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ifm
Programming Manual ecomatController/60-1 (CR711S) Operating System V2.5.0.n
2017-12-19
Glossary of Terms
>
SDO
SDO =
S
ervice
D
ata
O
bject.
The SDO is used for access to objects in the CANopen object directory. 'Clients' ask for the requested
data from 'servers'. The SDOs always consist of 8 bytes.
Examples:
• Automatic configuration of all slaves via →SDOs at the system start,
• reading error messages from the →object directory.
Every SDO is monitored for a response and repeated if the slave does not respond within the
monitoring time.
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Self-test
Test program that actively tests components or devices. The program is started by the user and takes
a certain time. The result is a test protocol (log file) which shows what was tested and if the result is
positive or negative.
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Slave
Passive participant on the bus, only replies on request of the
→master. Slaves have a clearly defined
and unique
→address in the bus.
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stopped
Operating status of a CANopen participant. In this mode only
→NMT commands are transferred.
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Symbols
Pictograms are figurative symbols which convey information by a simplified graphic representation.
(
→ chapter
What do the symbols and formats mean?
)
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System variable
Variable to which access can be made via IEC address or symbol name from the PLC.
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T
Target
The target contains the hardware description of the target device for CODESYS, e.g.: inputs and
outputs, memory, file locations.
Corresponds to an electronic data sheet.
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TCP
The
T
ransmission
C
ontrol
P
rotocol is part of the TCP/IP protocol family. Each TCP/IP data connection
has a transmitter and a receiver. This principle is a connection-oriented data transmission. In the
TCP/IP protocol family the TCP as the connection-oriented protocol assumes the task of data
protection, data flow control and takes measures in the event of data loss. (compare:
→UDP)
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Template
A template can be filled with content.
Here: A structure of pre-configured software elements as basis for an application program.
