Nortec MES2 - Manual (Page 30)

27 | Operation
Ground Fault Interrupt (GFI) (J15)
Ground current leakage can occur when the humidifier performs drains. With jumper J15 the
MES2 can be configured to turn off the power to the electrodes whenever a drain takes place.
See Table 6 for correct jumper placement.
Modbus Control (J26)
The MES2 can be controlled via its Modbus interface. When configured for Modbus control the
MES2 ignores On/Off and modulation control inputs on its control terminal strip and operates
strictly based on data received via Modbus. The Modbus interface can also be used to make
some configuration changes and to read the status of the MES2. See Table 7.
J26 Removed – The Modbus interface is turned off and the humidifier operates based on
control inputs at its terminal strip.
J26 Installed – The Modbus interface is turned on. The humidifier will operate strictly based
on control inputs received via Modbus and can be configured and queried using the Modbus
interface.
Disable Self Test (P11, 2-3)
On start up the MES2 performs a self test that activates all outputs briefly including the remote
fault output. To disable the self test the jumper installed on P11 pins 2-3 can be installed.
Modbus Configuration
Contact Factory – 1-866-NORTEC-1.
Modbus Addresses
The following table lists the MES2 parameters that are available via Modbus. 4XXXX
parameters can be read and written by the Modbus master. 3XXXX parameters are read only.
Table 7: Modbus Addresses
Function Description Address Details
Output
Control OFF
Disables the humidifier and places the
humidifier in standby mode
ON
Enables the humidifier (humidifier will
operate based on the SET OUTPUT input) 40002 255: inhibit actions of humidifier
0: allow normal operation
Set Output Sets the desired steam output from 0-
100% This value shall be zero after a
microprocessor reset 40004 Remotely set humidity reading over
network. Value of 0 to 100 (per cent). If
no network signal for N minutes, reverts
to 0.