ero electronic RFS User Manual

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TITLE: RFS – User Manual 170.IU0.RFS.101

USER MANUAL RFS

DIN Rail Mounting Temperature Controller

ERO Electronic, division of Eurotherm s.r.l. Via Enrico Mattei 21 I-28100 Novara ITALY

Tel. +39-0321-481111 Fax. +39-0321-481112

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TITLE: RFS – User Manual 170.IU0.RFS.101

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Index

MOUNTING REQUIREMENTS...................................................................................................... 4

OUTLINE DIMENSIONS................................................................................................................ 4

CONNECTION DIAGRAMS ........................................................................................................... 4

ACCESSORIES.............................................................................................................................. 8

FUNCTIONALITY......................................................................................................................... 11

SPECIAL FUNCTIONS DURING OPERATIVE MODE................................................................ 11

GENERAL NOTES ON THE MODBUS RTU PROTOCOL.......................................................... 13

TRANSMISSION FORMAT.......................................................................................................... 15

COMMUNICATION PROCEDURE............................................................................................... 15

FUNCTION CODE 1 AND 2: BITS READING.............................................................................. 18

FUNCTION CODE 3 AND 4: WORDS READING........................................................................ 19

FUNCTION CODE 5: SINGLE BIT WRITING............................................................................... 20

FUNCTION CODE 6: SINGLE WORD WRITING......................................................................... 21

FUNCTION CODE 8: DIAGNOSTIC............................................................................................. 22

FUNCTION CODE 15: MULTIPLE BITS WRITING...................................................................... 23

FUNCTION CODE 16: MULTIPLE WORDS WRITING................................................................ 24

NOTES......................................................................................................................................... 24

ERROR REPLY............................................................................................................................ 27

DEVICE IDENTIFICATION GROUP (117)................................................................................... 28

OPERATIVE GROUP (900)..........................................................................................................29

DEVICE MANAGEMENT GROUP (1000).................................................................................... 31

PROCESS VARIABLE INPUT GROUP (1100)............................................................................ 32

CURRENT TRANSFORMER INPUT AND ALARM GROUP (1200)............................................ 34

DIGITAL INPUT GROUP (1300)................................................................................................... 36

SETPOINT GROUP (1400).......................................................................................................... 37

CONTROL (OUTPUT 1) GROUP (1500) ..................................................................................... 40

SMART GROUP (1600)................................................................................................................43

ALARM 1 (OUTPUT 2) GROUP (1700)........................................................................................ 44

ALARM 2 (OUTPUT 3) GROUP (1800)........................................................................................ 46

ALARM 3 (OUTPUT 4) GROUP (1900)........................................................................................ 48

DIGITAL OUTPUTS GROUP (2000)............................................................................................ 50

COMMUNICATION GROUP (2100)............................................................................................. 51

GENERAL SPECIFICATIONS...................................................................................................... 49

MAINTENANCE ........................................................................................................................... 51

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117

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MOUNTING REQUIREMENTS

Select a mounting location having the f ollowing characteristics:

1) it should be easy accessible

2) there is no vibrat ions or impact

3) there are no corrosive gases ( sulphuric gas, ammonia, etc.).

4) there are no water or other fluid (i. e. condense)

5) the ambient temper at ur e is in accordance with the operative t em per ature of the instrument (from 0 to 50 °C).

6) the relative humidi t y is i n accor dance with t he instrument specif i c at i ons ( 20% t o 85 % non condensing).

The instrument can be m ount ed on OMEGA DIN rail in accordance with EN 50 022 (35 x 7.5 mm or 35 x 15 mm) regulations. For outline dimensions refer t o Fig. 2.

MOUNTING

Fig. 1.B

OUTLINE DIMENSIONS

8.5

Fig. 2 OUTLINE DIMENSIO NS

CONNECTIO N DIAGRAMS

Fig. 1.A REMOVING

12345

8 9

23 22 21 20

Fig. 3 TERMINAL BLOCK

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RTD2122

Shield_+

mV22+_mV

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2) Pay attention to the line resistance; a high line resistance (higher than 20 Ω/wire) may cause measurement errors.

3) If shielded cable is used, it should be grounded at one point only.

