Honeywell Midas User Manual

Midas
®
Gas Detector
10-9
nvoStatus
The meaning of the status bits in this NVO is as
listed in Table 10-7.
Table 10-7. nvoStatus Implementation
LonMark Field
Name
Node Object
Intrpretation
Sensor Object interpretation
object_id (16 bits) 0
invalid_id ID > 1
invalid_request
unimplemented request
made
unimplemented request made
disabled disabled inhibited
out_of_limits
open_circuit
out_of_service
mechanical_fault instrument fault
feedback_failure
over_range alarm 2
under_range
electrical_fault maintenance fault
unable_to_measure
comm_failure communication failure to Midas
®
fail_self_test communication failure to Midas
®
self_test_in_progress warmup mode
locked_out
manual_control
in_alarm any alarm
in_override
report_mask mere capability report mere capability report
programming_mode
programming_fail
alarm_notify_disabled inhibit, warmup or calibration
reset_complete
nvoChkSum
This network variable indicates the checksum of
the neuron chip and is included to confirm the
correctness of the program. This will have the value
32533 for Revision 1.0 software. This is computed
45 seconds after power-up.

Honeywell Midas Specifications

General

Power Supply	24 VDC
Detection Technology	Electrochemical, Infrared
Sampling Method	Diffusion
Display	LCD
Communication	Modbus RTU, 4-20mA
Operating Temperature	-20°C to +50°C
Humidity Range	0% to 95% RH (non-condensing)
Target Gas	Multiple gases
Response Time	< 30 seconds
Operating Humidity	0% to 95% RH (non-condensing)
Outputs	4-20mA
Protection Rating	IP66
Certifications	ATEX, UL, CSA
Detection Gases	Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Methane (CH4), and others