MDT AMI series Technical Manual page 41

Technical Manual Switch Actuators AMI/AMS
The available settings for a load monitoring are shown at the following chart:
ETS‐text
Factor for load monitoring
x100mA
Hysteresis %
Behavior at
exceeding/deviating
Behavior at not
exceeding/deviating
Send exceeding/deviating
cyclical
Table 33: Monitoring exceedance/deviation of load
The reference value for the observation is set by the parameter "Factor for load monitoring". The
adjusted value is multiplied with 100mA, so the value can be adjusted in the range of 0,1A to 20A
with 100mA steps. The hysteresis, which is indicated in % of the reference value, can avoid a too fast
switching. At the monitoring exceedance of load, the hysteresis is subtracted from reference value.
At the monitoring lower deviation of load, the hysteresis is added to the reference value. But the
switch‐on value is always the same as the reference value only the switch‐off value is calculate by the
upper way:
So, for a hysteresis of 10% and a reference value of 1A, the following switching points will result:
At the exceedance of load, a value is sent at exceedance of 1A, which only is reset when the value
deviates above 0,9A.
At the deviation of load, a value is sent at deviating 1A, which only is reset when the value exceeds
above 1,1A.
The sending conditions of the according communication object can also be adjusted. The telegram
can send as well on‐telegrams as off‐telegram for the different cases. Additional the object can sent
no telegram. Also, a cyclic sending can be activated.
The following chart shows the relevant communication objects:
Number Name
12 Exceedance of load
13 Lower deviation of load
Table 34: Communication objects load deviation/exceedance
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Dynamic range
[default value]
1‐200
[1]
10‐100
[10]
 Send no telegram
 Send On‐telegram
 Send Off‐telegram
 Send no telegram
 Send On‐telegram
 Send Off‐telegram
 not active
 15min
 30min
 60min
 90min
 120min
Length Usage
1 Bit reports an exceedance of load
1 Bit reports an deviation of load
comment
adjusts the reference value for the
monitoring of load
Adjustment of the hysteresis for
avoiding to fast switching
Adjustment of the behavior, when the
measured value is out of the adjusted
range
Adjustment of the behavior, when the
measured value is in the adjusted range
Activation and adjustment of the time
step for a cyclic sending