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Contents and general safety instructions
Festo GDCP-CMXR-C2-HW-EN 1002NH
15
General product-specific terms and abbreviations
The following product-specific abbreviations are used in this documentation:
Term/abbreviation
Meaning
O
Digital output
Address switch
Used to set the internal module address
Analogue
inputs/outputs
Analogue inputs and outputs
Application
Sum of user programs
CANopen
Fieldbus protocol based on CAN, which is standardised as a European standard.
Ethernet
Physical protocol and network for connecting various devices
Functional earth
Earthing whose sole purpose is to safeguard the intended function of the
electrical equipment. The functional earth is used to discharge interference
voltages, which could otherwise lead to impermissible influences on the device.
I
Digital input
I/O module
Collective term for those modules that provide digital or analogue inputs and/or
outputs.
Logic 0
0 V applied at input, or output supplies 0 V.
Logic 1
24 V applied at input, or output supplies 24 V.
Optional modules
These are plugged into slots (max. 3) on the central module and make special
interfaces of the central module available.
Peripheral modules
To expand the function range, peripheral modules can be plugged into the central
module on the right-hand side. Signal generators and final control elements are
connected via input/output modules, for example.
Retain data
Data which are written into the memory of the control system by the application.
Normally these are quantities, time information or similar. Retain data keep their
value after the device has been switched off and on. If the program is restarted,
you can continue to work with the saved data. The data are not saved on the
Compact Flash memory card.
Runtime system
Operating system which manages all software components of the system and
whose initialisation is event-driven or timer-controlled.
Status report
Files which the device can save for error analysis. These include important
information on the state of the device at the time the error occurred. They can be
read out for service purposes.
Terminating resistor
Resistor for minimising signal reflections at the fieldbus. Terminating resistors
must be installed or connected at the end of bus segment cables.
Table 0.4: Product-specific terms and abbreviations
Summary of Contents for CMXR-C2
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