INVENTIA MT-101, Руководство пользователя

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4.2.1. Binary inputs
The MT-101 Telemetry Module is equipped with 8 dedicated binary inputs marked as I1 –
I8 . The inputs support both positive and negative logic.
Additionally, up to 8 binary inputs are available if binary outputs, Q1 – Q8 , are configured
to work in the binary input mode. For design-related reasons, those inputs work exclusively
in positive logic.
The change of the input signal sets the alarm flag, connected with the corresponding binary
input
I1 – I8, Q1 – Q8 , respectively as BiIn0->1 , BiIn1->0 i Bi In Chg . The flags may be
used in rules processing.
Each of the binary inputs, I1 – I8, Q1 – Q8, may be configured independently also to
work in the counter or analogue mode. The use of binary inputs in these additional modes
will be presented further in respective sections of this manual.
4.2.2. Analog inputs
The MT-101 Telemetry Module is equipped with two 420 mA analog inputs marked as AN1
and AN2 . The inputs are isolated both from each other and from the rest of the device,
enabling the easy connectivity of the signal sources with different ground potentials. The
AN1, AN2 analog inputs are the only inputs with manually-set alarm levels, set by SET
buttons on the front panel of the device. This enables you to change the alarm level easily
without the need to use the MTM configuration program.
Additionally, users may create up to 16 analog inputs by reconfiguring binary inputs
I1-I8
and binary outputs Q1-Q8 to work in quasi/analog mode. After reconfiguration, all inputs
work in input signal frequency-to-analog conversion, so for proper operation, one has to
connect analog signal source via analog-to-frequency converter which outputs a square
wave of frequency proportional to analog signal. Input signal conversion range is
0-2kHz .
During configuration of analogue inputs, the user can set engineering units and precisely
rescale the input signal. The alarm levels and the time of input signal integration are also
configurable. The possibility to configure as much as four - and in the case of the
AN1 and
AN2 inputs five - alarm levels guarantees supervision flexibility of monitoring of analogue
signals.
Both alarms triggered by the analogue signal value (4) and the rate of signal change (2)
are available. As mentioned above, it is possible to define additional alarm levels for
AN1
and AN2 inputs manually by using buttons on the device front panel.
Additional information about manually/set threshold levels for A1 and A2 are described in
chapter SET buttons.
Analogue inputs have two parameters defined. They are Hysteresis and Dead band. The
value of hysteresis defines insensitivity of device for signal variations near threshold values
preventing excessive generation of events. The range of hysteresis allows generating event
only when the signal on the input changes by defined value. Hysteresis is set for all
selected analogue input alarm thresholds.
FLags
AnLoLo , AnLo , AnHi , AnHiHi , An DB , An Set Fall , An Set Rise , set by analogue signal
changes may be employed for rules processing.
4.2.3. Binary outputs
MT-101 Telemetry module is equipped with 8 dedicated binary outputs marked Q1....Q8 .
The state of outputs is set by writing desired value into a binary outputs memory register.