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SIEMENS S7/300
Siemens S7/300 series PLC
http://www.ad.siemens.com
HMI Setting:
Parameters Recommend Option Notes
PLC type SIEMENS S7/300
Com port RS232
Baud rate
19200, 38400,
187.5K
9600~187.5K
Must same as the PLC setting
The HMIs which has sticker MPI187.5
on the rear panel, support 187.5 baud
rate.
Parity bit Odd
Data Bits 8
Stop Bits 1
HMI Station No. 0
Does not apply to this protocol
PLC Station No. 2
Must same as the PLC setting
PLC Setting:
Communication mode
Device address:
Bit/Word Device Type Format Range Memo
B I dddd(o) 0-40957 Input (I)
B Q dddd(o) 0-40957 Output (O)
B M dddd(o) 0-40957 Bit Memory
B DB0Bit-DB99Bit dddd(o) 0-81927 Data register bit
W DB0-DB99 dddd 0-8192 Data register(must be even)
W IW dddd 0-4095 Input (I)
W QW dddd 0-4095 Output (O)
W MW dddd 0-4095 Bit Memory
W DBn dddddd 000000-998192 Data register(must be even)
DW
DBDn fffdddd ff:0-255, dddd:0-8192 Data register double word (must be
multiple of 4)
* Double word and Floating point value must use DBDn device type.
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