Alarm trending is an amazing feature, but only works if the alarm is on an analog tag and Ignition does the alarming on that value. In instances where we have a UDT with the PLC driving the alarm bits on/off and Ignition alarms triggered by those bits, it would be helpful to specify the analog value/tag those alarms come from so that we can still show the analog value trend for those alarms.

Example: UDT with an Alm/HH, Alm/H, Alm/L, Alm/LL boolean OPC tags and an Sts/Value float OPC tag. The alarm configuration would allow an alternative tag path (absolute or relative) to be specified for those alarms to point to the Sts/Value tag for trending purposes. This way the PLC is still in control of alarms but you could still see the analog trend with alarms pointed out on the trend.