Nortec Modbus User Manual download pdf (Page 19)

Control Signal Setting

By default the humidifier operation is configured on a hardwired control signal supplied through

the unit terminal strip. This can be changed to allow the humidifier to function entirely through

its Modbus interface.

To adjust this setting:

Press the Menu key to access the menu.

When prompted for a password, enter 0335 using the arrow keys. Confirm the password

with set.

Select the Control Settings menu and press the Set key. The following settings can be

adjusted:

Source

Analog: Use hardwired control signal

Digital: Write control signal through Modbus interface

REG Mode

Demand: Use a demand control signal

RHp: Use a sensor value and proportional

RHpi: Use a sensor value and proportional-integral control band

MOD Mode

Single CH: Use a signal channel control signal

Dual CH: Use a dual channel control signal

CNT Type Setting not relevant when writing control signal through Modbus.

Note:

Refer to the CONTROL SETTING section of the NH Series Installation and Operation

Manual for more information on the above settings.

Press Esc repeatedly to return to the home screen when complete.

This procedure is summarized below:

Menu > 0335 > Control Settings >

Source: Analog or Digital

Reg Mode: Demand, RHp, or RHpi

Mod Mode: Single CH or Dual CH

CNT Type: As required

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Nortec Modbus User Manual Page 19