Siemens SINUMERIK 840D sl Function Manual page 728

Diagnostics
11.3 Safety messages for SINAMICS S120
C01750 SI Motion P1 (CU): Hardware fault, safety-related encoder
Response NONE
Acknowledg‐ IMMEDIATELY (POWER ON)
ment
Explanation The encoder that is used for the safety-related motion monitoring functions outputs a hardware fault.
Message value (r9749, interpret as decimal):
Encoder status word 1, encoder status word 2, which resulted in the message.
Remedy Check the encoder connection.
Replace the encoder.
This message can be acknowledged as follows:
Motion monitoring functions with SINUMERIK: From the machine control panel.
Note regarding encoder replacement for a third-party motor:
To acknowledge this safety message, the serial number of the encoder must be copied. This can be realized
using p0440 = 1 or p1990 = 1.
C01751 SI Motion P1 (CU): Effectiveness test error, safety-related encoder
Response NONE
Acknowledg‐ IMMEDIATELY (POWER ON)
ment
Explanation The DRIVE-CLiQ encoder for the safe motion monitoring outputs an error for the effectiveness test.
Message value (r9749, interpret as decimal):
For Siemens internal fault diagnostics only.
Remedy Check the encoder connection.
Replace the encoder.
This message can be acknowledged as follows:
Motion monitoring functions with SINUMERIK: From the machine control panel.
A01780 SBT when selected, the brake is closed
Response NONE
Acknowledg‐ NONE
ment
Explanation Not all of the brakes were open when selecting the brake test or starting the brake test.
Alarm value (r2124, interpret binary):
Bit 0 = 1:
The internal brake is closed.
Bit 1 = 1:
The external brake is closed (p10230.5, p10235.5, p10202).
Note:
The alarm is also output if no brakes have been configured in p10202.
See also: p10202 (SI Motion SBT brake selection), p10230 (SI Motion SBT control word), p10235 (SI Safety
Control Channel control word S_STW3B)
Remedy Open all of the brakes and repeat the brake test (p10230.0, p10235.0).
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated