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Delta DOP Series HMI Connection Manual|DOP-A/AE/AS Series
1-122 Revision January, 2008, Doc. Name: 2007PDD23000007
Siemens S7 300 PLC (with PC Adapter) Back to Table
A. HMI factory settings
Baud rate: 38400, 8, ODD, 1. (RS-232).
Controller station number: 2.
(Communication via PC adapter, PLC station will not be used, therefore, only 1(HMI) to 1 (PLC)
communication is allowed.)
Control area/status area: DBW0 / DBW20.
NOTE
1) PLC DB memory (DBm.DBWn, DBm.DBDn, DBm.DBXn.b) must be open so that HMI can read/write.
2) The reason for using PC adapter:
When communicating via PC adapter, it is profibus with 187.5 K
baudrate at PLC side. Therefore, the
network structure is faster and steadier.
When HMI communicates with PLC without PC adapter directly, the protocol will be complicated and it
needs to lower PLC baud rate to 19200 due to HMI baudrate limit.
3) Baud rate setting
y It needs to set PLC baud rate to 187.5 K and higher. (it cannot use 19.2K)
y It needs to set baud rate of two sides when using PC Adapter
i) "PLC side": It needs to set same baudrate as PLC side (as previous item it needs to set
PLC baud rate to 187.5 K and higher and cannot use 19.2K)
ii) "HMI side": it can select 38.4K or 19.2K by using switch on the cable. (only these two
choices)
iii) HMI baud rate: it needs to set the baud rate of HMI side of PC adapter as previous item to
38.4K or 19.2K) (protocol setting is still 8, ODD, 1)
iv) There is no setting for PLC station and HMI station, so it won’t have the communication
problem with error station setting.
v) PC Adapter :
The power LED will be lit once connect to PLC. (power supply of PC adapter is from PLC)
If communication is OK, the communication LED will be blink. Otherwise, it will be dark.
B. Definition of controller Read/Write address
Register
Read/Write Range
Register Type Format
Word No. Bit No.
Input Image IWn n: 0 ~ 65534 N/A
Input Image IDn n: 0 ~ 65532 N/A