Siemens SENTRON ATC6300 Manual page 61

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The limits thresholds can be defined in Menu P13 (see chapter P13 - User limits
(Page 140)).
In order to simplify the specification of limits that can have a very wide range, each limit is to
be set with a basic value and a multiplication factor (example: 400 x 1 = 400).
For each LIM two thresholds are available (one upper and one lower). The upper threshold
must always be set to a higher value than the lower one. The following functions can be
defined for exceeding the upper and lower thresholds of the limits:
Min function
In the Min function the lower threshold defines the trip point, while the upper threshold is for
resetting. If the value of the selected measurement falls below the lower threshold, the
device is tripped after the set delay time. If the value of the measurement exceeds the upper
threshold, the device is reset after the set delay time.
Max function
In the Max function the upper threshold defines the trip point, while the lower threshold is for
resetting. If the value of the selected measurement exceeds the upper threshold, the device
is tripped after the set delay time. If the value of the measurement falls below the lower
threshold, the device is reset after the set delay time.
Min+Max function
In the Min+Max function, both the upper and lower thresholds are for tripping. If the value of
the selected measurement falls below the lower threshold or exceeds the upper threshold,
the device is tripped after the set delay times.
As soon as the measured value is within the limits again, the device is immediately reset.
Depending on the setting, tripping denotes either activation or deactivation of the LIMn limit.
If the LIMn limit is configured with a memory, the reset must take place manually, using the
dedicated command in the command menu.
The user limit thresholds can be viewed on the device if they have been activated (see
chapter P13 - Limit thresholds (Page 140)).
3KC ATC6300 transfer control device
Manual, 03/2018, L1V30535632002A-01
Functions
5.2 Extended functions
59