Metz Connect MR-SI4, MR-DI10 User Manual

1. Description

The Modbu s module with 4 S0 inpu ts to DIN EN 62053-31 class A was devel oped for decentr alized switchin g tasks. It is suit able for counting S0 c ounter pulses. T his allows very g ood integration of t he module into a n energy controll ing system. In ca se of a power failure, the last co unter readings are s aved. The inputs c an be scanned by means of st andard object s via a Modbus maste r. The module address , the baud rate and the p arity are set by me ans of two address s witches on the fr ont.

Suitable f or decentralize d mounting in seria l sub-distribu tor.

2. Declaration of Conformity

The devi ce was tested accor ding to the applicab le standards. Co nformit y was proofed. The de claration of confo rmity is availabl e at the manufacturer METZ CONNECT GmbH.

Notes Regarding Device Description

These in structions inc lude indications f or use and mounting of th e device. In c ase of questions t hat cannot be answe red with these instructions please consult supplier or manufacturer.

The indic ated installati on directions or r ules are applica ble to the Federa l Republic of Germa ny. If the device is use d in other countrie s it applie s to the equipment ins taller or the use r to meet the national directions.

Safety Instructions

Keep the ap plicable direc tions for industr ial safety and pr evention of accident s as well as the VDE rul es.

Technician s and/or installe rs are informed th at they have to elect rically dischar ge themselves a s prescribed be fore installati on or maintenan ce of the devices.

Only quali fied personn el shall do mounting an d installation wo rk with the de vices, see se ction “qualifie d personnel”.

The inform ation of these ins tructions have to b e read and understood by e very person us ing this device.

Symbols

Warning of dangerous electrical voltage

Danger

means that non-observance may cause risk of life, grievous bodily harm or heavy material damage.

Qualified Personnel

Qualifi ed personnel in t he sense of these i nstructions ar e persons who are wel l versed in the use a nd installation of s uch devices and whose pro fessional quali fication meet s the requireme nts of their work.

This includes for example:

• Qualifi cation to co nnect the device a ccording to the VDE specif ications and the loc al regulations and a qu alification to put this devi ce into operation, to po wer it down or to activ ate it by respecting the internal directions.

• Knowle dge of safety rule s.

• Knowle dge about applicat ion and use of the devic e within the equipme nt system etc.

3. Technical Data

Modbus Interface

Protocol l Modbus RT U Transmissio n rate 1200 ... 115200 Bd (factor y setting 19200 Bd Even) Cabling RS485 t wo wire bus with volt age equalizin g cable in bus / line topo logy terminate with 120 Ohms

Supply

Operati ng voltag e range 20 ... 28 V AC/D C (SELV) Current co nsumption 170 mA (AC) / 65 mA (DC ) Relativ e duty cycle 100 %

Input

4x S0 input acc ording to DIN EN 62053-31 Cla ss A

Housing

Dimensio ns WxHxD 1.4 x 2.8 x 3.0 in. (35 x 70 x 65 mm) Weight 95 g Mounting position any Mounting standar d rail TH35 per IEC 60715 Mounting in s eries the max imum quantity of modu les witho ut space connec ted in line is limited to 15 or to a maxim um power consumptio n of 2 Amps (A C or DC) per connec tion to the powe r supply. For any similar block of a dditional module s a separate connection to the power supply is ma ndatory. Material Housing Po lyamide 6. 6 V0 Terminal blocks Polyamide 6.6 V0 Cover plate Polycarbonate Type of prote ction (IEC 60529) Housing IP40 Terminal blocks IP20

Terminal blocks

Supply and b us 4 pole terminal bloc k max. AWG 16 (1.5 mm²) solid w ire max. AWG 18 (1.0 mm²) stran ded wire Wire diame ter min. 0.3 mm up to ma x. 1.4 mm (terminal b lock and jumper plug ar e include d to each pack ing unit) Module connection Input/Ou tput max. AWG 12 (4.0 mm²) so lid wire max. AWG 14 (2.5 mm ²) stranded wire Wire diame ter min. 0.3 mm up to ma x 2.7 mm

