函數(shù)塊與作用范圍和參數(shù)化子程序不同，函數(shù)塊可以有自己的臨時(shí)變量%L缺省情況下，函數(shù)塊的內(nèi)部變量有自己的作用范圍，這些變量只在函數(shù)塊內(nèi)部可見(jiàn)。不能使用外部邏輯和硬件配置對(duì)這些變量進(jìn)行讀寫。要從函數(shù)塊外部進(jìn)行讀寫，必須將這些變量的作用范圍改為全局作用。

ASEA BROWN BOVERI MSB63800L NSFP MSB63800L

CONTROL TECHNIQUES FX-208 USPP FX208

NORAND 705-382-001 USPP 705382001

FANUC A06B-0501-B751 USPP A06B0501B751

MILLTRONICS 7ML0042AA101BB0 NSFP 7ML0042AA101BB0

ALLEN BRADLEY 8520-1APA1 USPP 85201APA1

ALLEN BRADLEY 1336S-B020-AN-E?N4 USPP 1336SB020ANEN4

ALLEN BRADLEY 1336S-B015-AA-E?N4 NSFP 1336SB015AAEN4

ADEPT TECH 10350-01044 NSPP 1035001044

LENZE EVS9326-ES USPP EVS9326ES

ANDOVER CONTROLS CX-9400 USPP CX9400

ALLEN BRADLEY 1336S-B010-AA-E?N-GM1 NSFP 1336SB010AAENGM?

ASEA BROWN BOVERI S6HQ800BWAS4 NSPP S6HQ800BWAS4

INDRAMAT TDM3.2-020-300-?W0 USPP TDM32020300W0

GENERAL ELECTRIC 531X175SSBADM1 USPP 531X175SSBADM1

CONTROL TECHNIQUES M75R-14ICD USPP M75R14ICD

KNOLL AMERICA INC KTS-32-64-T5-A-?KB USPP KTS3264T5AKB

RELIANCE ELECTRIC 0-52854 NSPP 052854