Licht MFC-300/IT Manuale utente
Temperature Indicator/Transducer
model MFC-300/IT
Technical Manual
Licht
Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 1
Contents
1 Introduction 2
2 Front panel indication 3
3 Configuration 4
3.1 Parameter reset 4
4 Programmable parameters 5
4.1 General parameters 5
4.2 Current outputs (option) 5
4.3 MODBUS protocol 5
4.4 DNP3 protocol (option) 6
4.5 Language 7
5 Additional versions 8
A Specifications 9
B Housing diagrams 10
C Weatherproof enclosure layout 13
D Connection diagrams 14
E MODBUS registers 17
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 2
1 Introduction
The MFC-300/I-T is a precise, highly reliable and versatile microcontrolled device de-
signed to read, display and retransmit temperature values. Each MFC-300/I-T features
one isolated RS-485 port, which can be used for communication using the MODBUS or
DNP3 protocols.
All signals that enter and exit the indicator are galvanically isolated, preventing po-
tentially damaging noise and transients from being transferred between subcircuits or
retransmitted to other devices.
Figure 1.1 MFC-300/I-T Indicator
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 3
2 Front panel indication
During operation, the MFC-300 displays its temperature measurement.
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MULTI FUNCTION CONTROLLER
MFC-300/I-T
R 1 R 2 R 3 R 4 R 5 R 6 R 7 R 8 R 9 R 10 R 11 R 12 R 13 R 14
C
P
RTD 1: 63.0 C
RTD 2: 86.4 C
RTD 1: 124.4 Ohm
RTD 2: 133.3 Ohm
Indication mode:
Resistance
Indication mode:
Temperature
Figure 2.1 Front Panel
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 4
3 Configuration
Parameterization
The MFC-300 features 4 keys to access its functions. The procedure to configure any
parameter is as follows:
1. Press the Pkey to enter the parameters menu.
2. Enter the currently configured 4 letter password one letter at a time, using the ↑
and ↓keys to select each letter and Pto advance between letters. The default
password is AAAA.
3. Using the ↑and ↓keys, choose the desired parameter.
4. Press Pto confirm the parameter’s selection.
5. Choose the desired value with the ↑and ↓keys.
6. Confirm pressing P.
By holding down the ↑or ↓keys it is possible to advance through the options faster.
The configuration sequence can be cancelled at any time by pressing C.
3.1 Parameter reset
The MFC-300 can be reset to factory settings. This procedure also resets its password to
AAAA. To do so, power up the device while pressing C.
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 5
4 Programmable parameters
The MFC-300/I-T were developed to provide the user with the greatest possible flexiblity,
such that all supervision and configuration can be executed on-site or remotely through
the existing communication channels.
We define all user-configurable parameters below.
4.1 General parameters
Parameter:Indication Type
Options: Temperature, Resistance.
Description: data type indicated on the display.
4.2 Current outputs (option)
Parameter:Output Scale
Options: 0-1, 0-5, 0-10, 0-20, 4-20 mA
Description: refers to the various configurable current loop scales.
Parameter:Full Scale Temperature
Options: 0 to 255 ◦C, in increments of 1 ◦C.
Description: Current loop full scale temperature. For example, if Full Scale Tempera-
ture = 150 ◦Cand Output Scale = 4-20 mA, the displayed temperature will be 0 ◦Cfor
4.0 mA and 150 ◦Cfor 20.0 mA.
4.3 MODBUS protocol
Parameter:Baud Rate
Options: 9600, 19200, 38400, 57600, 115200 bps.
Description: baud rate for the RS-485 link.
Parameter:Format
Options: 8N1, 8E1, 8O1, 8N2.
Description: symbol transmission format, where:
◦8N1: 8 data bits, no parity, 1 stop bit.
◦8E1: 8 data bits, even parity, 1 stop bit.
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 6
◦8O1: 8 data bits, odd parity, 1 stop bit.
◦8N2: 8 data bits, no parity, 2 stop bits.
Parameter:Address
Options: 1 to 247.
Description: MODBUS address for the MFC-300.