Temperature range

Operati on -5 °C ... +55 °C Storage -20 °C ... +70 °C Protec tive circuitry polarit y reversal prote ction of operating voltage polarit y reversal prot ection o f supply and bus

Display

Operati ng and bus activit y green LED Error indic ation red LED Status of the i nputs yellow L ED

5. Connection Diagram

24 V AC/DC

GND

BUS B+

BUS A-

GND

B+

A-

+24V

B+

A-

S04-

+24V

GND

S04+

S03-

S03+

S01+

S01-

S02+

S02-

4. Wiring Diagram

A1/ +24V

A2/ GND

BUS B+

BUS A-

24V

RISC - CPU

24V AC / 170mA 24V DC / 65mA

S01+

S01

S04+

S04

S02+

S02 S03+

S03

Modbus RTU

on RS-485

Digital Input Module MR-SI4

110 8 3 913

8096/899360

6. Mounting

Power down th e equipm ent.

Mount the mo dule on standard ra il (TH35 per IEC 60715 in junctio n boxes and/or on dis tribution pane ls).

Installation Electric installation and device termination shall be done by quali-

fied per sons only, by respe cting all applic able specifications and regulations.

Plug in the terminal block for bus connection.

5 mm

The modul e can be aligned wit hout interspac e. Use the jumper plug to connec t bus and supply volt age when the modul es are mounted in serie s.

The maxi mum quantity of mod ules connected i n line is limited to 15 or to a maximu m power consumptio n of 2 Amps (AC or DC) per co nnection to the po wer supply. For any sim ilar block of additional modules a separate connection to the power supply is mandatory.

Connec t the cable f or bus supp ly.

Mounting in series.

7. Bit rate and Parity setting

The bit rate a nd parity can be s et in the programmin g mode when ajumper is p lugged behind th e front cover of the mod ule. This jumper is re moved in normal mo de. A connection to t he bus is not required during bit rate setting.

The bit rate o f the modules can be s et in the followin g way:

1. re move the fro nt cover of the module;

2. plug a jumpe r to the two middle pin s of the 4 pole header betwe en the red and green L ED (Á);

3. set the de sired parity an d bit rate with the addre ss switches (Â ) in accordan ce to the chart below.

If the settings differ from the settings specified in the chart the factory setting applies.

Factory setting: 19200 Bd Even

Switch

1 2 3 4 5 6 7 8

Bitrate

(Bit/s)

1200 2400 4800 9600 19200 38400 57600 115200

Switch

x10

1 2 3

Parity even odd none

4. switch o n the supply voltage o f the module; it is now per manent-

ly saving t he bit rate in an EEPROM;

5. switch o ff the supp ly voltage of the mod ule;

6. remove th e jumper from the hea der and place the front c over.

S02+

S02-

S03+ S03-

S04+

S01+

24V 24V

ERROR

1 A O

B +

MR-SI4

B+

+24V

GND

+24V

GND

BUSY

MODBus RTU

x10

Jumper below the faceplate

S04-

S01-

8. Software Description

8.1 I/O Commands

“02 (0x02) Re ad Discrete Input s”

Reques t

Valid Input Starting Address 0 .. 3 Valid Quantity of Inputs 1 .. 4

Response

Byte Count 1 Input Status Bit0 .. Bit3 ( Bit4 .. Bit7 = 0 )

Information

1 = Status Input closed 0 = Status Input open

“04 (0x0 4) Read Input Regis ters”

Request

Valid Register Starting Address 20 Valid Quantity of Registers 1

Response

Byte Count 2 (Tabulator kontrollieren )

8.2 Modbus functions

The follo wing functions ar e used to read or wri te the register s. The valid addr ess ranges are ind icated in bracket s.

