Nortec Modbus - Manual (Page 37)

The following points may be mapped for control:
Variable
Name
Description Addr Type Format Range Unit R/W Details
HumEnable
Configures
how
humidifier
responds to
modbus
controls
40003 Holding
Register Integer 0,255
- Write
0 = Disable operation of
humidifier (Default Value)
255 = Allow operation of
humidifier within limits
specified by CapLimit
Notes:
- If a valid Modbus
message is not received
within the timeout
windows, this parameter
reverts to 0.
- This value cannot be set
when the FORCE DRAIN is
activated as. FORCE
DRAIN temporarily sets
this to value 0.
- Jumper J26 must be
installed to write any
parameter over the
Modbus. J26 sets it into
the control mode.
- Opening of the
hardwired security loop
(terminals 1 and 2) will
override operation even if
255 is written.
CapLimit
Imposes a
maximum
output limit
as
percentage
of unit
capacity.
40004 Holding
Register Integer
25 -
100
% Write
Values outside of 25 -
100% return an error.
Default on startup = 25.
ForceDrain
Manually
initiates a
drain
period.
40005 Holding
Register Integer 0, 255
- Write
0 = Normal operation
(Default)
255 = Initiate a 20
minute timer during which
the drain is active.
Notes:
- During a force drain,
humidification ceases.
- Writing 0 during 20
minute period will cancel
the drain.
- After 20 minutes this
value will revert to 0 and
the humidifier will resume
normal operation.
ModAddress
Writes a
new
Modbus
address for
the
humidifier.
40201 Holding
Register Integer 1-255
- Write
Default = 1. Values of 1 -
255 are acceptable.
Changes to this variable
do not take effect until
the humidifier has been
power cycled.
34 |Modbus Installation