Contemporary Control Systems MR-SI4 User Manual

Page 1

Digital Input Module MR-SI4

110 83913

1. Description

The Modbus module with 4 S0 inputs to DIN EN 62053 -31 class A was deve lope d for dec entral ized sw itchin g task s. It is suitable for countin g S0 counter pulses. This allows very good inte gration of the module into an energy cont rolling system. In case of a power failur e, the last counter r eadings are saved. The inputs c an be scanned by means of standard obje cts v ia a Modbus maste r. The module address, the baud rate and the parity are set by me ans of tw o address switches on t he front.

Suitab le for de centra lized mounting in serial sub-distributor.

2. Declaration of Conformity

The dev ice was te sted according to the applicab le standards. Conformit y was proofed. T he declaration of conformity is available at the manufacturer METZ CONNECT GmbH.

Notes Regarding Device Description

These instructio ns include indic ations for use and m ounting of the device. In case of questions tha t cannot b e answe red wi th these instructions please consult supplier or manufacturer.

The indi cated instal lation direc tions or r ules ar e applic able to the Federal Republic of Ge rmany. If the device is used in other countries it applies to the e quipme nt inst aller or the user to meet the national directions.

Safety Instructions

8096/899360

Keep th e applic able direct ions for industr ial safety and preve ntion of accide nts as we ll as the VDE rule s.

Technicians and/or installer s are informed that they have to elec tric ally dis charge t hemse lves as presc ribed before installation or mainten ance of the devices.

Only qualifie d pers onnel shall do mo unting an d installatio n work with the devices, se e sec tion “qualified pers onnel”.

The information of thes e instr uctions have to b e read and understood by ever y person usin g 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

Qualif ied pe rsonnel in the sense of these instructions are per sons who are well ver sed in the use and installation of such dev ices an d whose p rofes sional qualifi catio n meet s the re quirem ents of their work.

This includes for example:

• Qualif icati on to connect th e device according to the V DE speci fications and the loc al regulations and a qualificat ion to put this dev ice into operation, to pow er it dow n or to activate it by respecting the internal directions.

• Knowledge of safet y rule s.

• Knowledge about app lication and us e of the device within the equipm ent sy stem etc.

3. Technical Data

Modbus Interface

Protocoll Modbus R TU Transmission rate 1200 ... 115200 Bd (factory se tting 19200 Bd Even) Cabling RS485 two wire bus wi th volt age equalizing cable in bus / line topol ogy terminate with 120 Ohms

Supply

Operating voltage range 20 ... 28 V AC/ DC (SELV) Current consump tion 170 mA (AC) / 65 mA (DC) Relative dut y cycl e 100 %

Input

4x S0 input according to DIN EN 62053-31 Class A

Housing

Dimens ions Wx HxD 1.4 x 2.8 x 3.0 in. (35 x 70 x 65 mm) Weight 95 g Mounting position any Mounting standard rail T H35 per IEC 60715 Mounting in series the ma ximum quantit y of modul es with out s pace connected in line is limited to 15 or to a maximum power consumption of 2 Amps ( AC or DC) per conn ection to the pow er supply. For any similar block of additional modules a separate connection to the power supply is mandatory. Material Hous ing Polyamide 6.6 V0 Terminal blocks Polyamide 6.6 V0 Cover plate Polycarbonate Type of protecti on (IEC 60529) Housing IP4 0 Terminal blocks IP20

Terminal blocks

Supply and bus 4 pole terminal block max. AWG 16 (1.5 mm²) sol id wire max. AWG 18 (1.0 mm²) str anded w ire Wire diameter min . 0.3 mm up to ma x. 1.4 mm (terminal block and jumpe r plug are included to each packing unit) Module connection Inp ut /Output max. AWG 12 (4.0 mm²) s olid wire max. AWG 14 (2.5 mm²) stranded w ire Wire diameter min . 0.3 mm up to ma x 2.7 mm

Temperature range

Operation -5 °C ... +55 °C Storage -20 °C ... +70 °C Protective circuit ry polari ty revers al prote ctio n of operating voltage polarity re vers al prote ction of suppl y and bus

Display

Operating and bus acti vity gree n LED Error ind ication red LED Status of the input s yellow LED

4. Wiring Diagram

A1/ +24V

A2/ GND

BUS B+

BUS A-

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

24V

Modbus RTU

5. Connection Diagram

S04-

S04+

24 V AC/DC

+24V

GND

B+

BUS B+

A-

S01-

S01+

on RS-485

GND

BUS A-

S01+

S01 S02+

S02 S03+

RISC - CPU

S03 S04+

S04

S03-

S03+

+24V

GND

B+

A-

S02+

S02-

Page 2

6. Mounting

Power down the equipment.

Mount the module on standard rail ( TH35 pe r IEC 60715 in junction boxe s and/o r on distr ibution panels).

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

fied persons only, by re spec ting all applic able specifications and regulations.

Plug in the terminal block for bus connection.

Connect the cable for bus supply.

5 mm

Mounting in series.

The module can be aligne d witho ut inter space. Use the jumper plug to conne ct bus an d supply volta ge when t he modules are mounted in seri es.

