Licht MFC-400/I-IAC, MFC-400/I-IDC Technical Manual

Current Indicator/Transducer

mo del MFC-400/I-IAC and I-IDC

Technical Manual

Licht

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

A Specifications 8

B Connection diagrams 9

C MODBUS registers 13

Rev. A1 (20–05–09) MFC-400/I-IAC and I-IDC Technical Manual 1

http://www.licht-labs.com

Licht

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1 Introduction

The MFC-400/I-IAC and MFC-400/I-IDC are precise, highly reliable and versatile mi-

crocontrolled devices designed to read, display and retransmit AC or DC current values.

They feature one isolated RS-485 port, which can be used for communication using the

MODBUS or DNP3 protocols.

Signals that enter and exit the indicator are galvanically isolated, preventing potentially

damaging noise and transients from being transferred between subcircuits or retransmitted

to other devices.

Figure 1.1 MFC-400/I-IAC and MFC-400/I-IDC Indicators

Rev. A1 (20–05–09) MFC-400/I-IAC and I-IDC Technical Manual 2

http://www.licht-labs.com

C

P

R1 R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

MFC-400/I-IAC

MULTI FUNCTION CONTROLLER

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www.licht-labs.com

R12 R13

Input 1

3.12 A

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2 Front panel indication

During operation, the MFC-400/I-IAC and MFC-400/I-IDC alternate between each in-

put’s current indication. The presented value is equal to the measured current multiplied

by the Sampling Factor parameter.

If more than 2 inputs are used, a timer automatically changes the channels on display.

The user may manually alter the currently displayed channel (skipping the alternation

timer) by pressing the ↑ or ↓ keys.

Figure 2.1 Front Panel

Rev. A1 (20–05–09) MFC-400/I-IAC and I-IDC Technical Manual 3

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3 Configuration

Parameterization

The MFC-400/I-IAC and MFC-400/I-IDC feature 4 keys to access their functions. The

procedure to configure any parameter is as follows:

1. Press the P key 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 P to advance between letters. The default

password is AAAA.

3. Using the ↑ and ↓ keys, choose the desired parameter.

4. Press P to 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-400/I-IAC and MFC-400/I-IDC can be reset to factory settings. This procedure

also resets its password to AAAA. To do so, power up the device while pressing C.

Rev. A1 (20–05–09) MFC-400/I-IAC and I-IDC Technical Manual 4