Example 8.

Implementing Manual Triggers

Parameters, unlike variables, are set by the user. Moreover, parameters are saved in non-volatile memory. This means, their values are preserved even if the controller loses power. Parameters are useful in implementing a high-level control to set the values of the outputs. Consider the following script.

title "example 8. manual trigger "

output oFan1, oHeat;

par pOut;

if(pOut==0)

{

oFan1 = 0;

oHeat = 0;

}

if(pOut==1)

{

oFan1 = 1;

oHeat = 0;

}

if(pOut==2)

{

oFan1 = 0;

oHeat = 1;

}

In the example given above, there are two outputs, one for a cooling fan, and another for a heater. The user to may change the output values by setting the value of the parameter. If the parameter value is 0, then both outputs are off. If the parameter value is 1, then the cooling fan is turned on and the heater is turned off. If the parameter value is 3, then the heater is turned on and the cooling fan is turned off. The user may set the parameter value either through the iNetGrow software or through a web page. The latter allows high-level control through the Internet or an intranet using any device that supports a web browser, for example, a web-enabled cell phone.

Also see : Programming, Program Examples, Script Syntax, Automated Tasks

© Rigel Corporation iNetGrow 2003-2006. All rights reserved.