
53
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
With one measured value
With two measured values
Diagr. Supervision of limits with two limits
Limit 1
Limit 2
Measured
value
Threshold output
t
t
Threshold output
t
t
Limit 2
Measured
value 2
Limit 1
Measured
value 1
Limit 1
Limit 2
Measured
value
Threshold output
t
t
Threshold output
t
t
Limit 2
Measured
value 2
Limit 1
Measured
value 1
Limit 1
Limit 2
Measured
value
Threshold output
t
t
Threshold output
t
t
Limit 2
Measured
value2
Limit 1
Measured
value 1
Limit 1
Limit 2
Measured
value
Threshold output
t
t
Threshold output
t
t
Limit 2
Measured
value 2
Limit 1
Measured
value 1
Limit supervision of
two limits
Case 2.1
Case 2.2
Case 2.3
Case 2.4
t
t
t
Case 2.5
Case 2.6
Case 2.7
Case 2.8
AND
Hysteresis
Hysteresis
Within
Out of
AND
AND
AND
Exceeding
Underscoring