Specifications

Comfort Reference Value – 5th Generation of STÖBER Inverters STÖBER
ANTRIEBSTECHNIK
11. Used Parameters
KSW-119
B.. Motor
Par. Description Fieldbus-
address
B296
Global
read (3)
Error-counter motor-encoder: Counts the number of tolerable errors of the motor encoder
since the last device new start.
NOTE
The parameter can only be used when an SSI or EnDat
®
encoder is evaluated on the inverter.
Fieldbus: 1LSB=1; Type: U32; USS-Adr: 02 4A 00 00 hex
2328h 0h
B297
Axis
r=3, w=3
Maximum-speed motorencoder: B297 can be used for a plausibility check of the motor
encoder signals for EnDat
®
and SSI encoders. The difference between two consecutive encoder
values is monitored. If this difference exceeds the speed specified in B297, a fault is triggered
(37:n-feedback / double transmission, starting with V5.2: 37:Encoder / X4-speed or X120-speed).
NOTE
The parameter can only be used when an SSI or EnDat
®
encoder is evaluated on the inverter.
Value range in rpm: 0 ... 131071 ... 17 Bit
Fieldbus: 1LSB=1rpm; Type: I32; (raw value:14 Bit=1·rpm); USS-Adr: 02 4A 40 00 hex
2329h 0h
B298
Axis
r=3, w=3
Error-tolerance motorencoder: Sets the tolerance of the inverter to errors of the motor
encoder. This tolerance can be used to prevent a fault 37:Encoder when encoder errors occur
sporadically. The inverter extrapolates an encoder value in this case. The parameter B298 specifies
how many errors will be tolerated before the inverter malfunctions.
Error evaluation is structured as shown below:
Each arriving encoder value is checked. When an encoder error is determined, B299 and B298 are
compared. If the error evaluation counter B299 is greater than or equal to B298, fault 37: Encoder
is triggered. If B299 is less than B298, the error is tolerated. The counter status B299 is
incremented by 1.0.
If the arriving encoder value is correct, the error evaluation counter B299 is decremented by 0.1.
Decrementation continues until the value 0 is reached.
Example: When 0.1 is set in B298, one error is tolerated but there must be at least 10 correct
values before the next error is determined.
The following errors are tolerated:
- EnDat
®
-CRC
- EnDat
®
-Busy
- SSI-double transmission
- SSI-Busy
- Violation of the maximum speed in B297
With other encoder errors (e.g., wire break), a fault is triggered immediately regardless of B298.
Error tolerance may negatively affect the quality of movement. The wiring should be checked when
encoder errors occur frequently.
NOTE
The parameter can only be used when an SSI or EnDat
®
encoder is evaluated on the inverter.
Value range: 0.0 ... 1,0 ... 3.0
Fieldbus: 1LSB=0,1; Type: I8; USS-Adr: 02 4A 80 00 hex
232Ah 0h
B299
Global
read (3)
Error-evaluation motorencoder: Shows the current status of the error evaluation counter
(see B298).
NOTE
The parameter can only be used when an SSI or EnDat
®
encoder is evaluated on the inverter.
Fieldbus: 1LSB=0,1; Type: I8; USS-Adr: 02 4A C0 00 hex
232Bh 0h