Danfoss m2 User Manual

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 17
Setting the Units of Measurement
Defrost Interlock Point
Setting the Alarm Settings
Ana Remote analogue input and m2+ units.
EKC EKC - Controllers
CTL Third Party Controllers
* The 4-20 mA input is passive. It requires an external 12-24 V isolated power
supply. Default settings are 0 to 100% (0=4mA and 100=20 mA). Zero and
full scale can be modied via the second Point Setup screen. Values can be
between -99 and 999. Applications of 4-20 mA can be for pressure tranducers,
temp, ow, humidity, level, etc.
To set the units of measurement, repeatedly press ‘↵’ to cycle through the elds
until the Units eld is highlighted.
Enter the units required using the ‘ ’ or ‘ ’ keys to cycle through the character
list and the’ ' or ‘ ’ key to move the cursor left or right respectively.
Note: This is a text eld only and does not eect the operation of the system. It
will not be available if DNO, DNC, ENO or ENC is selected.
You can use the ‘ ‘ and ‘ ’ keys together to delete the character before the
cursor and ‘ ‘ to change case. When the units have been set, press ‘↵’. The edit
box will move onto the next eld.
Select the point to be used for defrost as previously described. Use the ‘ ’ or
‘ ’ keys to alter the point type code, if necessary, to “Dno” (defrost interlock,
normally-open relay) or “Dnc” (defrost interlock, normally-closed relay).
Select the point to be interlocked to the defrost and repeatedly press ‘↵’ to
cycle through the elds until the Def Int Pt eld is highlighted. Use the ‘ ’ or ‘
’ keys to alter the point number to the defrost input.
For example, if probe 1 is a temperature probe and point 16 is a defrost input
contact, set 16 as the defrost interlock in probe 1’s settings.
Select the point as previously described. Repeatedly press ‘↵’ to cycle through
the elds until the High eld is highlighted. Set this eld to set the value
at or above which an alarm will occur by using the ‘ ’ or ‘ ’ keys to cycle
through the character list and the ‘ ’ or ‘ ’ key to move the cursor left or right
respectively. When the high temperature alarm point has been set, press ‘↵’.
The edit box will move onto the next eld.
Repeat the operation for the Low eld, to set the value at or below which an
alarm will occur. Press ‘↵’ to move the edit box onto the next eld. Repeat the
operation for the Delay eld. Set the length of time (in minutes) that the fault
must be present before an alarm is raised.
Select the point as previously described, then repeatedly press ‘↵’ to cycle
through the elds until the Action eld is highlighted. The status display shows
the alarm action number. Use the ‘ ’ or ‘ ’ keys to set the required alarm
actions. These alarm actions can then be set to carry out the desired functions.
For example, point number 3 could be set to have alarm action 1 which sets the
siren and dials out to a modem. Whereas, point number 4 could be set to alarm
action 2 which sets the siren, dials out to a pager as well as the modem, etc.
The alarm actions are as follows:
0 Turns the alarm o.
1 - 8 Sets alarm actions 1 to 8.
Setting the Alarm Action

Danfoss m2 Specifications

General

Brand	Danfoss
Model	m2
Category	Control Systems
Language	English