36
Electrical installation
Type 8746 Profibus, 8746 Analogue
Tab. 24: Actions triggered by the switching levels
Function
Action depending on the activated switching level
Level 1
Level 2
Level 3
Activation:
Short-circuit the digital input
with the digital-input ground
Activation:
1...4 V DC
(alternatively: not connected)
Activation:
5...28 V DC
MFC:
start autotune
Triggers the function
Not used
Not used
MFC:
actuator control
Triggers the closing of the
actuator
Triggers the normal operating
mode
Triggers the opening of the
actuator
MFM or MFC:
reset totalizer
Triggers the function
Not used
Not used
MFM or MFC:
gas selection
Changes to gas number 2
Changes to gas number 1
Changes to gas number 3
8.3.2
Relay output
The 5-pin M12 female connector has a relay output. The switching of the relay can show the following events:
•
MFC: The set-point value cannot be reached.
•
MFC: The product is doing an Autotune.
•
MFC: The
set-point value source
has changed.
•
MFM or MFC: A warning message has been generated. For example if the supply voltage is too high, then a warning message is
generated.
•
MFM or MFC: A failure message has been generated. For example if a sensor failure is detected, then a failure message is generated.
Tab. 25 shows the events that are assigned by default to the relay output of the 5-pin M12 female connector of an MFM or an MFC.
Tab. 25:
Default assignment of the relay output of the 5-pin M12 female connector
product variant analogue
default assignment
MFM
No assignment
MFC
The set-point value cannot be reached
English
Summary of Contents for 8746
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