Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 19)

<4. GETTING STARTED>
4-6
IM 11M12D01-61E
4.7 Generating Alarms
If the host is able to receive alarms, then enable alarm capture on the host and generate an
alarm from the AV550G to test this. At the time of shipping from the factory, virtual communication
relationship VCR-7 of AV550G is set up for this purpose. Default setting is for all alarms to be disabled.
Try enabling one alarm as follows: Set the value of link object 3 (index 30002) to (0, 299, 0, 6, 0).
Refer to Sec. 5.6.1 Link Objects.
Set the AI block LO_PRI parameter (index 4029) to 0, then try setting this value to 3. From the host,
select Write and specify the index or the variable name and write the value 3 to it.
The LO_LIM parameter (index 4030) of the AI block sets the low limit alarm value.
Normally this is set to a very small value. Here we set it to slightly under 100% of XD_SCALE (same
units as XD_SCALE) in order to generate an alarm. Since the flow is zero, a low limit alarm is
generated. We can confirm if the host receives this alarm. If we Confirm (Acknowledge) this alarm, the
alarm stops.