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Netzone
Netzone - Glossary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


C

CAL
Can application layer

CANopen
Layer 7 protocol based on CAN

Change of state
For CAN: Bus node (encoder) sends it's data automatically when a position change occurs.

Channel
Signal track on which 1 or 0 is outputted.

CiA
CAN in automation (CAN users and manufacturers group)

CiA DS
CAN in automation draft standard, communication profile

CiA DSP
CAN in automation draft standard proposal, communication profile

CIM
Computer Integrated Manufacturing; i. e. the linking of different computer-aided processes in production and related fields for general use of the data.

CMD
Software tool for configuration and diagnosis of Interbus networks

COB
Communication object

Code
Format in which data are transmitted.

Code switching frequency
Number of position steps per second. For absolute shaft encoders with parallel interface: The maximum output frequency of the LSB output driver (fmax) also limits the maximum permissible code switching frequency: Code switching frequency max. = 2 fmax for Binary code Code switching frequency max. = 4 fmax for Gray code

Coefficient of thermal expansion
Material expansion under influence of temperature change [m/K m], relevant for linear scales.

Coincidence
Accordance of set value (preset) and actual value (count)

Coincidence mode
See operating mode

Complementary
Output circuit for which also the inverted signals are outputted (e.g. Channel A and Channel A). Electrically, the 1/0 levels are transmitted as voltage differences between two lines. In this way the information signal (the difference) remains pure as in general interferences are interspersed equally on both lines.

Connection box
In modular system 400 (plug-in type counters), the term "connection box" is used for the insert socket of the counter (see, for example, the totalizing counter in the modular system).

COR
Count correction

Count
Display of counted value (actual value) at the counter.

Count correction
Correction of count; correction is not stored.

Count input
Differential
For adding, subtracting or differential count. The counter is equipped with a subtracting and an adding input.
- Count direction
For adding, subtracting or differential count. The counter is equipped with a count input and a counter advance sense input.
Phase discriminator
For forward/backward counting. The counter is equipped with a 2-channel input. Signals are phase-shifted by 90 to allow counter to recognize count advance sense automatically. The count input can be programmed for single, double or 4-foldevaluation.

Counter advance sense input
See count input

Counter advance sense signal
Output signal of the counter; can be used independently of counter advance sense for control purposes (e.g. drive unit control). The counter advance sense signal operates independently of OUT signal status.

Counting frequency [f]
Number of count pulses per second [Hz] In pneumatic counters, the non-pulse period must be long enough to allow pressure to drop to approx. 0.15 bar for a minimum of approx. 12 ms.
Example:
Approximately 12 pulses/s are reached in a pressure range of 6 bar and at an ambient temperature of 20 C.
Note:
Increasing flow or length of tubing reduces maximum possible counting rate and thus also warming.

Counting mode
In mechanical counters only: (+) adding in the specified sense of rotation + () adding in the specified sense of rotation; subtracting in the reverse direction + (+) adding in both senses of rotation () subtracting in the specified sense of rotation; adding in the reverse direction

Counting rate
See count frequency

CRC
Cyclic redundancy check. Bit error protection method for data communication.

CSA approval
Approval by the Canadian Standards Association
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Member of DIN ISO 9001 Unitec