When 1A00 = 1 configure output:
0 = Heating/reverse
1 = Cooling/direct
2 = Heating and cooling (2 pipe)
3 = Transmit set point
When 1A00 = 4 Manual positioning or time schedule controlled
0 = Time schedule only
1 = Manual positioning and by time schedule
When 1A00 = 5, select input (0 = function disabled):
1 = 1T, 2 = 1H, 3 = 1U, 4 = 2T
➔ Set jumpers on the back of the controller: 0...10 VDC (default), or 0...20 mA. Further define analog outputs with A02.
Custom ranges can be created by setting minimum and maximum signal limits.
➔ A control loop, special function, digital control or analog control sequence is not active until it is assigned an output.
➔ Low and high limit alarms are defined with input parameters. With output parameters assign an
alarm to an output and select output state. The required output for each alarm can be
individually selected. Multiple alarms can be signed to one output. If one alarm is selected to
simultaneously activate and deactivate an output, the one to de-activate has precedence.
➔ With manual positioning (1A00 = 4) position the output by time schedule or directly in 0.5%
steps. Setting 1A01 to 0 will disable manual positioning. The output will then only be controlled by time schedule.
➔ With dehumidifying (1A00 = 3) the maximum value is taken of cooling and dehumidifying. When the humidity is too
high, cooling will continue to operate, even without a demand for cooling, to dehumidify the air and heating will
activate to maintain comfort.
➔ Input values of inputs and set points of control loops may be transmitted on the analog outputs.
➔ For VAV function individual minimum and
maximum limits may be assigned for cooling
and heating. In VAV applications maximum
cooling output matches the maximum air
volume the VAV box is set to deliver. As
demand for airflow in cooling mode decreases,
airflow dwindles until it reaches minimum
cooling output (1A05). This minimum will be
based on the airflow needed at design cooling
and is typically 10% to 15% of maximum
cooling airflow. When this minimum is
reached the system is in dead-band – neither
heating nor cooling. Minimum airflow in
heating mode is set with 1A03. As the system
moves into heating mode, heating airflow
increases until it reaches the maximum
heating output (1A04), typically 30 to 50% of
maximum cooling airflow.