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Delta DOP Series HMI Connection Manual|DOP-A/AE/AS Series
Revision January, 2008, Doc. Name: 2007PDD23000007 1-125
Siemens S7 300 PLC (without PC Adaptor) Back to Table
A. HMI factory settings
Baud rate: 19200, 8, EVEN, 1. (RS-485).
Controller station number: 2.
Control area/status area: DBW0 / DBW20.
NOTE
1) Please notice that only 1(HMI) to 1 (PLC) communication is allowed.
2) PLC baud rate should be changed to 19200. (8, EVEN, 1.).
3) DB must be open, otherwise the related addresses can not be read and write.
(The related addresses are: DB.DBW, DB.DBD, DBW, DBD, VW, VD, DB.DBX, DBX, V)
4) HMI station must be set to 0 ~ 15. If it is out of this range, it will be changed to 15 automatically. PLC
station number must be set to 0 ~ 15.
5) The communication cable is the same as S7 200 series (RS-485).
6) If not connecting to communication cable after 5 seconds, HMI will show error message on the screen. If
connecting to communication cable, it is needed to power on HMI again, and then the communication
can be found.
7) After power in connected to HMI, HMI must accept the notification from PLC and then connection will be
established. The first time connection will take more time, but in normal condition, it should be connected
in 5 seconds.
8) This protocol is a token ring communication protocol (HMI needs to communicate with PLC for many
times for completing 1 command.) so the response of HMI will be slower (compared with other brands of
PLCs when the baud rate setting is set to the same value). The communication speed of S7 300 PLC
(without PC Adaptor) is usually slower than the other controllers, but it is the same as the communication
speed of S7 300 PLC (with PC Adaptor).
9) When connecting to S7 300 PLC, the communication error may occur occasionally. The user can adjust
the HMI communication response time via Extra function which can be found by clicking Option >
Configuration > Communication.