Read Input Registers (0-20) Read Holding Registers (0-43) Write Single Register (20-43) Write Single Register (65) Write Multiple Registers (0-43)

For long dat a types with a le ngth of several re gisters, the se registers are liste d directly one af ter the other and th e one with the highes t value are in dicated first . This data can only b e transmitted in co mplete form.

Discret e Inputs (Read- Only)

Address

Name Description

0 – 3 INPUT

Switching s tatus of the input s (switches are connected),

0: Off (sw itch is open), 1: On (switch is c losed)

Input Register (Read-Only)

Address Name Description

0 – 11 IZ

Pulse counter Data typ e uint48_t (3 regi sters each)

12 – 19 BZ

Calculated counter reading Data typ e uint48_t (2 regi sters each)

20 INPUT Bits 0-3 c ontain Discret e Input 0-3

Holding Register

Address Name Description

0 – 11 IT

Copy of the pu lse counter afte r having presse d the key Data typ e uint48_t (3 regis ters each) (EEPRO M)

12 – 19 AZ

Initial count Data typ e uint32_t (2 regist ers each) Factor y setting 0 (EEPROM )

20 – 23 IE

Pulses p er unit Data typ e uint16_t (1 register eac h) Factor y setting 1 (EEPROM )

24 – 27 WI

Current conversion factor Data typ e uint16_t (1 register eac h) Factor y setting 1 (EEPROM )

(continued) Descripti on of the sof tware

28 – 31 WU

Voltage conversion factor Data typ e uint16_t (1 register eac h) Factor y setting 1 (EEPROM )

32 – 35 WP

Operating mode for calculation with conversion factor Data ty pe uint16_t (1 register eac h, only bit 0 valid) Range of val ues 0…1, see below Factor y setting 0 (EEPROM )

36 – 39 ZS

Format of th e counter digit displ ay Data typ e uint16_t (1 register eac h) (EEPROM) High byte f or counter digits , Range o f values 0…9, factory s etting 7, highe r values are limite d to 9 Low byte f or places after t he decimal point, Range o f values 0…3, factor y setting 1, highe r values are limite d to 3

40 – 43 TA

Flag for key a ctivation Data typ e uint16_t (1 register e ach, flag in bit 0 only ) 0: key is locke d, 1: key is operati onal factor y setting 1 (EEPRO M)

65 BAUD

Codes for b aud rates and parit y Factor y setting 19200 baud, Eve n Parity (EEPROM)

8.3 Oper ating mod e for calcu lation wit h convers ion factor

In the WP re gister, there is a code 0…1 that de termines, toge ther with the co nversion facto rs WI and WU, the way how t hey are include d in the calculation . WP, WI and WU dep end on whether the conver ters are switc hed by the counter s, whether the cou nter indicate s the consumption in a p rimary or secon dary way and whe ther the em itted pulses co rrespond prima rily or secondar ily to the consumption.

A differ ence must be made be tween the follo wing electri city meter types:

Type 1: Direc tly measuring cou nter, display: prima ry, pulse: primary

Note: Indicates the actual consumption Species: DIN rail counter with mechanical drum-type counting

mechanism, Ferraris counter Type of formula: WP = 0 Factors: WI = WU = 1

IZ – IT

BZ = (------- --- + A Z) ∙ WI ∙ WU , BZ = counter re ading = cons umption

Type 2: Conver sion counter, display : primary, pulse: s econdary

Note: Indicates the actual consumption Species: Counter with LCD display Type of formula: WP = 1 Factors: WI and WU correspond to the converters

IZ – IT

BZ = (------- --- ∙ W I ∙ WU) + AZ , BZ = counter re ading = consu mption

Type 3: Conver sion counter, display : primary, pulse: p rimary

Note: Indicates the actual consumption Species: Counter with LCD display, multi-function meters Type of formula: WP = 0 Factors: WI = WU = 1