4.4 DNP3 protocol (option)
Parameter:Baud Rate
Options: 9600, 19200, 38400, 57600, 115200 bps.
Description: baud rate for the RS-485 link.
Parameter:Format
Options: 8N1, 8E1, 8O1, 8N2.
Description: symbol transmission format, where:
◦8N1: 8 data bits, no parity, 1 stop bit.
◦8E1: 8 data bits, even parity, 1 stop bit.
◦8O1: 8 data bits, odd parity, 1 stop bit.
◦8N2: 8 data bits, no parity, 2 stop bits.
Parameter:Address
Options: 0x0000 to 0xFFEF.
Description: DNP3 outstation address in hexadecimal notation.
Parameter:Application Layer Confirmation
Options: Only when transmitting events or multi-fragment responses, Always.
Description: Selects when the MFC-300 outstation should request application layer
confirmations.
Parameter:Maximum Inter-Octet Gap
Options: 2 to 100 ms.
Description: The DNP3 specification states that frames should not have inter-octet
gaps. In accordance, the MFC-300 never inserts inter-octet gaps when transmitting data.
However, we allow the option to tolerate gaps in incoming transmissions. Frames featuring
inter-octet gaps larger than the Maximum Inter-Octet Gap will be quietly dropped.
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 7
Parameter:Backoff Delay (Fixed)
Options: 1 to 100 ms.
Description: See description for Backoff Delay (Random).
Parameter:Backoff Delay (Random)
Options: 1 to 100 ms.
Description: The MFC-300 is designed for multi-drop scenarios where more than one
outstation may transmit over the same line. To handle collision avoidance, a backoff
scheme is implemented. Before transmitting, the MFC-300 always waits for the line to
become idle. Once that happens, it waits for Tdelay =Tf ixed +Trandom ms, where Tfixed
is the fixed backoff delay and Trandom is a random value, uniformly distributed between 0
and the random backoff delay parameter. If after Tdelay ms the line is still idle, then the
MFC-300 begins transmission.
Parameter:Insert Inter-frame Gap
Options: Never, Always.
Description: The DNP3 specification states that no inter-frame gaps are required. How-
ever, some masters have been observed to drop frames when no inter-frame gaps are pro-
vided. This option allows communicating with such non-compliant devices. We discourage
its use, given that the forced inter-frame gap implies a forced backoff-delay.
4.5 Language
Parameter:Language
Options: Portuguese (PT_BR), English (EN_US).
Description: Language of the messages and menus displayed on the MFC-300’s front
panel.
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 8
5 Additional versions
Figure 5.1 MFC-300/I-T Indicator (96x96 version)
Figure 5.2 MFC-300/I-T Indicator (with weatherproof enclosure)
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Rev. A1 (18–01–12) MFC-300/I-T Technical Manual 9
A Specifications
Power Supply Isolated, 80-260 Vac/Vdc.
Power Consumption 8W
Operating Temperature -10 to 70 ◦C(LCD display)
-40 to 70 ◦C(VFD display)
Enclosure Rating IP20 (96x48 and 96x96 formats)
IP65 (with weatherproof enclosure)
Mounting Options Panel-mounted
Dimensions 96 x 96 x 190 mm or
96 x 48 x 190 mm
Weight 550 g
DC Input Scale: specifiable
Error/Non-linearity: 0.2% + 0.1% /10 ◦C
AC Input Scale: specifiable
Error/Non-linearity: 0.5% + 0.1% /10 ◦C
Current Outputs Scales: 0-1, 0-5, 0-10, 0-20, 4-20 mA
Error/Non-linearity: 0.2% + 0.1% /10 ◦C
Galvanic Isolation
(60 Hz, 1 min.)
DC Input 1.5 kV
AC Input 1.5 kV
Outputs 1.5 kV
Communication 1.5 kV
Communication RS-485 - MODBUS RTU or DNP3
9600, 19200, 38400, 57600, 115200 bps
8N1, 8E1, 8O1, 8N2
Displays 2 lines with 16 characters each (5 mm).
LCD with backlight or VFD.
Indice
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