POSCON的变化由变量Xsition跳变位的变化决定。变量Xsition的值写进一次，–般保持3个扫描期，跳变位保持相同的值3个扫描期。因而，POSCON连续不断地每隔3个扫描周期传递能流。注意:如果变量Xsition的值实际上每个扫描周期就写进一次，那么POSCON的变化就和PTCON的变化

OMRON C500-NC211 USPP C500NC211

OMRON C500-NC222 USPP C500NC222

OMRON C500-NC222-E USPP C500NC222E

YASKAWA ELECTRIC JANCD-MM13B NSFP JANCDMM13B

ALLEN BRADLEY MPL-B4530F-SJ22?AA FNFP MPLB4530FSJ22AA

INDRAMAT VCM-2 NSPP VCM2

FANUC A06B-0148-B175 NSPP A06B0148B175

CABLETRON SSR-SERC-04-AA USPP SSRSERC04AA

SIEMENS 6SE9221-8CC13 NSFP 6SE92218CC13

GE FANUC IC697GDC701 USPP IC697GDC701

ALLEN BRADLEY 1336-B020-AA-EN?-HA1-L6 NSFP 1336B020AAENH
NASH 2BH7310-0AH11-7 NSPP 2BH73100AH117

ACTUS POWER NPSA-2.5-64 NSPP NPSA2564

WESTINGHOUSE 872D190G03 NSFP 872D190G03

ALLEN BRADLEY 3500-P72 NSPP 3500P72

NSK ML-YA13096E02AT?15 NSFP MLYA13096E02AT1?5

SIEMENS 1FT6102-8AC71-3?TA0 NSFP 1FT61028AC713TA?0