MEASURING INPUTS NOTE: Any external component (like zener

barriers etc.) connect ed between sensor and input terminals may cause errors in measurement due to excessive and/or not balanced line resistance or possible leakage currents.

TC INPUT

4) The resistance of the 3 wires must be the same.

LINEAR INPUT

Shield

Fig. 4 THERMOCOUPLE INPUT WIRING NOTE:

1) Don’t run input wires together with power cables.

2) For TC wiring use proper compensating cable preferable shielded.

3) When a shi elded cable is used, it should be connected at one point only.

RTD INPUT

Fig. 6.A mA INPUT WIRING

Shield

RTD

2122

Fig. 5 RTD INPUT WIRING NOTE:

1) Don’t run input wires together with power cables.

Fig. 6.B 60mV INPUT WIRING NOTE:

1) Don’t r un input wires together with power cables.

2) When shi elded cable is used, it should be grounded at one side only to avoid ground loop currents.

3) For mV input, pay attention to the line resistance; a high line resistance m ay cause measurement errors.

4) The input impedance is equal to:

< 5 Ω for 20 mA input. > 1 MΩ for 60 mV input.

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LOGIC INPUT

Safety note:

1) Do not r un logic input wiring together with power cables.

2) Use an external dry contact capable of switching 5 mA, 7.5 V DC.

3) The instrument needs 100 m s to recognize a contact status variation.

4) The logic inputs is isolated by the measuring input.

RELAY OUTPUTS

OUT 1

OUT 2

OUT 3

19 15

16 11 12

Fig. 7 - LOGIC INPUT WIRING This logic input can be program m ed i n or der to

perform the following functions: a) to switch from main set point to auxiliary set point and viceversa.

logic input op. set point

open main SP

close auxiliary SP (SP2)

b) to hold the set point ramp execution.

logic input Ramp

open RUN close HOLD

CURRENT TRANSFORMER INPUT

Current

transformer

Fig. 9 RELAY OUTPUTS WIRING The contact rati ng of t he O UT 1, 2 and 3 is

3A/250V AC on resistiv e load. The number of operati ons is 3 x 105 at specified

rating.

NOTES

1) To avoid electrical shock, connect power line at the end of the wiring procedur e.

2) For power connections use No 16 AWG or larger wires rated for at last 75 °C.

3) Use copper conductors only.

4) Don’t r un input wires together with power cables.

All relay contacts are protected by vari stor against inductive load with inductive component up to 0.5 A.

The following recommendations avoid seri ous problems which may occur, when using relay output for driving inductiv e loads.

Load

Fig. 8 CURRENT TRANSFORMER INPUT

WIRING

Note:

1) The input impedance is equal to 12 Ω.

2) The maximum input cur r ent is equal to 50 mA rms (50 / 60 Hz).

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A/A’

B/B’

Common

C/C’

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INDUCTIVE LOADS

High voltage transients may occur switching inductive loads. Through the internal contacts t hese transients may introduce disturbances which can affect the performance of the instrument. For all the outputs, the internal protection (varistor) assures a correct protection up t o 0. 5 A of inductiv e com ponent .

The same problem may occur when a switch is used in series with the inter nal contacts as shown in Fig. 10.

C R line

load

power

Fig. 10 EXTERNAL SWITCH IN SERIES WITH THE INTERNAL CONTACT

In this case it is recomm ended t o install an additional RC network across the external contact as show in Fig. 10 The value of capacitor (C) and r esi stor (R) are shown in the following table.

LOAD

(mA)

<40 mA <150 mA <0.5 A

(µF)

0.047

0.1

0.33

(Ω)

100

OPERATING

(W)

VOLTAGE

1/2 22 47

260 V AC

The cable involved in relay output wiring must be as far away as possible from input or communication cables.

VOLTAGE OUTPUTS FOR SSR DRIVE

OUT 1

OUT 2

SOLID STATE

RELAY

SOLID ST ATE

RELAY

Fig. 11 SSR DRIVE OUTPUT WIRING

Maximum current = 20 mA. NOTE: This output is not is olated. A double or reinforced isolation between instr um ent output and power supply must be assured by the external solid state relay.

SERIAL INTERFACE

RS-485 interface allows you to connect slave

devices with one remote master unit.

