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2.7
Output3
Output3 may be used as a digital signal output or as an analogue 4-20 mA current output.
When used as a digital signal, it may be used as a fast pulse signal (0 - 1000 Hz) for external
counter circuits (see scaling example in chapter 6), or it may be controlled directly via P-NET.
Further details for connecting Output3 can be found in section 5.3.2 Output3.
2.8
Input
The transmitter has a logic input, Input1, which can be selected for one of several functions:
•
Stop counters. The signal may be derived from an air detector, and is then used to
make the transmitter stop counting, when there is air in the liquid.
•
Clear Volume2 counter. The input can be used in batch control, to start the Batch func-
tion and clear the batch volume counter.
•
Manual/Automatic mode for PI controller. The input can be used to set the operation
mode for the PI controller.
(See configuration of function selector
Further details for connecting Input1 are found in chapter 5.4 Input signal.
2.9
P-NET Interface
The extended version of the Flow Transmitter utilizes a P-NET fieldbus communication inter-
face, which enables the Flow Transmitter to be connected directly to a P-NET fieldbus net-
work designed for process control and data-collection. P-NET is an international standard
(IEC 61158 Type 4).
Through P-NET it is possible to display and change all the internal data within the Flow
Transmitter
(see a complete list in the Variable
The PD 4000 Flowmeter-Display utilizes the P-NET interface for data exchange between the
Flowmeter-Display and connected Flow Transmitters. It is possible to change data and to
select various functions in each Flow Transmitter. The memory in the Flowmeter-Display is
equipped with a battery backup, which will hold the measured data during a power failure.
The P-NET interface may also be used for data collection, e.g. by a PC. The PC can be
equipped with a P-NET interface device, which makes it possible to directly access any vari-
able in the Flow Transmitter and other connected P-NET modules while running a PC pro-
gram.
2.10
PD 210 display unit
The PD 210 is a local display unit, which is connected directly to the Flow Transmitter. From
this unit it is possible to display the flow rate, volume counters, temperature, setpoint etc. Fur-
thermore the PD 210 display unit may be used to change setpoint values and to perform a
complete configuration of the Flow Transmitter (see description in section 3).
Manual
Code3).
Description).
Flow Transmitter, PD 340
502 010 05
13/55
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