Product Specific Terms And Abbreviations - Festo CPX-F8DE-P Manual

Contents and general instructions

Product specific terms and abbreviations

Term/abbreviation
Acknowledgment
Black channel
Category
Channel-wise
passivation
CRC signature
Cross circuit
Cross-circuit
monitoring
Cycle monitoring
XXIV
Significance
Signal or procedure for depassivation. An acknowledgment from the user
confirms that the input module can be brought back on line without
danger, and/or that the input channel can be depassivized without any
attendant risk.
Once the complete input module has been passivized (è Module-based
passivation), acknowledgment involves regular è Reintegration (standard
PROFIsafe process).
If an input channel has been passivized (è Channel-based passivation),
acknowledgment involves the use of an acknowledgment signal on the
process image è Chapter 1.2.3.
The "black channel" is the name given to a transmission route without
technical safety properties across which secure communication can be
effected through the additional of failsafe mechanisms. For example, the
field bus and the bus node (PROFIBUS or PROFINET IO) is part of the black
channel across which PROFIsafe­communication is processed.
Category (Cat.) is a measure of the resistance of a safety-aligned system to
faults and of its subsequent behaviour after a fault, achieved through the
structure of its component arrangement, fault detection and its reliability
level è EN ISO 13849-1.
Type of passivation whereby only the channel pair of the affected defective
input channel is passivized. The input module remains incorporated.
To depassivize, an Acknowledge signal is required via the process image
è Chapter 1.2.4.
Test value in security telegram from PROFIsafe to check integrity of
telegram data (Cyclic Redundancy Check).
Unintended electrical connection between signals. Cross circuits falsify the
signal and cause failure of the safety function.
Function that detects possible cross-circuiting in the circuits connected to
the device and that adopts a safe mode for the device and/or for the input
channel affected. This can involve è Cycle monitoring and/or discrepancy
monitoring.
In the function modes with cycle monitoring, the inputs are used to detect
if the actual cycle, an external cycle or the sensor power supply is present.
The information is not released in the PROFIsafe input image until the
anticipated cycle has been detected.
Festo P.BE-CPX-F8DE-P-E N en 1610a English