Fig. 12 - RS-485 WIRING NOTES:

1) The RFS is equipped with an RS-485 driv er

with an input impedance fore t ime higher than a standard one. For this r eason i t is possible to connect 120 RFS units to the same m aster (instead of 30).

1) The cable length must not exceed 1.5 km at

19200 BAUD.

2) This serial interf ace i s isolated.

3) The following report describes the signal

sense of the voltage appearing across the interconnection cable as defined by EIA for RS-485. a) The ” A ” terminal of the generator shall

be negative with respect to the ” B ” terminal for a binary 1 (MARK or OFF) state.

b) The ” A ” terminal of the generator shall

be positive with respect to the ” B ” terminal for a binar y 0 (SPACE or O N) .

4) The EIA standard establishes that by RS-485

interface it i s possible to connect up to 30 devices with one remote master unit. The serial interface of t hese i nst r um ents is based on “High input impedance” transceivers; t hi s solution allows you to connect up to 120 devices (based on t he same transceiver t ype) with one rem ot e master unit.

It is a time proportioning output.

Logic level 0: Vout < 0.5 V DC. Logic level 1:

- 14 V + 20 % @ 20 mA

- 24 V + 20 % @ 1 mA.

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POWER LINE WIRING

POWER LINE 24 V A.C/DC

Fig. 13 POWER LINE WIRING NOTES:

1) Before connecting the inst r um ent to the power line, make sure that line voltage corresponds to the descripti on on the identificat ion label.

2) Use copper conductors only.

3) Don’t run input wires together with power cables.

4) The power supply input is NOT fuse protected. Please, provide it exter nally. For one unit only, the fuse must be rated as follows:

Power supply Type Current Voltage

24 V AC/DC T 315mA 250 V When f use i s dam aged, it is advisable to verify the power supply circuit, so that it is necessary to send back the instrument to your supplier.

5) The maximum power consumpti on i s equal to 6 VA (4 W) maximum.

ACCESSORIES

BUS cable

It is possible to use a screw connector instead of the flat cable, allowing the normal wiring of a single controller. This flat cable allows the simultaneous connection of the power supply, the serial interface, the com m on alarm output (out 4) and the common logic input of up to 12 i nst r um ent s plus one Common I/O unit or up to 13 instruments. NOTE:

1) the logic inputs of each instrum ent can be driven:

by its own connector (terminals 6 and 7),

without affecting the working of t he other elements

by the common logic input (termi nals 24 and

25) present on the common I/O unit. In this case, all instruments connected with the BUS cable will detect the same logic input condition.

2) The local logic input (terminals 6 and 7), and the common logic input (term inals 24 and

25), are in OR condition.

BUS

Fig. 14 – BUS CABLE The connector used is a MO LEX Eur ope with

16 circuits Part num ber 39512163

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Fig. 15 – CONNECTOR 8 x 2 FOR BUS CABLE

COMMON I/O UNIT

This unit can perf or m 3 different functi ons:

1) It is the relay output of all the common alarm connected by the BUS cable.

2) It performs the connecti on of the common logic input of all the units connected by the BUS cable.

3) It is the natural connection of the power supply and of the serial link for all the units connected by the BUS cable.

D.IN

Fig. 18/A Common logic input OPEN

D.IN

RFS

D.IN

RFS

D.IN

RFS

D.IN

RFS

COMMON I/O UNIT

Fig. 16 - COMMON I/O UNIT TERMINAL BLOCK

For serial interface and power supply connection see fig. 12 and 13 and relative not es.

RFS

Fig. 18/B Common logic input CLOSE NOTE: As shown in Fig 18, t he logic input of a

group of RFS can be driven singularly (using terminals 6 and 7 of the specifi c i nstrument) or collectively (using terminals 24 and 25 of the Common I/O unit).

This logic input can be program m ed i n or der to perform the following functions: a) to switch from main set point to auxiliary set

point and viceversa.

logic input selected set point

open main SP close auxiliary SP (SP2)

b) to hold, the set point ramp execution.

logic input Ramp

open RUN close HOLD

Common logic input

Safety note:

1) Do not r un logic input wiring together with

power cables.

2) Use an external dry contact capable of

switching 100 mA, 7.5 V DC minim um .

3) The instrument needs 100 m s to recognize a

contact status variation.

4) The logic input is isolated by the measuri ng

input.

