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Appendix B. Serial Communications with the CSAT3

B-2

TABLE B-1. RS-232 Command Codes

Command Trigger before

Command

Description

Trigger after

Command

& PC or CSAT3

timer

Unprompted data output mode. Send data and make

measurements at the rate specified by the An command.

CSAT3 timer

CSAT3 timer or

Send the RS-232 status (TABLE B-9) and trigger the next

measurement now.

CSAT3 timer or

Send wind data and trigger the next measurement now. PC

S PC or

CSAT3 timer

Send the RS-232 status (TABLE B-9). The next

measurement will be made in sync with the CSAT3 timer.

CSAT3 timer

W PC or

CSAT3 timer

Send the wind data. The next measurement will be made in

sync the CSAT3 timer.

CSAT3 timer

A(1..e)

1,3,4

PC or

CSAT3 timer

Begin acquiring the signals in sync with this command. No change

O SDM, PC, or

CSAT3 timer

Turn the analog outputs off in sync with the next trigger. No change

L SDM, PC, or

CSAT3 timer

Turn the analog outputs on with ±32 m s

-1

full-scale range in

sync with the next trigger

No change

H SDM, PC, or

CSAT3 timer

Turn the analog outputs on with ±64 m s

-1

full-scale range in

sync with the next trigger

No change

1 The CSAT3 will ignore this command if a datalogger (SDM) is triggering

the anemometer.

2 After the PC takes over as the trigger source it must continue to trigger the

CSAT3 at the rate specified in the Execution Parameter (An). If the

CSAT3 does not receive a trigger for three seconds it will enter the Lost

Trigger state. The Execution Parameter (An) will have to be issued in

order for the anemometer to exit the Lost Trigger state.

3 Acquire signal commands.

An Execution

Parameter

An Execution

Parameter

A1 Not Used A9 10 Hz

A2 1 Hz Aa 12 Hz

A3 Not Used Ab 15 Hz

A4 Not Used Ac 20 Hz

A5 2 Hz Ad 30 Hz

A6 3 Hz Ae 60 Hz

A7 5 Hz Ag

60 Hz → 10 Hz

A8 6 Hz Ah

60 Hz → 20 Hz

4 The PC must send the second byte of this command (2..e) within two

seconds of the first byte or the anemometer will reset itself. It will then

acquire the signal using the Execution Parameter in static memory.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 71 72

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Campbell FW05 Manuale Pagina 58

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