Re: alarm acknowledgement

[Marty Kraimer <mrkraimer@comcast.net>]

Terry Cornall wrote:
> Hi All
>
> Perhaps someone can point to me to the doco that describes how an 
> acknowledgement can be sent to an alarmed record?
> I see that there is a field ACKT that if set to YES means that an 
> alarm must be acknowledged and is latched until it is, and I see 
> reference to Channel Access providing a method to do this but I can’t 
> find the details. Is there any way (other than installing the ALH 
> alarm handler gui) that I can acknowledge (and presumable reset) a 
> transient alarm in a record? I was hoping for something as simple as a 
> caput….
> Thanks in advance.
The following, which appears in mrkSoftTest does what you want:

/*caputackt.c*/
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "cadef.h"

int main(int argc,char **argv)
{
chid mychid;
unsigned short value;

if(argc!=3) {
printf("usage: caputackt pvname value\n");
exit(1);
}
sscanf(argv[2],"%hu",&value);
SEVCHK(ca_task_initialize(),"ca_task_initialize");
SEVCHK(ca_search(argv[1],&mychid), "ca_search");
ca_pend_io(5.0);
SEVCHK(ca_put(DBR_PUT_ACKT,mychid,&value),"ca_put");
ca_pend_event(1.0);
/*
ca_task_exit();
*/
return(0);
}


The value you write is the highest severity you want to acknowledge. 
Remember that (0,1,2,3) means (noalarm,minor,major,,invalid)