Unit installation

12-16

104: Set an Analog Alarm

This command allows you to set an alarm that will occur when an analog reading goes below a low

alarm point or above a high alarm point. When the alarm occurs, it will execute an internal macro

(see Chapter 8 for internal macro definitions). You can program this internal macro to do anything,

turn output lines on or off, speak a voice message, change your courtesy beep, etc. The alarm

point will be checked at intervals determined by the length of the input alarm timer (see Command

020). When the analog reading comes out of alarm by the "hysteresis" amount (set with Command

105), the analog alarm clear macro will be executed. You might want to program this macro to

change an output line and/or speak an alarm clear message.

<104> b l a n wwww Calibrate an analog input

Parameters:

- 104 is the default command name.

- B is the I/O board number (1..2)

- L is the analog input line number (1..8)

- A is 0 for a low alarm, 1 for a high alarm

- N is 1 for negative, 0 for positive for the following number

- WWWW is the alarm point with leading 0s if necessary

Notes:

The value you enter will have as many assumed decimal places as you set with Command 101.