外部块还从调用他的块中继承系统变量FST_EXE和用于更新定时器函数块的”时间标签”。如果参数化程序块中使用了%L变量，并且这个块被MAIN块调用，%L变量值将从%P变量继承(例如%L0005=%P0005)。
JOSLYN CLARK 5DP4-01100 NSPP 5DP401100
DYNAVISION S-16-24 USPP S1624
KEYENCE CORP CV-2600 NSFP CV2600
TOSHIBA VT130H7U4270 NSFP VT130H7U4270
SIEMENS 1FT6064-6AC71-3?EG1 NSFP 1FT60646AC713EG?1
MODICON MM-PMA1-100 USPP MMPMA1100
ALLEN BRADLEY 1336S-B010-AA-E?N4 USPP 1336SB010AAEN4
SIEMENS 6SC-9811-4BF54 USPP 6SC98114BF54
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ALLEN BRADLEY 1336VT-B025-EOP USPP 1336VTB025EOP
ALLEN BRADLEY 1336VT-B025-EOP?-L3-S1 USPP 1336VTB025EOPL
FANUC A16B-1000-0030/?06C USPP A16B1000003006C
AVTRON A19359-1 NSPP A193591
ALLEN BRADLEY 1745-LP153 NSFP 1745LP153
ALLEN BRADLEY 20DD8P0A0EYNANN?NN USPP 20DD8P0A0EYNANN?N
GE FANUC IC5002TAW0000 NSFP IC5002TAW0000
SIEMENS 6FX-1127-4AB01 USPP 6FX11274AB01
MTS SYSTEMS CO 01F0314 NSPP 01F0314
