What it means
F35804 carries the manual title TM: CRC
and is raised against the Terminal Module (TM) drive components. It means that a checksum error occurred when the program memory of the Terminal Module was read out: the checksum taken at POWER ON no longer matches the checksum actually read back. The same condition can also be issued as an alarm (A) or with no reaction (N) — the drive's configuration decides which form appears, and the fault described here is the configuration the page below assumes.
Why it appears
- A checksum error has occurred when reading out the program memory on the Terminal Module — both manuals that describe F35804 give this as the sole cause, so it applies to every Terminal Module drive object listed for this code.
What to check
- Check whether the permissible ambient temperature for the component is maintained.
- Replace the Terminal Module.
Reading the message value
- The drive stores the value in r0949 and it must be interpreted hexadecimal.
- It is the difference between the checksum at POWER ON and the actual checksum read from the Terminal Module.
Parameters the manual names
- r0949 — read the fault value here (hexadecimal) to see by how much the checksum now read from the Terminal Module's program memory differs from the checksum recorded at POWER ON.
Acknowledging and restarting
The manuals specify that this message is acknowledged immediately, and the acknowledgement is performed by a new POWER ON — so switch the power off and on again to clear the entry after the checks. When the drive is configured to show the same condition as an alarm (A) or without reaction (N), the manual specifies neither a reaction nor an acknowledgement for those forms.
The same on every family
Every manual that describes F35804 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | IMMEDIATELY (POWER ON) | Hardware/software error (1) | Terminal Module (TM) | SINAMICS S120, S150 List Manual · p. 3233 |
| G130, G150 | NONE | IMMEDIATELY (POWER ON) | Hardware/software error (1) | Terminal Module (TM) | SINAMICS G130, G150 List Manual · p. 1896 |
The drives this code lives on
F35804 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 fault F35804 (TM: CRC) mean on a SINAMICS drive?
It reports a checksum error when reading out the program memory on a Terminal Module: the checksum stored at POWER ON differs from the checksum actually read back.
How do I clear fault F35804?
Check that the permissible ambient temperature for the component is maintained, and replace the Terminal Module. The message is acknowledged immediately by a new POWER ON.
What does the fault value of F35804 in r0949 tell me?
Interpreted in hexadecimal, it is the difference between the checksum at POWER ON and the actual checksum of the Terminal Module's program memory.
Can F35804 also appear as an alarm?
Yes. The same condition can be issued as an alarm (A) or as a message with no reaction (N); in those forms the manual specifies no reaction and no acknowledgement.
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 F35xxx group · SINAMICS manuals · Siemens manuals