IZ – IT

BZ = (------- --- + A Z) ∙ WI ∙ WU , BZ = counter re ading = cons umption

(continued) Descripti on of the sof tware

Type 4: Conver sion counter, displa y: secondary, pul se: secondary

Note: Indicates the consumption reduced by the converter factors Species: DIN rail counter with mechanical

drum-type counting mechanism, Ferraris counter

Type of formula: WP = 0 Consumpt ion and display of the co nverter counter a re different. Both can be c alculated using a di fferent confi guration (WI, WU ). Factors : WI = WU = 1: The calcu lated counter rea ding correspond s to the display

of the conve rter counter. Factors : WI and WU corre spond to the conver ters: The calcu lated counter rea ding correspond s to the

consumption.

IZ – IT

BZ = (------- --- + A Z) ∙ WI ∙ WU , BZ = counter readi ng or consumptio n

8.4. Commissioning

The user r eads on site the initi al count from the ele ctricity me ter and presse s the key on the MR-SI4. A fter this key pre ss, the pulse counte r of regist er IZ is copied into re gister IT.

After wards, the user con figures the MR-SI4 v ia the Modbus using a servi ce program. The fol lowing must be ente red:

• initial count read from the counter

• pulses p er unit, e.g. indicat ion on the electr icity meter 2000 p ulses per kWh

• formula t ype for calculatio n with converter fa ctors

• factor for current conversion, e.g. indicat ion on the converte r 200/5A → factor = 40

• factor for voltage conversion, e.g. indicat ion on the converte r 20000/100V → facto r = 200

• number of dig its and places aft er the decimal point

• deacti vate the key to protec t the IT register

8.5.Details for calculation

The calcu lated counter rea ding should behave e xactly in the s ame way as the ele ctricity me ter. This requires t hat there should be n o overf lows and rounding of f errors for the in termediate resu lts. Theref ore, particular ly large data typ es are used for coun ting and calculation.

Every 6 0 milliseconds, a pu lse can be emitte d by the electr icity meter. This resu lts in up to 1,440,000 p ulses per day or abou t 526,000,000

pulses p er year. If the puls e counter was realize d with 4 bytes, it c ould be count to

4,294,967,295. At hig hest pulse freq uency, this would be e nough for approx. 8. 2 years.

Theref ore it is realized wi th 6 bytes and cann ot overflow. The numbe r of places after th e decimal point is con sidered as an ad-

ditional m ultiplier with a po wer of ten during the c alculation. Furthe rmore, it determi nes the place of the de cimal point in the display of BZ a nd AZ.

As for the e lectricit y counter which only h as a specified nu mber of decimal p laces, the number of p laces is limited w ith the last step in the calcu lation. This is why th e calculated count er reading of the MRSI4 over flows to 0 as often as t he counter reading o f the electric ity met er.

Calcula ted counter readi ng, if WP is 0.

BZ = ( (uint96_t ) (IZ - IT)*WU*W I*Power of ten [plac es after decima l point] / IE +

(uint96_t) A Z * WU * WI )

% power of ten [di gits]

Calcula ted counter readi ng, if WP is 1.

BZ = ( (uint96_t ) (IZ - IT)*WU*W I*Power of ten [plac es after decima l point] / IE +

(uint96_t) A Z ) % power of ten [di gits]

(continued) Descripti on of the sof tware

8.6 Bit rate se tting wi th Modbus c ommand

Parity and bit rate have the same value as when setting them by address switch.

If Parity or Bit has the value 0, no setting or storage is carried out. The register content is stored in the EEPROM.

“06 (0x06) Write Single Register”

Request

Valid Register Address 0x41 ( 65 ) Valid Register Value 2 Bytes

Bit 15-8: Magic-Number 0x53 = 83 as protection against accidental writing.

The command will be further analysed only with this number.

