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. 2014 Nov 27;14(12):22447–22470. doi: 10.3390/s141222447

Table 10.

Example I for the division of PLC storage area.

Device Range Type DVP (Hex) Modbus (Decimal) Effective

ES/EX/SS SA/SX/SC EH
S 000∼255 bit 0000∼00FF 000001∼000256 0∼127 0∼1024 0∼1024
S 256∼511 bit 0100∼01FF 000257∼000512
S 512∼767 bit 0200∼02FF 000513∼000768
S 768∼1023 bit 0300∼03FF 000769∼001024

X 000∼377(Octal) bit 0400∼04FF 101025∼101280 0∼177 0∼177 000∼377
Y 000∼377(Octal) bit 0500∼05FF 001281∼001536

T 000∼255 bit 0600∼06FF 001537∼001792 0∼127 000∼255 000∼255
word 0600∼06FF 401537∼401792

M 000∼255 bit 0800∼08FF 002049∼002304 0∼1279 0∼4095 0000∼4095
M 256∼511 bit 0900∼09FF 002305∼002560
M 512∼767 bit 0A00∼0AFF 002561∼002816
M 768∼1023 bit 0B00∼0BFF 002817∼003072
M 1024∼1279 bit 0C00∼0CFF 003073∼003328
M 1280∼1535 bit 0D00∼0DFF 003329∼003584
M 1536∼1791 bit B000∼B0FF 045057∼045312
M 1792∼2047 bit B100∼B1FF 045313∼045568
M 2048∼2303 bit B200∼B2FF 045569∼045824
M 2304∼2559 bit B300∼B3FF 045825∼046080
M 2560∼2815 bit B400∼B4FF 046081∼046336
M 2816∼3071 bit B500∼B5FF 046337∼046592
M 3072∼3327 bit B600∼B6FF 046593∼046848
M 3328∼3583 bit B700∼B7FF 046849∼047104
M 3584∼3839 bit B800∼B8FF 047105∼047360
M 3840∼4095 bit B900∼B9FF 047361∼047616

C 0∼199 16-bit bit 0E00∼0EC7 003585∼003784 0∼127 0∼199 0∼199
word 0E00∼0EC7 403585∼403784 0∼127 0∼199 0∼199

200∼255 32-bit bit 0EC8∼0EFF 003785∼003840 232∼255 200∼255 200∼255
Dword 0EC8∼0EFF 403785∼403840 232∼255 200∼255 200∼255