Siemens ESM - Manual (Page 77)

Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
73
Firmware Update
6
With the OSM/ESM it is possible to update the firmware via the serial port.
You can obtain information on the firmware updates for OSM/ESM on the Internet
at
http://www.siemens.de/automation/service&support
specifying the keyword "OSM Firmware".
To download the firmware you require a PC with Windows 95/98/NT and the
Hyperterminal program available under Accessories. The download is explained
below based on the dialogs displayed in Hyperterminal.
Preparations
Connect the serial port of your PC and the OSM/ESM with a normal null modem
cable . Depending on the port of your PC that you select, you use a cable with a 9-
pin or 25-pin sub-D female connector at the PC end and a 9-pin female connector
at the OSM/ESM end.
The following table shows the pinning and the connections for both types of cable:
PC port 25-pin
Female 9-pin
Female connected
to OSM port 9-pin
Female
Signal Name Pin Pin Pin Signal name
TD (Transmit Data) 2 3 2 RD
RD (Receive Data) 3 2 3 TD
RTS (Request To
Send) 4 7 8 CTS
CTS (Clear To Send) 5 8 7 RTS
SG (Signal Ground) 7 5 5 SG
DSR (Data Set Ready) 6 6 4 DTR
DTR (Data Terminal
Ready) 20 4 6 DSR