Interrupts/diagnostic alarms
6.2 Diagnostic alarms
Technology module TM FAST (6ES7554-1AA00-0AB0)
Equipment Manual, 04/2023, A5E52301130-AA
49
Diagnostic alarms
The diagnostics are displayed as plain text in STEP 7 (TIA Portal) in the online and diagnostics
view. You can evaluate the error codes with the user program. System-wise, the module is
modeled with only one channel containing all terminals. Therefore, "Channel 0" is always
indicated in the diagnostic message independent of the terminal from which the respective
diagnostic starts.
Note
"Channel 0" means the entire module in the diagnostics. In the description of the front
connector and the logic, however, "Channel" refers to an RS485/TTL channel.
The following diagnostics can be signaled:
Table 6- 5 Diagnostic alarms, their meaning and remedies
Diagnostic
alarm
Error
code
Meaning Remedy
Parameter assign-
ment error
H
Received parameter data record invalid
Check parameter data record
missing
H
Wiring of supply voltage L+ faulty
Check wiring of supply voltage L+
Supply voltage L+ of the technology module
missing
Feed supply voltage L+ to the technology
module via terminal 41
Front connector not inserted correctly
Insert front connector correctly
Technology module defective
Replace technology module
Module is defec-
H
Technology module defective
Replace technology module
outputs
1
H
• Error at digital outputs (LED DQm display
lights up red)
• Possible causes:
– Short-circuit
–
• Correct wiring at the digital outputs
• Check consumers connected to the
digital outputs
H
• Error at the connection of an RS485/TTL
channel
• Possible causes:
– Wire break
– No encoder connected
– Cable too long
– Short-circuit
– Overload
– External voltage
– Overtemperature
–
Parameter assignment error
• Check process wiring
• Check encoder/sensor
• Check parameter assignment
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