Response

Echo of Request

Example for a frame:

Slave address 0x12 Setting of rotary switch (18) Function 0x06 Write Single Register Register address Hi 0x00 Register address Lo 0x41 Bit rate and parity (65) Register contents Hi 0x53 Magic-Number Register contents Lo 0x15 Parity Even, 19200 Baud

All devi ces can be switch ed simultaneou sly with a Broadc ast command (Slave a ddress 0x00) Ho wever, it is advise d not to do so as this can cause p roblems:

- Devices from other manufacturers may have under this address a register for a different purpose that will then be operated in the wrong way.

- There is no feedback from the individual devices. Consequently the control cannot immediately recognize

if the command was correctly received. It is safer to a ddress and swit ch each device indi vidually. The devi ce will then answe r with the old sett ings of parity and b it

rate. Switch ing will take place o nly afterwar ds. However, the answ er can get los t if the bus is disturb ed.

When all de vices are switc hed; it is advised t o check communicat ion. Any func tion of the device pr oviding a feedba ck is suitable. If a sin gle functi on is to be used being in dependent from t he process per iphery then the fu nction „Diagno stic“ sub-func tion „Return Que ry Data“ is suitabl e, it returns the tran sferred data.

If bit rate an d parity sett ing of a device are unkn own it is possible t o address t he device succes sively with all c ombinations of bit rat e and parity u ntil the device ans wers. Try the most l ikely combinatio ns first. Try the lowe r bit rates last as the y take longer.

(continued) Descripti on of the sof tware

8.7 General Commands

“08 (0x08) Diagnostics”

Subfunct ion “0 ( 0x0000) Re turn Query Data”

Data Field Any Response: Echo of Request

Subfunction “1 (0x0001) Restart Communication Option”

Data Field 0x0000 oder 0xFF00 Response: Echo of Request Action: Clears all Error Counters, Restarts node

Subfunct ion “4 (0x0004) Force L isten Only Mode”

Data Field 0x0000 No Response Action: No response until Node Reset or Function Code 08

Subcode 01

Subfunct ion “10 ( 0x000A) Clea r Counters”

Data Field 0x0000 Response: Echo of Request Action: Clears all Error Counters

Subfunct ion “11 ( 0x000B ) Return Bus Messa ge Count”

Data Field 0x0000 Response: Quantity of messages that the remote device has

detected on the communications system since its last restart, clear counters operation, or power-up.

Subfunct ion “12 ( 0x000C) Ret urn Bus Communicati on Error Count”

Data Field 0x0000 Response: Quantity of errors encountered by the remote

device since its last restart, clear counters operation, or power-up. (CRC, Length <3, Parity, Framing)

Subfunct ion “13 ( 0x000 D) Return Bus Excep tion Error Count”

Data Field 0x0000 Response: Quantity of MODBUS exception responses returned

by the remote device since its last restart, clear counters operation, or power-up.

Subfunct ion “14 (0x000E) Retu rn Slave Message Co unt”

Data Field 0x0000 Response: quantity of messages addressed to the remote

device, or broadcast, that the remote device has processed since its last restart, clear counters operation, or power-up.

Subfunct ion “15 (0x00 0F) Return Slave No R esponse Count”

Data Field 0x0000 Response: Quantity of messages addressed to the remote

device for which it has returned no response (neither a normal response nor an exception response), since its last restart, clear counters operation, or power-up.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0x53 Parität Bitrate

Bit 3-0 1 2 3 4 5 6 7 8

Bitrate 1200 2400 4800 9600 19200 38400 57600 115200

Bit 7-4 1 2 3

Parität even odd none

(continued) Descripti on of the sof tware

“43 /14 (0x2B / 0x0E) Read Device Identification”

Request

Read Device ID code: 0x01 Object ID 0x00

Response

Device ID code 0x01 Conformity level 0x01 More follows 0x00 Next object ID 0x00 Number of objects 0x03 Object ID 0x00 Object Length 0x03 Object Value “BTR” Object ID 0x01 Object Length 0x06 Object Value “MR-SI4” Object ID 0x02 Object Length 0x04 Object Value “V2.0”

Metz Connect MR-SI4, MR-DI10 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual