C.2 Terms For The Safetytool And For Safe Parameterisation - Festo CAMC-G-S3 Manual

C Glossary
C.2 Terms for the SafetyTool and for safe parameterisation
Term
Actual value
Basic unit
Check sum
Communication
object
Display unit
Display value
Offline
parameterisation
Online
parameterisation
Product term
Project
Quantisation
Quantisation area
Reference value
Safe basic status
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
Meaning/function
The current value of a parameter in the safety module, converted to the de­
sired display unit
Motor controller as the carrier of the safety module, here a CMMP-AS-...-M3.
Measure for guaranteeing the integrity of data which is sent or stored. In so
doing, check sums are generated from the data, which guarantee data parity
sufficient under normal circumstances.
Individual data element, which can be read, written to and validated by the
SafetyTool.
Unit in which the appropriate parameters are displayed. The desired display
units for position values, speed values and acceleration values are specified
by the executing program when the SafetyTool is started.
The value of a parameter converted to the desired display unit.
Operation of the SafetyTool, without a connection to the device (on the desk)
Operation of the SafetyTool, with a connection to the device (via the basic
unit).
In order to configure switching conditions of the safety module, logic opera­
tions between the logical inputs and the virtual outputs and between the
virtual outputs and the logical outputs are configured in the form of so-called
product terms.
A product term is an AND operation with or without inversion with a maxim­
um of 7 inputs.
Maximum of 4 product terms can be combined as an OR operation.
The product terms (AND operation) and OR operations are generally termed
gates.
See SafetyTool project.
Some parameters are quantised (rasterised) by the safety module, e.g. if the
value must be a multiple of a cycle time.
In such cases, when reading out the safety module, a value can be fed back
which is different than the written value. However, the specified quantising
ranges do not create any relevant deviations.
Tolerance between the written value and the read value of a parameter. Val­
ues within the quantisation limit can be viewed as identical. The quantisation
limit is read from the safety module during writing parameter access.
The display value of a parameter specified by the user.
If the parameterisation is missing, invalid or not fully validated, the safety
module switches to the safe basic status:
– output stage switched off
– clamping unit or holding brake closed
– DOUT4x outputs switched off at safety module
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