Texas Instruments WRL-10 instruction manual Operation via RS-232, Command Characters

Protect Mode

When the unit is in protect mode, scale, time setting, calibration and print set modes are disabled. To enter or exit protect mode, press the select key for more than 10 seconds. The WRL will display PPPP in the time and date window when the select key is depressed while in protect mode.

Daylight Savings Mode

When enabled through the print set routine, the unit will automatically adjust the time to correspond with daylight savings time. When daylight savings mode is enabled, two decimal points will be displayed in the time/date window when the select key is pressed.

Operation via RS-232

The WRL via its RS-232 interface can communicate with computers running either the TWICAL program, standard computer communication programs like Windows Hyperterm or dedicated weather applications like WeatherView32. The WRL responds to the following ASCII characters sent by computers, with ASCII space delimited text.

Command Characters

V- Firmware version number S- Firmware Serial#

I- Unit ID number

C- Unit responds with a daily minimum and maximum of all parameters, then clears. The rainfall rate is present rather than term rain.

Sample

MIN 07/24/90 SW 00MPH 000F 067F 067F 054% 30.00" 00.19"D 01.38"M 00.00"R MAX 07/24/90 SSE 25MPH 052F 071F 092F 099% 30.06" 00.19"D 01.38"M 00.72"R

c- Unit responds with a daily minimum and maximum of all parameters, then clears. The term rain is present rather than rainfall rate. (Note: use of the either c command will clear the logged min/max.)

Sample

MIN 07/24/90 SW 00MPH 000F 067F 067F 054% 30.00" 00.19"D 01.38"M 00.00"T MAX 07/24/90 SSE 25MPH 052F 071F 092F 099% 30.06" 00.19"D 01.38"M 00.72"T

The minimum and maximum associated with the C command is cleared automatically at midnight

D- Unit responds in an identical manner as the C command but does not clear the system memory.

Texas Weather Instruments, Inc. 13 WRL Instruction Manual