WindSonic Doc No 1405 PS 0019 Issue 28 November 2019
20
7.5 Connecting WindSonic Option 2 or 3 set for default
RS422 to a PC using an RS232 Safe Mode Connection.
WindSonic
9 Way circular connector
PC
Typical 9 Way ‘D’ Connector
Signal names
Pin nos.
Cable – 3 twisted
pairs
Signal names
Pin no's
TXD
RXD
5
7
RXD
TXD
2
3
Signal
Ground
1
Signal Ground
5
Do NOT
connect
at this end
N/A
Screen and drain
wires
Chassis
ground
N/A
V
V supply -
2
3
+
–
DC Power supply
(See Para 7.3.2)
1.
Connect the Option 2 or 3 WindSonic as per the above connection diagram.
2.
With WindSonic power off, set up a HyperTerminal connection as per Page 46
but
with the Baud rate set to 19200 (this can be at variance with the original
WindSonic Baud rate setting).
3.
Hold down
the * character (shift 8) and then apply power to the WindSonic. After
approximately 3 seconds the unit will respond with
Safe Mode
.
4.
To change output communication from RS422 to RS232 then remove any * characters
on screen.
5.
Type E3 and press Enter (changes E2 setting to E3).
6.
E3 will be seen twice on screen to confirm the setting change to RS232 has occurred.
7.
Change any other configuration settings as required.
8.
Type Q and press Enter to go back into measurement mode (garbled data may appear
on screen if the original WindSonic Baud rate setting is not 19200bauds).
9.
If required close the 19200-baud HyperTerminal connection and re-open at the
WindSonic Baud rate. If a continuous data mode has been previously chosen then data
will scroll on screen.
See also para 12.3.
(Note that supply voltage connections are reversed compared to the Option 1 RS232
unit. Damage will not occur from a reverse voltage connection).
7.6 Changing an Option 2 or 3 Sensor set for RS232 back
to RS422.
Connect the Option 2 or 3 WindSonic as per Para 7.5.
Repeat instructions shown in Para 7.5 except that in Safe Mode set the E Command to E2
etc.
