Commissioning RIA452
26 Endress+Hauser
G09-RIA452ZZ-16-10-xx-en-007
Event 1 shows uninterrupted operation of pump 1. Pump 1 is activated upon request due to
a limit value violation. The status signal at DI1, which changes within T, indicates that the
pump is operating correctly, pump 1 continues pumping.
In event 2, there is no feedback at DI1 after pump 1 is activated and thus this pump is taken
to be faulty. The alarm relay is activated and an error message is output on the display.
Pump 2 takes over pumping, event 3. This pump provides feedback at DI2 within the defined
waiting time. Pumping continues until the limit value violation is undershot.
A new limit value violation occurs in event 4. A new attempt is made to start pump 1 due to
alternating pump control. Pump 2 takes over as, once more, there is no feedback after the
waiting time elapses (event 5). If the alarm relay and error message were not already active
on the display, they are now.
In event 6, the level is exceeded once more and a pump is requested. Following alternating
pump control, pump 1 is tried again. This time, feedback is from pump 1. The alarm relay is
reset.
In event 7, the error message is acknowledged on the display. The status signal at the DI has
no effect on the acknowledgement of the error message on the display.
The following parameters must be configured:
6.3.5 Limit values - LIMIT 1 to 8/M10 to 17
A faulty pump is always restarted depending on the signal at the relevant digital
input. Acknowledgement of the error message on the display has no effect on the
pump resuming operation.
If a pump is faulty for more than 10 minutes, an attempt is made to restart it when
the limit value is violated.
Menu Function (menu item) Setting value
DIGITAL INP./M5 Function
Level
Sampl. time
Pump
Low or High
Sampling time in seconds
LIMIT 1 to 8 Alternate Yes
If the "Batch" function is used, limit values 1 and 2 are permanently assigned
activation in the event of a "preset counter" and "preliminary alarm" limit value. These
limit values cannot be configured. They are not shown in the menu structure.
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