Endress+Hauser RIA452 Betriebsanleitung Seite 81

RIA452
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Function (menu item)
Function
Level
Sampl. time
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6.3.4 Digital input - DIGITAL INP./M5
The settings for the digital status inputs, e.g. for monitoring pumps, starting/stopping the counter
or resetting the min/max-value memory are grouped in this section.
Note!
– The digital inputs 1 to 4 are permanently assigned to relays 1 to 4 in the PUMP function. Relay 1
is monitored by digital input 1, relay 2 by digital input 2 etc.
– When the "Batch" function is used, digital input 1 is permanently assigned to a preset value count
function. Configuration for this digital input is then not possible.
Parameter setting
Off
Pump
Res Tot.
Start/Stop
Res MinMax
Low
High
0..99
0
Pump monitoring function
The digital inputs 1-4 are permanently assigned to each relay 1-4. If the function of the digital input
is set to pump monitoring, the sampling time starts when the relay is switched on. The pump relay
remains picked up if pump feedback is activated at the digital input within the defined sampling
time. Otherwise, the relay is switched off immediately and a fault message is output. Similarly, a
pump that is already active is switched off if the digital status signal changes during the time the
pump is running.
If the alternate function for this relay is activated, a relay with an alternate function is also searched
for and switched on.
Description
Function of the selected digital input.
• Off
• Pump = pump monitoring (see Pump monitoring function)
• Res Tot. = reset the totalizer*
• Start/Stop = start or stop the totalizer*
• Res MinMax = reset the min/max memory values
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Note!
Parameters marked with an asterisk (*) are only available for the pulse output
option if this function has been configured.
Selects the side for evaluation.
• Low = descending side
• High = increasing side
Defines the time (in seconds) within which pump feedback at the digital input is
to be expected. If there is no feedback within the defined time, an error message
is generated and a second pump is activated if more than one pump is available.
Commissioning
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