The max imum qua ntity of modules connecte d in line is limited to 15 or to a maximum powe r consumption of 2 A mps (AC o r DC) pe r conne ction to the power suppl y. For any similar block of additional modules a separate connection to the power supply is mandatory.

7. Bit rate and Parity setting

The bit rate and parity c an be set in the pro gramming mode wh en ajumper is plugged behind the front cover of the module. This jumper is removed in normal mode. A c onnec tion to the bus is not required during bit rate setting.

The bit rate of the mo dules c an be se t in the following way:

1. r emove the front cover of th e module;

2. plug a jumper to the two middle pins of the 4 pole header betw een the red and green L ED (Á);

3. set th e desired pari ty and b it rate with the address s witches (Â ) in accordance to the chart b elow.

S03+

S03-

S04+

S04-

x10

BUSY

S02+

+24V

GND

B+

S02-

24V 24V

+24V

GND

B +

ERROR

Jumper below

the faceplate

A O

MR-SI4

MODBus RTU

S01+

S01-

4. switch on the supply voltage of t he module; it is now p erman ently savi ng the bit rate in an EEPROM;

5. switch off th e supply voltage of the mo dule;

6. remov e the jump er from t he head er and place the fr ont cove r.

Switch

1 2 3

x10

Parity even odd none

Switch

1 2 3 4 5 6 7 8

Bitrate

1200 2400 4800 9600 19200 38400 57600 115200

(Bit/s)

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

Factory setting: 19200 Bd Even

8. Software Description

8.1 I/O Commands

“02 (0x02) R ead Dis crete I nputs ”

Reque st

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 (0x 04) Read Input R egist ers”

Request

Valid Register Starting Address 20 Valid Quantity of Registers 1

Response

Byte Count 2 (Tabulator kontrollieren )

8.2 Modbus functions

The following f unctions are us ed to read or wri te the registers. The valid address r anges are indic ated in br acket 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 data ty pes with a length of several re giste rs, these re gisters are listed dire ctly o ne after the oth er and the one with the highest value are indicated fir st. This data c an only be transmi tted in complete form.

Discrete Inpu ts (Read-O nly)

Address

Name Description

0 – 3 INPUT

Input Register (Read-Only)

Address Name Description

0 – 11 IZ

12 – 19 BZ

20 INPUT Bits 0 -3 contain Discrete Input 0-3

Holding Register

Address Name Description

0 – 11 IT

12 – 19 AZ

20 – 23 IE

24 – 27 WI

Switchi ng stat us of the inputs (switches are connected),

0: Off (s witch is open), 1: On (switch is clos ed)

Pulse counter Data type uint48_t (3 registers ea ch)

Calculated counter reading Data type uint48_t (2 registers ea ch)

Copy of th e pulse counter af ter hav ing pre ssed the key Data type uint48_t (3 registers each) (EEPROM)

Initial count Data type uint 32_t (2 registers each) Factor y set ting 0 (EEPROM)

Pulse s per unit Data type uint16_t (1 re giste r each) Factor y set ting 1 (EEPROM)

Current conversion factor Data type uint16_t (1 re giste r each) Factor y set ting 1 (EEPROM)

(continued) Description of the software

28 – 31 WU

32 – 35 WP

36 – 39 ZS

40 – 43 TA

65 BAUD

8.3 Operating mode for calculation with conversion factor

In the WP register, there is a code 0…1 that determines, together with the conver sion fa ctor s WI and WU, the way how they are included in the c alculation. WP, WI and W U depend on whe ther the converters are switche d by the co unters, whet her the counter indicates the consumption in a primary or secon dary way and whe ther the emitted puls es correspo nd primarily or s econdarily to the consumption.

A diffe rence m ust be made bet ween the follo wing el ectricit y meter types:

Type 1: Directly measur ing coun ter, displ ay: prim ary, pulse: primar y

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

BZ = (---- -- --- - + AZ ) ∙ WI ∙ WU , BZ = counter rea ding = cons umption

Type 2: Conve rsion counter, display: p rimar y, 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

BZ = (---- -- --- - ∙ WI ∙ WU) + AZ , BZ = counter re ading = consumpti on

Type 3: Conve rsion counter, display: p rimar y, pulse: p rimar y

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

BZ = (---- -- --- - + AZ ) ∙ WI ∙ WU , BZ = counter rea ding = cons umption

Voltage conversion factor Data type uint16_t (1 re giste r each) Factor y set ting 1 (EEPROM)

Operating mode for calculation with conversion factor Data type uint16_t (1 re giste r each, on ly bit 0 valid) Range of v alues 0…1, see bel ow Factor y set ting 0 (EEPROM)

Format of the counter digit display Data type uint16_t (1 re giste r each) (EEP ROM) High by te for counter digi ts, Range of values 0…9, fac tory s etting 7, hi gher values are limited to 9 Low by te for pla ces af ter the decimal p oint, Range of values 0…3, factor y set ting 1, hi gher values are limited to 3

Flag for key activatio n Data type uint16_t (1 register each, f lag in bit 0 only) 0: key is locked, 1: key is operational factory setting 1 (EEPROM)

Codes f or baud rates and p arity Factor y set ting 19200 baud, Even Parity (EEPROM)

IZ – IT

Page 3

(continued) Description of the software

Type 4: Conversio n counte r, display: secon dary, pu lse: se condar y

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 Consumption and display of the conve rter counter are different . Both can be calculated using a dif ferent confi guration (WI, WU). Factor s: W I = WU = 1: The cal culate d counte r reading corre spond s to the display

of the conv erte r counte r. Factor s: W I and WU corresp ond to the conver ters: The cal culate d counte r reading corre spond s to the

consumption.

