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33
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RS232 CONNECTION TO PC
To connect STS to any PC from RS232 use special cable for connection. STS CONTROL software must be run
on PC.
figure – 16
STS RS232 connection to PC
Notes
•
special cable is not a standard RS232 cable ,PC side is standard RS232 pins but the STS side pin
functions are different then a standard RS232 cable.
•
Maximum cable length of the RS232 interface is 25 meters.
RS232 Pinouts
figure – 17
RS232 pinouts
RS232 security
The STS serial port is interactive with PC so PC can send any command to STS in this case unauthorized users
can change parameters and send unwanted commands to STS. To prevent unauthorized access to STS from
serial port two level security is provided.
a) User can enable or disable remote RS232 commands from options menu ,if remote is disabled(off) STS will
accept only parameter sending commands. The control commands will be refused.
b) From PC user password is required (USER LOGIN). If password is sent from PC to STS ,2 minutes login
status will be applied ,during this time control commands and user options will be accepted from RS232 serial
port. Bu at the end of this time remote user will be logged out.
Summary of Contents for InfoSTS
Page 45: ...44 Figure 28...
Page 47: ...NOTES...