value of
the voltage U
P
in the CoE pa-
rameter F900:05
hex
"Motor sup-
ply voltage".
Device overvoltage
The supply voltage U
P
is higher than the threshold value of the
overvoltage detection.
Overtemperature warning
The internal temperature lies
above the warning threshold:
Parameter F80F:04
Factory setting: 80 °C.
• The ambient temperature is too
high.
• The connected motor does not
meet the specifications
Operate the device only within
the
specifications [ } 9] .
Overtemperature error
The internal temperature has ex-
ceeded the error threshold:
Parameter F80F:05
Factory setting: 100 °C.
General hardware error
The device is not able to initial-
ize successfully. The device is defective. None.
Channel-related errors and warnings
If a channel-related error occurs, only the motor channel on which the error occurred is disabled.
Bit name Description Possible reasons Possible solutions
Channel n openload
At least one motor phase is high-
resistance. • A motor phase is not con-
nected correctly.
• A motor phase has burnt out.
• Check the motor connection.
• Replace the motor if it is defec-
tive.
Channel n short circuit
At least one phase current has
exceeded the value of the pa-
rameter "Maximum current":
CoE
index 80n0:01 [ } 47] .
The motor channel has been dis-
abled.
• A motor phase is short-cir-
cuited.
• The motor is defective.