[foxboro] RE : Hard-coding the block inhibit parameters

I hope that I am not being redundant with any of this information.  The first 
item to configure when you want the alarm is the Option parameter.  Each type 
of alarm has its own parameter name.  As an example, we use the AIN High/Low 
Option (HLOP) then you have 
 
0 = No alarming
1 = High and Low absolure 
2 = High Abs only
3 = Low abs only
 
So if you only want low alarming then configure a 3 in this parameter and you 
never need to worry about high alarms.
 
Once you have your alarm configured then you should connect the .INHSTA 
parameter to the INPUTS parameter of a MCIN (no IO) block. Then you can use the 
AIN default display - ALARMS - overlay to toggle the inhibits that you desire. 
Now go to the default display for the MCIN and you can view the hex pattern  in 
the INPUTS:  box. For example if you inhibit the High and Low Absolute alarms 
your will see 00030000 displayed.
 
To set only the high and the low inhibit your would set the hex pattern 0x0003 
into the AIN.INHALM. Use a program or a script with omsetimp to write this hex 
value.
 
Toggling the  AIN.INHIB to a TRUE will inhibit all the configured alarms in 
your block.  Setting AIN.INHIB to a FALSE will release the AIN block to inhibit 
only those specified by the hex pattern of the INHALM.  Obviously, with INHIB = 
FLASE and INHALM = 0 all configured alarm annunciation is enabled.
 
Terry
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