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ifm
Programming Manual BasicDisplay CR0452 v03.02
05 / 2018
Terms and abbreviations
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RAW-CAN
RAW-CAN means the pure CAN protocol which works without an additional communication protocol
on the CAN bus (on ISO/OSI layer 2). The CAN protocol is international defined according to
ISO 11898-1 and garantees in ISO 16845 the interchangeability of CAN chips in addition.
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remanent
Remanent data is protected against data loss in case of power failure.
The
→runtime system for example automatically copies the remanent data to a →flash memory as
soon as the voltage supply falls below a critical value. If the voltage supply is available again, the
runtime system loads the remanent data back to the RAM memory.
The data in the RAM memory of a controller, however, is volatile and normally lost in case of power
failure.
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ro
RO = read only for reading only
Unidirectional data transmission: Data can only be read and not changed.
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RTC
RTC =
R
eal
T
ime
C
lock
Provides (batter-backed) the current date and time. Frequent use for the storage of error message
protocols.
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Runtime system
Basic program in the device, establishes the connection between the hardware of the device and the
application program.
→ chapter
Software modules for the device
(
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rw
RW = read/ write
Bidirectional data transmission: Data can be read and also changed.
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S
SAE J1939
The network protocol SAE J1939 describes the communication on a
→CAN bus in commercial
vehicles for transmission of diagnosis data (e.g.engine speed, temperature) and control information.
Standard: Recommended Practice for a Serial Control and Communications Vehicle Network
• Part 2: Agricultural and Forestry Off-Road Machinery Control and Communication Network
• Part 3: On Board Diagnostics Implementation Guide
• Part 5: Marine Stern Drive and Inboard Spark-Ignition Engine On-Board Diagnostics Implementation
Guide
• Part 11: Physical Layer – 250 kBits/s, Shielded Twisted Pair
• Part 13: Off-Board Diagnostic Connector
• Part 15: Reduced Physical Layer, 250 kBits/s, Un-Shielded Twisted Pair (UTP)
• Part 21: Data Link Layer
• Part 31: Network Layer
• Part 71: Vehicle Application Layer
• Part 73: Application Layer – Diagnostics
• Part 81: Network Management Protocol