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HE 5712 Operating Instructions
# 372048 | Version 1.4
7.
Operation of the Control
7.1
Normal Operation
Operation is started by applying the supply voltage. The valve cleaning is controlled via the
inputs and outputs of the device.
Current output
Note!
All valve outputs of a system refer to the same mass (-) (12, 14, 16). It is
permitted to use one ground line for several inputs.
11 Start
13 Postcleaning
15 Enable
12,14,16 mass (-)
As long as the start input (
START
) is closed, the valves
are controlled with the set control times. Prerequisite: The
enable input (
ENABLE
) is closed.
A push-button signal at the cleaning input (
POSTCL
)
starts the triggering of the valves with the set control
times. The number of cleaning cycles is specified in the
parameters (see chapter
6.2
Parameter Table
).
Prerequisite: The enable input (
ENABLE
) is closed.
To initiate cleaning, the enable input (
ENABLE
) must be
closed. Cleaning can be triggered by closing the start
input, a push-button signal at the post-cleaning input
(
POSTCL
) or by exceeding the upper differential
pressure threshold.
WARNING!
In test mode, valves can also be controlled
without release.
Operating or fault signal relay
In error-free operation, the contact between terminals 17,
19 and 20 is closed. If there is a fault, the contact
between terminals 18, 19 and 20 is closed.
The following causes lead to an error message:
Power failure (fail-safe operation)
Bus error
Device fault (parameter error)
valve errors
p-alarms
Note!
Post-cleaning is suppressed as long as precoating is activated.
