Endress+Hauser RIA452 - Page 27

RIA452 Commissioning
Endress+Hauser 27
Function
(menu
item)
Parameter setting Description
Ref. num. Input
Lin. table
Selects which value is used:
• Input: scaled value from analog input
• Lin. table = value from linearization table or current
flow rate for calculation of channel
Function Off
Min
Max
Grad
In band
Out band
Alarm
Alarm inverse
Selects limit value and fault monitoring. In the event of
device errors or incorrect input values (see error limits
Range 1 to 4 → ä 40), the relays are switched in
accordance with the failsafe mode configured in Rel.
Mode (→ ä 40).
• Min: minimum with hysteresis (→ ä 28)
• Max: maximum with hysteresis (→ ä 28)
•Grad: gradient (→ ä 29)
• In band: validity range within two values
• Out band: validity range outside of two values
• Alarm: relay is used as an alarm relay
• Alarm inverse: relay is used as an alarm relay; the
relay behaves in a safety-oriented manner with the
result that it is de-energized if the power supply fails
or if the display unit has a fault.
Dec. point XXXXX
XXXX.X
XXX.XX
XX.XXX
X.XXXX
Number of digits after the decimal point for the limit
value.
Setpoint A -99999 to 99999
0.0
Measured value at which a change in the switch status
occurs (slope for gradient). Default: 0.0
Setpoint B -99999 to 99999
99999
The second setpoint can be configured for the "In band"
and "Out band" operating modes and is only visible if
one of these two functions was selected for this relay.
Hysteresis -99999 to 99999
99999
For entering the hysteresis for the threshold at
minimum/maximum as an absolute value.
Delay 0 to 99
0
Sets the limit value event delay once the threshold is
reached (in seconds) (→ ä 30).
Alternate No
Yes
Determines the switching function for this relay:
• No: no alternating function; switch point
permanently assigned to relay
• Yes: alternate function (→ ä 31)
Relays 1-4 can be used for the alternate function.
Sw. delay 0..99
0
The starting time for 24-hour counting can be selected
with Sw. delay. Every time the instrument is reset, the
process of measuring 24 hours and the delay time is
restarted.
Example → ä 30
Sw. period 0..999
0
Limit value is activated cyclically every 24 hours for 0-
999 seconds. The activation is delayed by [Sw.delay]
hours by changing the hour value (example → ä 30).
Runtime Displays the run time of the connected device, e.g.
pum
p, in hours [h].
Count Records the switching frequency of the limit value.