Fig. 17 – CO M MON LOGIC INPUT WIRING

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Common alarm output

26 27

Fig. 19 COMMON ALARM OUTPUT WIRING

OFF

.C.

COM

.O.

Out 4

From bus connector

RFS

RFS RFSRFS

V+

COMMON I/O UNIT

Fig. 20/A Relay de-energized, beacon ON lit.

ONOFF

Out 4

From bus connector

RFS

RFS RFSRFS

V+

COMMON I/O UNIT

.C.

COM

.O.

Fig 21 – 2 wires connector Phoenix model MSTB 2.5/2-ST- 5.08

Fig. 22 - 3 wires connector Phoenix model MSTB 2.5/3-ST- 5.08

Fig. 23 - 4 wires connector NOTE: this connect or i s a gold plated connector

and it is shipped with the i nst r um ent and it is not included in the connector ki t.

Phoenix model MSTB 2.5/4-ST- 5.08 Fig. 20/B Relay energized, beacon OFF lit. The contact rati ng of this output is 8A/250V AC

on resistive load. The number of operati ons is 3 x 105 at specified

rating.

NOTE

Don’t run input wires together with power cables. The relay contacts are protected by varistor against inductive load with inductive component up to 0.5 A.

CONNECTOR KI T

The unit can be supplied with or without the connector kit. The quantity of each connector i s r elated with the specific options selected.

Fig. 24 - 5 wires connector

Phoenix model MSTB 2.5/5-ST- 5.08

Fig. 25 - 8 wires connector

Phoenix model MSTB 2.5/8-ST- 5.08

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FUNCTIONALITY

Operating modes descri pt i on The device for esees t hr ee different operati ng

modes named:

- Calibration mode

- Configuration mode

- Operativ e m ode

The calibrati on m ode

This operating m ode is detailed in a specific manual named “RFS Calibration manual”.

The configurati on m ode

During configurati on m ode t he instrument does not perform the process cont r ol and the alarms functions.

During configurati on i t is possible to read and write all the parameters of the instrument . The instrument configuration can be made by RS-485 or by a specific tool named CPI. NOTE the standar d RS-485 and t he CPI are mutually exclusive and the CPI have the pri or ity with respect of the RS-485. The CPI is shipped with a special software aimed to made the configurat i on procedure very easy. The CPI and the RFS configuration pr ogr am ar e described in a specific m anual. In the chapter “RFS Modbus protocol” you will find all the information related with the various parameters (when it can be write or r ead, limi t s , and so on).

Indicators

1 Lit when OUT 1 is ON.

2 Lit when OUT 2 is ON.

3 Lit when OUT 3 is ON.

4 Lit when OUT 4 is ON.

PV FAIL Lit when a fai lure is det ected on the

measuring input. COM Lit during tr ansm ission. SYS Flashing during operative mode

Lit during configur ation and calibration

mode. D.IN lit when the logic input is closed

Enable/disable the control output

When t he i nstrument is in operat ive mode, it i s possible to disable the control outputs [1504]. In this open loop mode the device will function as an indicator, the i nstrument will perform the measure but all control outputs will be forced to

0. When t he cont r ol outputs ar e di sabled the alarms are also in no alarm condition. If a power down occurs when the control output is disabled, at instrument power up the cont r ol output will be automatically disabled. When t he cont r ol is rest or ed t he instrument operates as in presence of a power up and the alarm mask function, if conf igured, will be activated.

The operative mode

During operative mode the instrument performs the process control and the alarms management and all the other special functions (SMART, soft start, etc.).

During Operative mode it is possible to read and write a subset of parameters.

SPECIAL FUNCTIONS DURING OPERATIVE MODE

Follows a list of the special functions perform by this instrument . It aims to help you during configuration and operat ive mode in order t o obtain the best perfor m ance f r om this instrument. NOTE: in t he f ollowing descriptions two square brackets are used to define t he M odbus addr ess of a parameter.

MANUAL function

The MANUAL mode function [1503] allows to set directly the power output of the instrument . The transfer f r om AUTO to MANUAL and viceversa i s bum pless (this function is not provided if integral action is excluded). If transfer from AUTO to MANUAL is performed during the fir st par t of SMART algorithm (TUNE) when returning in AUTO t he device will be forced automatically in the second part of the SMART algorithm (ADAPTIVE). At power up the device will be in the AUTO mode or as it was left prior to power shut down depending on [1521] configurat ion selection. Note: When start up occurs in Manual mode the

power output (OUT1 - OUT2) is set to 0.

SMART function

It is used to automati cally optimize the control action.

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When t he SM ART function is enabled, it is possible to read but not to write the contr ol parameters (Pb, Ti, Td). Disabling the SMART function, the instrument maintains the actual set of contr ol paramet er s and it enables parameter modification. NOTES: When ON/OFF cont rol is programmed

(Pb=0), the SMART f unction is disabled.

Synchronous pre-heating

This function elimi nates differential heating during machine start up due t o differing heating rates of indiv idual heaters.

This function oper at e as follows: At instrument st ar t up all controllers use the first measured value as initial set point and t han t hey start a ramp from this set point to the final set point previously programmed. All common alarms are set as band alarms and are connected with the common logic input. In this way if the measure of one loop goes out of the tracking band, t he com m on alarm will close the common logic input and the ramp execution of all the loops will be hold. The ramp execution will restart when all measures come back in the tracki ng band.

In order to obtain this function, set the instruments as follows:

1) The alarm 3 is a band alarm ([1903] = 2, [1904] = 0, [1905] = 0, [1906] = 0 and [1907] = 0)

2) The “operative set point at start up” m ust be set equal to “aligned to the measured value” ([1410] = 1)

3) The logic input is used for r am p hold ([1301] = 2)

4) The “rate of change for positive set point variation” [1408] and the “rate of change for negative set point variation” [ 1409] m ust be set between 1 and 100 digit per minut e according with the desired rate of change.

5) The common alarm output is connect ed with the common logic input.

Sequential address (Modbus) f or f r equently accessed parameter.

To maximize the data t r ansf er r at es bet ween the RFS and the host supervisory system im por t ant operating parameter s ar e gr ouped with sequential address (see operativ e gr oup [ 900] ) . To further incr ease dat a t r ansfer efficiency, all digital status inform at i on ar e transferred as one data word.

The system enables the RFS to communicate relevant parameter inf or m ation with a single data request, not a series of separ at e addr ess operations.

Energy management at start up

When you turn O N a multi- loops machine where all loops have the soft start function, at power up the ON and OFF period of t he cont r ol output of all loops will be (more or less) synchronous. This fact produces high current peaks. These instruments will use their Modbus address (all addresses are different) in order t o di splace the ON and OFF period of t he cont r ol output( s) . This facility signifi cant ly reduces maximum machine start-up curr ent requirements and offers potential savings in electrical installation capacity and cable requirements.

Availability of the not used I/O by serial link

All RFS I/O may be read directly over the Modbus communication i nt er face by the host supervisory system. Additionally, the communication host m ay write t o RFS output s that are not assigned as alarm or output functions. This facility expands avai lable PLC and host supervisory system I/O, simplifies machine troubleshooting and provides t he possi bility to perform remote di agnost i cs.

OFD function – Output failure detection (optional)

Using the CT input the out put failure detection function monitor s the current in the load driv en by the output 1. Load and actuator protecti on is provided in the following way:

- During the ON period of t he output, the instrument measures t he cur r ent through the load and it generates an alarm condition if t his current is lower than a pre-programmed threshold [1206]. A low current shows a partial or total break down of the load or actuator SSR.

- During the OFF peri od of t he output, the instrument measures t he leakage current through the load and it generates an alarm condition when this current is higher than a pre-programmed thr eshold value[1205]. A high

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leakage current shows a short circuit of the actuator.

“Soft start” function

This function allows to gradually warm up the machine during start up i n or der to delete thermal strength and to protect t he r aw material.

The energy applied is restricted ( by [1514]) for a programmable time [1515].

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GENERAL NOTES ON T HE M ODBUS RTU PROTO COL

This half duplex protocol accepts one master and one or more slaves. The physical interface should be of the RS-485 type. A single multidrop link can take up to 120 devices having the same "High input im pedance" as t he transceiver used.

The computer must be pr ogrammed to serve as a master controlling which slave has access to the link. All other slaves are in waiting state. Each slave has a unique address ranging from 1 to 254. Address "0" is a broadcast one. W hen the master sends a m essage with address "0", all slaves receive it and no one replies.

