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12.7
Operating range
Set the operating range as follows:
• Set the minimum speed within the range from fixed minimum
speed to user-set maximum speed.
• Set the maximum speed within the range from user-set
minimum speed to fixed maximum speed.
The range between the user-set minimum and maximum speeds
is the operating range. See fig. 41.
Fig. 41 Example of minimum and maximum settings
Factory setting
See section 29. Factory settings.
12.8 Limit-exceeded function
This function can monitor a measured parameter or one of the
internal values such as speed, motor load or motor current. If a
set limit is reached, a selected action can take place. You can set
two limit-exceeded functions, meaning that you can monitor two
parameters or two limits of the same parameter simultaneously.
The function requires setting of the following:
"Measured"
This menu/display/function allows you to set the measured
parameter to monitor it.
"Limit"
This menu/display/function allows you to set the limit which
triggers the function.
"Hysteresis band"
This menu/display/function allows/enables you to set the
hysteresis band.
"Limit exceeded when"
This menu/display/function allows you to set whether the function
is to activate when the selected parameter exceeds or drops
below the set limit.
• "Above limit".
The function is activated if the measured parameter exceeds
the set limit.
• "Below limit".
The function is activated if the measured parameter drops
below the set limit.
"Action"
If the value exceeds a limit, you can set an action. You can select
the following actions:
• "No action".
The pump remains in its current state. Use this setting if you
only want to have a relay output when the limit is reached. See
section 13.5 "Signal relays" 1 and 2 ("Relay outputs").
• "Warning/alarm".
A warning is given.
• "Stop".
The pump stops.
•"Min.".
The pump reduces speed to minimum.
•"Max.".
The pump increases speed to maximum.
• "User-defined speed"
The pumps runs at a speed set by the user.
Detection delay
You can set a detection delay which ensures that the monitored
parameter stays above or below a set limit in a set time before the
function is activated.
Resetting delay
The resetting delay is the time from which the measured
parameter differs from the set limit including the set hysteresis
band and until the function is reset.
Example:
The function monitors the outlet pressure from a CRE pump. If
the pressure is below 5 bar for more than 5 seconds, a warning
must be given. If the outlet pressure is above 7 bar for more than
8 seconds, reset the limit exceeded warning.
Fig. 42 Limit exceeded (example)
Factory setting
See section 29. Factory settings.
TM00 6785 5095
Fixed maximum speed
User-set maximum speed
Operating range
User-set minimum speed
Fixed minimum speed
24 %
13 %
0 %
67 %
100 %
TM06 4603 2515
Pos. Setting parameter Setting
1 "Measured" Outlet pressure
2 "Limit" 5 bar
3 "Hysteresis band" 2 bar
4 "Limit exceeded when" Below limit
5 "Detection delay" 5 seconds
6 "Resetting delay" 8 seconds
A "Limit exceeded function active" -
- "Action" Warning
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