What it means
A50002 (COMM BOARD: Alarm 2) is reported by the CBE20 when the drive communicates over SINAMICS Link: a specific telegram word on the send side is being used twice in the parameter assignment, i.e. one and the same send telegram word appears more than once. The alarm value stored in r2124 identifies the affected word. Depending on the drive's configuration, the same condition can also be issued as a fault rather than as an alarm.
Why it appears
- CBE20 SINAMICS Link: a specific telegram word (send) is being used twice — the SINAMICS Link parameter assignment contains a send telegram word that is used more than once.
What to check
- Read the alarm value in r2124 and interpret it as a decimal number; it identifies the telegram word (send) that is being used twice.
- Open p8871 (SINAMICS Link PZD send word) and check the assignment of the send telegram words.
- Correct the parameter assignment so that every SINAMICS Link send telegram word is used only once.
Reading the message value
- The alarm value is stored in r2124 and is to be interpreted as a decimal number; it identifies the telegram word (send) that is being used twice.
Parameters the manual names
- p8871 (SINAMICS Link PZD send word) — the parameter assignment to check and correct for this alarm: it holds the send telegram words, and the duplicate must be removed here.
- r2124 (alarm value) — read the alarm value here, interpreted as a decimal number, to identify the telegram word that is used twice.
Acknowledging and restarting
As an alarm, A50002 requires no acknowledgement. If the drive is configured to signal the same condition as a fault instead, the fault triggers no automatic reaction (NONE) and is acknowledged IMMEDIATELY.
The same on every family
Every manual that describes A50002 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Communication error to the higher-level control system (9) | None | SINAMICS S120, S150 List Manual · p. 3298 |
| G130, G150 | NONE | NONE | Communication error to the higher-level control system (9) | None | SINAMICS G130, G150 List Manual · p. 1936 |
The drives this code lives on
A50002 is described for G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does A50002 on a SINAMICS drive mean?
It is the COMM BOARD: Alarm 2 entry: the CBE20 reports that a specific telegram word (send) is being used twice in the SINAMICS Link parameter assignment. The alarm value in r2124, read as a decimal number, identifies the affected word.
How do I fix alarm A50002?
Correct the parameter assignment in p8871 (SINAMICS Link PZD send word) so that each SINAMICS Link send telegram word is used only once. As an alarm, the entry itself requires no acknowledgement.
Does A50002 stop the drive?
No. The alarm triggers no automatic reaction, and if the drive is configured to issue the condition as a fault, the reaction is also NONE; that fault is then acknowledged IMMEDIATELY.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A50xxx group · SINAMICS manuals · Siemens manuals