The "relays/controls" menu
72
After selecting this option, a further selection list appears. Select the alarm to which the
relay is allocated.
Selection:
– alarm relay
the relay is energized if an "alarm" type error is detected.
Continue by sections 5.1.7 and 5.1.11.
– diagnostics
a specific state of the instrument (e.g. loss of echo) can be allocated to the relay. The relay
becomes energized as soon as this state occurs.
Continue by sections 5.1.8 and 5.1.11.
– backwater alarm
The relay is energized if a backwater alarm is active.
This option is only available if the operating mode is "flow+backwater"
13)
.
Continue by sections 5.1.9 and 5.1.11.
– dirt alarm
The relay is energized if a dirt alarm is active.
This option is only available if the operating mode is "flow+backwater"
13
.
Continue by sections 5.1.10 and 5.1.11.
e. fieldbus (DO relay)
14)
(for Profibus DP instruments only)
After selecting this option, a further selection list appears. Select the DO block to which the
relay is to be connected.
No additional parametrization is required.
f. none
The relay is not used.
3. Now, the instrument switches back to the "relay N" (N= 1 ... 6) parameter set. Depending
on your selections, further parameters are now available which you can use to complete the
configuration. Details are described in the following sections.
5.1.3 "relay N" (N = 1 - 6)
(Parametrization of a limit relay)
"Limit type"
Use this parameter to define the type of limit.
Selection:
• standard
For this limit type, a switch on point and a switch off point have to be defined. The switching
behaviour depends on the relative position of these switching points.
a. switch on point > switch off point
The relay is energized if the measured value rises above the switch on point.
The relay is de-energized if the measured value falls below the switch off point.
b. switch on point < switch off point
The relay is energized if the measured value falls below the switch on point.
The relay is de-energized if the measured value rises above the switch off point.
13) The operating mode is set during the first setup of the instrument. It can be changed by "device properties/operating parameters/operating mode".
14) A fieldbus relay (DO relay) switches according to a binary value (e.g. from a SPS) which is connected to the DO block of the instrument.
⇒
relay 2 R2101
function: limit
limit type:
switch on point:
switch off point:
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