NOTE: The numerical value present in this text are expressed as:

- binary value if they are followed by b

- decimal value if they are not followed by any letter

- hexadecimal value if they are followed by h

TRANSMISSION FORMAT

The protocol uses the RTU (Remote terminal unit) mode of transmission. RTU is a binary method with byte format composed as follows:

1 start bit, 8 data bit, 1 parity bit (optional), 1 stop bit. The communication speed is selectable among 600, 1200, 2400, 4800, 9600 and 19200 baud. NOTE: If CPI (Configuration Port Interface) is used the transmission format is fixed

(19200 - 8 bits – No parity) and the address is fixed at 255 The broadcast address (0) is not admitted

COMMUNICATION PROCEDURE

The communication can be initiated only by the master unit; the slave units can transmit only after a query has been received from the master. The general format for the transmission from master to slave is the following:

RANGE BYTE

Slave address 1 Function code 1 Data n Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

The slave detects the start of a query frame when the delay time between two characters is greater than 3.5 T.U. (Time Unit = Time necessary to transmit one character).

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ERROR CHECK (CRC-16 Cyclical Redundancy Check)

The CRC-16 value is calculated by the transmitting device. This value is appended to the message. The receiving device recalculates a CRC-16 and compares the calculated value to the received value. The two values must be equal. The CRC-16 is started by first pre-loading a 16-bit register to all 1's. Then a process begins of applying successive the bytes of the message to the current contents of the register. Only the eight bits of data in each character are used for generating the CRC-16. Start and s top bits, and the parity bit if one is used, do not apply to the CRC-16. During generation of the CRC-16, each byte is exclusive ORed with the register contents. Then the result is shifted to the right , with a zero filled into the most signifi cant bit (MSB) position. If the LSB was a 1, the register is then exclusive ORed with a preset, fixed value. If the LSB was a 0, no exclusive OR takes place. This process is repeated until ei ght shifts have been performed. After the last shift, the next byte is exclusive ORed with the register's current value, and the process repeats for eight more shifts as described above. The final contents of the register, after all the characters of the message have been applied, is the CRC-16 value.

A procedure for generating a CRC-16 is:

1) Load a 16-bit register (CRC-16 register) with FFFFh (all 1's).

2) Exclusive OR the first byte of the message with the low byte of the CRC-16

3) Shift the CRC-16 register one bit to the right (toward the LSB), zero-filling the

MSB. Extract and examine the LSB.

4) (If the LSB was 0): Repeat Step 3 (another shift). (If the LSB was 1): Exclusive OR the CRC-16 register with the polynomial value A001h (1010 0000 0000 0001b).

5) Repeat Steps 3 and 4 until 8 shifts have been performed. When this is done,

a complete byte will have been processed.

6) Repeat Steps 2 through 5 for the next byte of the message. Continue doing this until all bytes have been processed.

7) The final contents of the CRC-16 register is the CRC-16 value.

When the CRC-16 (16 bytes) is transmitted in the message, the low byte will be transmitted first, followed by the high byte.

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An example of a C language function performing CRC generation is shown below.

/* --------------------------------------------------------------crc_16 calculate the crc_16 error check field

Input parameters: buffer: string to calculate CRC length: bytes number of the string

This function returns the CRC value.

--------------------------------------------------------------- */ unsigned int crc_16 (unsigned char *buffer, unsigned int length) { unsigned int i, j, temp_bit, temp_int, crc;

crc = 0xFFFF;

for ( i = 0; i < length; i++ ) { temp_int = (unsigned char) *buffer++;

crc ^= temp_int;

for ( j = 0; j < 8; j++ ) { temp_bit = crc & 0x0001;

crc >>= 1;

if ( temp_bit != 0 ) crc ^= 0xA001; } } return (crc); }

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Function code 1 and 2: Bits reading

These function codes are used by the master unit to request the value of a consecuti ve group of bits (max 24) which are representing the status of the slave unit.

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address (1-255) 1 Slave address (1-255) 1 Function code (01-02) 1 Function code (01-02) 1 Bit starting address (high byte) 1 Byte counter (n) 1 Bit starting address (low byte) 1 Data n Number of bits (high byte) 1 Error check (CRC-16) (low byte) 1 Number of bits (low byte) 1 Error check (CRC-16) (high byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

The "Data" field indicates the bits requested: the bit with lower address is in the bit 0 of the first byte, the next is in the bit 1, and so on. The eventual don’t care bits necessary to complete the last byte are equal to 0.

Example: Ask to slave at address 3 (3h) the status of 4 (4h) bits starting from bit 2000 (7D0h) “Digital outputs group”.

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address 03h Slave address 03h Function code 01h Function code 01h Bit starting address (high byte) 07h Byte counter 01h Bit starting address (low byte) D0h Data 0Ah Number of bits (high byte) 00h Error check (CRC-16) (low byte) D0h Number of bits (low byte) 04h Error check (CRC-16) (high byte) 37h Error check (CRC-16) (low byte) 3Ch Error check (CRC-16) (high byte) A6h

The byte in "Data" field (0Ah=000001010b) means: Bit 2000 status = 0 Status of output 1, output not energized

Bit 2001 status = 1 Status of output 2, output energized Bit 2002 status = 0 Status of output 3, output not energized Bit 2003 status = 1 Status of output 4, output energized Don’t care = 0 Don’t care = 0 Don’t care = 0 Don’t care = 0

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Function code 3 and 4: Words reading

These function codes are used by the master unit to read a consecutive group of words (16 bi t) which contain the value of the variable of the slave unit. The master can require a maximum of 20 words at a time.

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address (1-255) 1 Slave address (1-255) 1 Function code (03-04) 1 Function code (03-04) 1 Word starting address (high byte) 1 Byte counter (n) 1 Word starting address (low byte) 1 Data n Number of word (high byte) 1 Error check (CRC-16) (low byte) 1 Number of word (low byte) 1 Error check (CRC-16) (high byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

The "Data" field contains the requested words in the following format: high byte of the fi rst word, low byte of the first word, high byte of the second word, and so on. The "Data" field contains 8000h for not implemented addresses or for information not relevant in the actual device configuration.

Example: Ask to slave at address 1 (1h) the value of 3 (3h) words starting from word 1100 (44Ch) “Process variable input group”.

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address 01h Slave address 01h Function code 03h Function code 03h Word starting address (high byte) 04h Byte counter 06h Word starting address (low byte) 4Ch Data 00h Number of words (high byte) 00h Data 1Dh Number of words (low byte) 03h Data 00h Error check (CRC-16) (low byte) C5h Data 1Dh Error check (CRC-16) (high byte) 2Ch Data 00h

Data 03h Error check (CRC-16) (low byte) 1Dh Error check (CRC-16) (high byte) 70h

The 6 bytes in "Data" field (00h, 1Dh, 00h, 1Dh, 00h, 03h) are 3 words whose meaning is: Word 1100 value = 29 (1Dh) Input variable without filter, 29 °C

Word 1101 value = 29 (1Dh) Filtered input variable, 29 °C Word 1102 value = 3 (3h) Input type and range value for main input, Tc J –100

÷ 1000°C

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Function code 5: Single bit writing

By using this command, the master unit can change the state of one bit of the slave unit.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address (0*-255) 1 Slave address (1-255) 1 Function code (05) 1 Function code (05) 1 Bit address (high byte) 1 Bit address (high byte) 1 Bit address (low byte) 1 Bit address (low byte) 1 Data 2 Data 2 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1 Error check (CRC-16) (high byte) 1

* To use the address 0, see note 1 (“Broadcast” address) in the “Notes” section. "Data" field = 0h to reset the bit

= FF00h to set the bit

Example: Set bit 1003 (3EBh) of slave at address 35 (23h), “Manual reset of an al arm condi tion” in “Devic e management group”.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address 23h Slave address 23h Function code 05h Function code 05h Bit address (high byte) 03h Bit address (high byte) 03h Bit address (low byte) EBh Bit address (low byte) EBh Data FFh Data FFh Data 00h Data 00h Error check (CRC-16) (low byte) FAh Error check (CRC-16) (low byte) FAh Error check (CRC-16) (high byte) C8h Error check (CRC-16) (high byte) C8h

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Function code 6: Single word writing

By using this command, the master unit can change the value of one word (16 bit) of the sl ave unit.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address (0*-255) 1 Slave address (1-255) 1 Function code (06) 1 Function code (06) 1 Word address (high byte) 1 Word address (high byte) 1 Word address (low byte) 1 Word address (low byte) 1 Data 2 Data 2 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1 Error check (CRC-16) (high byte) 1

* To use the address 0, see note 1 (“Broadcast” address) in the “Notes” section. The 8000h value, present in the "Data" field, should be c onsidered as a don’ t care value, that is,

the value present in the device at this address will not be modified.

