KB call for a non-existent logic block
KDB opening a non-existent DB/DX-data block
LAD ladder diagram
LED light-emitting diode
NAU power failure
OB organization block
OR or (bit code)
OS overflow latching (word code)
OV overflow (word code)
PAFE parameter assignment error byte
PARE parity error
PB program block
PEU power failure on expansion unit
PG programmer
PI process image
PII process image of the inputs
PIQ process image of the outputs
PLC programmable controller
QVZ timeout
RAM random-access memory
RLO result of logic operation
SAC step address counter
SB sequence block
SPU operating system processor
STA status (bit code)
STL statement list
STS stop statement
SUF substitution error
STUEB BSTACK overflow
STUEU ISTACK overflow
TRAF transfer or load error
ZYK cycle error
List of Abbreviations
CPU 948 Programming Guide
A - 2 C79000-G8576-C848-04
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