Ssi: Error/Additional Bits - BONFIGLIOLI Active Cube User Manual

8.4.9 SSI: error/additional bits

If SSI encoders are used, the available error/additional bits of the encoder can be
masked for evaluation. Many encoders use one or more bits for error signaling. In
some cases, the bits are also used for transmitting additional information not required
for encoder evaluation in the frequency inverter.
Arrangement SSI-Bits (number of individual bits as an example)
The number of bits is shown as an example in the illustration. Multiturn bits are only
present in the case of Multiturn encoders. The additional bits "Low bits" are used by
many encoder manufacturers with 1 or 3 bits. The additional "High bits" are only used
very rarely by encoder manufacturers.
Depending on the function intended by the encoder manufacturer, an error bit "High"
or "Low" may trigger an error.
Parameters 1269
evaluate up to eight error bits each. SSI error MSBits is used for the definition the most
significant bits, and SSI error LSBits is used for the less significant bits.
To determine the total data width, the two parameters must always be defined. This
definition is also required if no evaluation is to take place. In this case, all bits must be
masked as "Don't care" with an "X" in the string.
If no error bits or other bits are present ("empty string"), a dash "" must be paramete-
rized.
The following values are permissible:
H: When the bit is "High", error F172A or F172B will be triggered.
L: When the bit is "Low", error F172A or F172B will be triggered.
X: No error will be triggered for the bit, regardless of its status.
-: Number of bits = 0 (use in this case only).
Lowercase letters can be used alternatively in the entry.
Note: This parameter cannot be entered by means of KP500.
Note: Other values cannot be entered.
Special case: Number of bits = 0:
SSI additional bits in the High range are not used by many encoder manufacturers. In
these cases set the parameter to value "-" (dash).
No.
1269 SSI: Error-/Extra-Bits (Low)
1270 SSI: Error-/Extra-Bits (High)
Note:
106
SSI: Error-/Extra Bits (Low)
Parameters
Description
Due to the shifting of the usable data by the error/additional bits, the
number of error/additional bits must always be specified correctly.
EM-ABS-01 for ACU
and 1270
Error-/Extra Bits (High)
Settings
Min. Max.
Special, see text
can
Factory set-
ting
„-"
„-"
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