IZ – IT

BZ = (---- -- --- - + AZ ) ∙ WI ∙ WU , BZ = counter reading or consumption

8.4. Commissioning

The use r reads on site the initial count from the ele ctri city m eter and presses the key on the MR-SI4. Af ter this key press, the pulse counter of regis ter IZ is copied into register IT.

Afterwards, the user configures t he MR-SI4 v ia the Mo dbus usin g a service program. The following mus t be ente red:

• initial count read from the counter

• pulses per unit, e.g. indic ation on t he ele ctri city m eter 2000 puls es per k Wh

• formula type for calculation with converter factors

• factor for current conversion, e.g. indic ation on t he conve rter 200/5A → factor = 40

• factor for voltage conversion, e.g. indic ation on t he conve rter 20000 /100V → fac tor = 200

• number of digits and places after the de cimal po int

• deactivate the key to pr otect the IT re giste r

8.5.Details for calculation

The cal culate d counte r reading should behave e xac tly in the same way as the e lectricity meter. This requires that ther e should be no overflows and rounding off e rror s for the interme diate re sults . There fore, partic ularly large dat a typ es are us ed for co unting an d calculation.

Every 60 millisecon ds, a puls e can be emitte d by the electricit y mete r. This re sults in up to 1,440,0 00 puls es per day or abou t 526,000,000

pulse s per year. If the pulse counter was realized w ith 4 by tes, it c ould be count to

4,294,967,295. At highes t pulse f reque ncy, this would be e nough for approx . 8.2 years.

There fore it is realized with 6 b ytes and cann ot over flow. The numb er of places after the de cimal point is considered as an ad -

ditional multiplier with a powe r of ten dur ing the c alculation. Furth ermor e, it dete rmine s the place of the de cimal point in the display of BZ and A Z.

As for the elec tric ity co unter which only h as a specifie d number of decimal place s, the number of places is limited w ith the last step in the calculation. This is w hy the ca lculated counter reading of the MRSI4 over flows to 0 as of ten as the c ounter reading of the ele ctricity meter.

Calculated co unter reading, if WP is 0.

BZ = ( (uint96 _t) (IZ - IT)*WU*WI*Power of te n [place s after decimal point] / IE +

(uint96_t) A Z * WU * WI )

% power of ten [digits]

Calculated co unter reading, if WP is 1.

BZ = ( (uint96 _t) (IZ - IT)*WU*WI*Power of te n [place s after decimal point] / IE +

(uint96_t) A Z ) % power of ten [digits]

(continued) Description of the software

8.6 Bit rate setting with Modbus command

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

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

0x53 Parität Bitrate

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

The command will be further analysed only with this number.

Bit 7-4 1 2 3

Parität even odd none

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

Bitrate 1200 2400 4800 9600 19200 38400 57600 115200

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 dev ices c an be switched simultaneously wit h a Broadcast co mmand (Slave addre ss 0x00) Howe ver, it is advised not to do so as this can cause problems:

- 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 safe r to addre ss and s witch e ach dev ice indi vidually. The dev ice will then ans wer wi th the old sett ings of parity and bit

rate. Switching will take place only afterwards. Howe ver, the ans wer can get l ost if th e bus is dis turbe d.

When all devices are switche d; it is adv ised to check communic ation. Any func tion of the device prov iding a fe edback is suit able. If a single funct ion is to be u sed be ing inde pendent from t he process pe riphery then the funct ion „Diagnost ic“ sub -func tion „R eturn Q uery Data“ is suitab le, it returns the transf erre d data.

If bit rate and pari ty se tting of a devic e are unkn own it is p ossible to address the device successively w ith all combinations of bit rate and parit y until the device answe rs. Try t he most l ikely combinations fir st. Try the low er bit rates last as they t ake longer.

(continued) Description of the software

8.7 General Commands

“08 (0x08) Diagnostics”

Subfunc tion “0 ( 0 x00 00) 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

Subfunc tion “4 (0x 0004) Force L isten Only Mode”

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

Subcode 01

Subfunc tion “10 ( 0x 000A ) Clear Counters”

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

Subfunc tion “11 ( 0x000B) Re turn Bus M essage 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.

Subfunc tion “12 ( 0x0 00C ) Retur n Bus Communication Erro r 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)

Subfunc tion “13 ( 0x0 00D) Return Bus Exception 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.

Subfunc tion “14 (0x 000E) Retur n Slave Me ssage Count ”

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.

Subfunc tion “15 (0x000F ) Return Slave No Respo nse 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.

(continued) Description of the software

“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”