2 Connecting to SIEMENS PLCs Note 1 The PLC Station No. is not needed if the PC adapter is used, which realize one for one communication. 2 When MPI-Adapter SSW7, RS232 (Order No.700-751-1VK21) manufactured by Helmholz is used, set the communication speed as follows. Also the firmware of the MPI-Adapter should be V3.4b7 or later. • PLC communication speed: 19.2/187.5 kbps • PT communication speed: 9600/14400/19200/38400/56000/57600/115200 bps 3 DB blocks should be established in PLC program configuration, otherwise the relevant registers (DB.DBX, DB.DBW, DB.DBD) can not be written. The even parity should be used on the initial addresses of DBm.DBW and DBm.DBD.
Note For information of the product manufactured by Helmholz, please access to website as follows. Systeme Helmholz GmbH http://www.helmholz.de/ If the firmware version of the purchased MPI-Adapter is old, please download SHTools from website as above to update the firmware. PLC Settings 1 When MPI-Adapter manufactured by Helmholz is used, set the communication speed of PLC to 19.2 Kbps or 187.5 Kbps. 2 The MPI address must be 2. 2-6 NB-series Programmable Terminals Host Connection Manual (V108)