Glossary - VLT® Safety Option MCB 150/151
B
Blank initial state Factory settings
D
Degree of protection The degree of protection is a standardized specification for electrical equip-
ment that describes the protection against the ingress of foreign objects
and water (for example, IP20).
E
Encoder Sensor for detection of the angular position of a rotating component. In-
stalled on/in a motor, the encoder shows the angular position of the rotor.
Error Discrepancy between a computed, observed, or measured value or condi-
tion and the specified or theoretically correct value or condition.
Error class Classification of errors into groups. The different error classes allow for spe-
cific responses to errors, for example by severity.
F
Factory settings Factory settings when the product is shipped.
Fatal error If a fatal error occurs, the product is no longer able to control the motor so
that the power stage must be immediately disabled.
Fault Fault is a state that can be caused by an error.
Fault reset A function used to restore the drive to an operational state after a detected
error is cleared by removing the cause of the error so that the error is no
longer active.
P
Parameter Device data and values that can be read and set (to a certain extent) by the
user.
PL/Performance level Discrete level used to specify the ability of safety-related parts of control
systems to perform a safety function under foreseeable conditions (EN ISO
13849-1).
R
RS485 Fieldbus interface as per EIA-422/485 Bus Description, which enables serial
data transmission with multiple devices.
S
Safe state If a safe state fault is detected, the safety option goes into safe state. This
includes faults related to integrity of hardware and firmware.
Glossary - VLT® Safety Option MCB
150/151
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292
100 | Danfoss A/S © 2018.09
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