Instruction manual

3. DESCRIPTION OF EACH MODULES
IMSRM15-E6
81
3.10.3 Functional description
AI alarm function
For the H-AI module, two types of alarm are available per channel as standard (AI alarm 1 and AI
alarm 2). Alarm types are those selected by the H-PCP module.
Alarm type: Process high alarm, Process low alarm, Process high alarm with hold action,
Process low alarm with hold action
AI alarm types
An AI alarm is different from a temperature alarm built in the H-TIO module.
Each AI alarm can be output as summary output (OR output) from the digital output block in
the H-PCP-A/B module. For details, refer to 3.3 H-PCP Module (P. 36).
The respective alarm (AI alarm 1/2) can be output independently for each channel by
connecting the H-DO-A/B/D module. For details, refer to 3.9 H-DO Module (P. 70).
Scaling function
This function is used to specify the display range (scaling) of the input value to the H-AI module.
[Example]
When the display range is scaled to 0 to 100 for a current input of 4 to 20 mA.
Display
Current input
100
0
4 mA
20 mA
ON area
Process high alarm
Process low alarm
ON area
Alarm setting
ON point
Alarm setting
ON point