Endress+Hauser RIA452 Manuel De Mise En Service page 70

Commissioning
Function (menu item)
Ref. num.
Function
Dec. point
Setpoint A
Setpoint B
Hysteresis
Delay
Alternate
24h
Runtime
Count
Reset
Simu relay
70
6.3.5 Limit values - LIMIT 1...8/M10...17
Parameter setting
Input
Lintab
Min
Max
Grad
In band
Out band
Alarm
XXXXX
XXXX.X
XXX.XX
XX.XXX
X.XXXX
-99999...99999
-99999...99999
-99999...99999
0...99
No
Yes
0...60
No
Yes
Off
Low
High
Description
Selects which value is used:
• Input: scaled value from analog input
• Lintab: value from linearisation table
Selects limit value and fault monitoring. The relays are currentless in the event of
device errors or incorrect input values (see error limits range 1...4 in
Section 1.3.11).
• Min: minimum with hysteresis (see Fig. 16)
• Max: maximum with hysteresis (see Fig. 17)
• Grad: gradient (see Fig. 18)
• In band: validity range within two values
• Out band: validity range outside of two values
• Alarm: relay is used as an alarm relay
Number of digits after the decimal point for the limit value.
Measured value at which a change in the switch status occurs (slope for gradient).
Default: 0.0
The second setpoint can be configured for the "In band" and "Out band" operating
modes.
For entering the hysteresis for the threshold at minimum/maximum.
Sets the limit value event delay once the threshold is reached (in seconds)
(see Fig. 19).
Determines the switching function for this relay:
• No: none; switch point permanently assigned to relay
• Yes: alternate function (see Fig. 20)
Limit value is activated cyclically every 24 hours for 0...60 min.
Displays the run time of the connected device, e.g. pump, in hours [h].
Records the switching frequency of the limit value.
Resets the run time and switching frequency for this limit value.
Simulation of the selected limit value. Is automatically set to OFF when exited.
RIA452
Endress+Hauser