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Safety Manual
00809-0100-4310
5
Output
5.1
Alarm and fault outputs
Sensor alarm and fault outputs are generated by the Millennium II series transmitters
based on communication with sensors, however some output values, registers, etc, may
vary depending on sensor type. The default alarm levels (point) for the sensor are: 20
percent for the low level and 40 percent for the high level.
5.1.1
Other available outputs
All available outputs are associated with the Millennium II series transmitters. These
outputs are: 4-20 mA output, Relay output, RS 485 Modbus
communication output. Refer to the
Millennium II Transmitter manual
5.1.2
Modbus
Table 5-1
Table 5-1: Modbus Registers and Meaning
Reg #
40001
40002
40003
40101
40102
40104
Note
For the Millennium II Basic Transmitter enter '1' in register 40102 to calibrate the sensor
and '1' in register 40104 to zero the sensor.
Net Safety SC310
for more information.
®
registers
below, shows the user accessible Modbus registers and meaning.
Meaning
Concentration value as calculated by sensor
Sensor status
Sensor temperature
Resets the sensor
Initialize zero and span *( to calibrate sensor, enter
channel #)*
Zero only *(to zero sensor, enter channel #)*
®
(RTU) output, and HART
Millennium II Basic Transmitter manual
Output
May 2021
®
or the
Readable
Writeable
X
N/A
X
N/A
X
N/A
N/A
X
N/A
X
N/A
X
19
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