Programming manual M238 | 3 MB - BERGER - POSITEC

SDO
sequential function chart
See SFC.
SFC
SNMP
Structured Text
symbol
system variable
Glossary
A service data object message is used by the fieldbus master to access (read/write)
the object directories of network nodes in CAN-based networks. SDO types include
service SDOs (SSDOs) and client SDOs (CSDOs).
A program written in the sequential function chart language can be used for
processes that can be split into steps. SFC is composed of steps with associated
actions, transitions with associated logic condition, and directed links between steps
and transitions. (The SFC standard is defined in IEC 848. It is IEC 61131-3
compliant.)
The simple network management protocol can control a network remotely by polling
the devices for their status, performing security tests, and viewing information
relating to data transmission. It can also be used to manage software and databases
remotely. The protocol also permits active management tasks, such as modifying
and applying a new configuration
A program written in the structured text (ST) language includes complex statements
and nested instructions (such as iteration loops, conditional executions, or
functions). ST is compliant with IEC 61131-3.
A symbol is a string of a maximum of 32 alphanumeric characters, of which the first
character is alphabetic. It allows you to personalize a controller object to facilitate
the maintainability of the application.
A system variable structure provides controller data and diagnostic information and
allows sending commands to the controller.
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