Hired-Hand Farm Hand Series: Vent Master 16 Stage - Manual (Page 15)

Part No. 4801-5098 Farm Hand Vent Master 12
P31 – High Temperature Limit
The outside temperature the controller will use in determining the low range of
its limits.
P32 – High Temperature Target Pressure
The target pressure when the outside temperature is at the high temperature
limit.
P34 – Low Temperature Limit
The outside temperature the controller will use in determining the high range
of its limits.
P35 – Low Temperature Target Pressure
The target pressure when the outside temperature is at the low temperature
limit.
9.5 Pressure Alarm Parameters
P60 – Low Pressure Alarm
The Low Pressure alarm will send a signal when pressure drops below the Low
Pressure setpoint for greater than 45 seconds. This alarm warns if the vents
failed to close for some reason. Setting the Low Pressure alarm setpoint to
“OFF” prevents the alarm from sounding.
P61 – High Pressure Alarm
The High Pressure alarm will send a signal to your existing alarm system in the
same manner as the Low Pressure alarm, but only when pressure exceeds the
High Pressure Setpoint for greater than 45 seconds. (High Negative Pressure.)
This alarm warns if the vents did not open for some reason. Setting the alarm
setpoint to .20 ”OFF” prevents the alarm from sounding.
P63 – Cycle Pressure Alarm
The cycle alarm is a very important alarm in that it will warn if your timer fans
failed to operate. The controller will look for a pressure surge which would
normally be caused when the timer fans turn on. If this pressure surge is not
sensed within the timer period you specify, the controller will signal your alarm
system, thus triggering an alarm. Setting the value of this limit to “OFF”
prevents the alarm from sounding.
9.6 PC Compatible Network Parameters
This option requires Hired-Hand’s Farm Manager Software. The controller has three functions
which are used to set it up on the Hired-Hand PC compatible inter-controller network (HHNet).
These are:
P40 - HHNet Address
HHNet allows you to connect up to 32 controllers on a single communications
port of your personal computer (PC). In order for the computer to recognize the
communications from the controllers, each controller must have a unique address.
For example, if you have two Vent Masters, and two Power Vents you would need
to set the first Vent Master to be address 1, the second Vent Master to address 2,
the first Power Vent to address 3, and the second Power Vent to address 4. Valid
settings are 1 - 32. (You do not have to address the controllers in any particular
order.)
P41 -- Version Number
This is not settable. It is the version of controller software.
P42 -- Controller Type
This is not settable. It is a unique number that allows the network software
(Farm Manager) to know the type controller.