Example: Set word 1403 (57Bh) of slave at address 1 (1h) with value 240 (F0h), “Main set point” in “Setpoint group”.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address 01h Slave address 01h Function code 06h Function code 06h Word address (high byte) 05h Word address (high byte) 05h Word address (low byte) 7Bh Word address (low byte) 7Bh Data 00h Data 00h Data F0h Data F0h Error check (CRC-16) (low byte) F9h Error check (CRC-16) (low byte) F9h Error check (CRC-16) (high byte) 5Bh E rror check (CRC-16) (high byte) 5Bh

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Function code 8: Diagnostic

By using this command, the master unit can check the communicati on system to Slaves.

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address (1-255) 1 Slave address (1-255) 1 Function code (08) 1 Function code (08) 1 Sub-function (high byte) 1 Sub-function (high byte) 1 Sub-function (low byte) 1 Sub-function (low byte) 1 Data 2 Data 2 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1 Error check (CRC-16) (high byte) 1

The Sub-function code will not be processed by Slave, any code is accept. The Sub-function code and data passed in the request is returned (looped back) in the slave replay. The entire replay message is identical to the request

Example:

Request from master to slave Reply from slave to master

Range Byte Range Byte Slave address 01h Slave address 01h Function code 08h Function code 08h Sub-function (high byte) 00h Sub-function (high byte) 00h Sub-function (low byte) 00h Sub-function (low byte) 00h Data 55h Data 55h Data AAh Data AAh Error check (CRC-16) (low byte) 5Fh Error check (CRC-16) (low byte) 5Fh Error check (CRC-16) (high byte) 24h Error check (CRC-16) (high byte) 24h

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Function code 15: Multiple bits writing

This function code is used by master unit to set/reset a consecutive group of bits (Max 24).

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address (0*-255) 1 Slave address (1-255) 1 Function code (15) 1 Function code (15) 1 Bit starting address (high byte) 1 Bit starting address (high byte) 1 Bit starting address (low byte) 1 Bit starting address (low byte) 1 Number of bits (high byte) 1 Number of bits (high byte) 1 Number of bits (low byte) 1 Number of bits (low byte) 1 Byte counter (n) 1 Error check (CRC-16) (low byte) 1 Data n Error check (CRC-16) (high byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

* To use the address 0, see note 1 (“Broadcast” address) in the “Notes” section. The desired status of each bit is packed in the "Data" field (1 = ON, 0 = OFF). The status imposed for read only bits will be ignored. The command will be processed starting from the first bit and it will be executed or not executed depending on the actual device status. At the first error found, the command will be aborted and the slave will answer with an error.

Example: Send to slave, at address 2 (2h), the following set of 2 bits: Bit 2002 (7D2h) status = 0 (bit 0) Status of output 3, output not energized Bit 2003 (7D3h) status = 1 (bit 1) Status of output 4, output energized Filler = 0 (bit 2) Filler = 0 (bit 3) Filler = 0 (bit 4) Filler = 0 (bit 5) Filler = 0 (bit 6) Filler = 0 (bit 7)

NOTE: 1 byte with 2 bits and 6 filler bits must be sent

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address 02h Slave address 02h Function code 0Fh Function code 0Fh Bit starting address (high byte) 07h Bit starting address (high byte) 07h Bit starting address (low byte) D2h Bit starting address (low byte) D2h Number of bits (high byte) 00h Number of bits (high byte) 00h Number of bits (low byte) 02h Number of bits (low byte) 02h Byte counter 01h Error check (CRC-16) (low byte) 75h Data 02h Error check (CRC-16) (high byte) 74h Error check (CRC-16) (low byte) A6h Error check (CRC-16) (high byte) E6h

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Function code 16: Multiple words writing

This function code is used by the master unit to write a consecutive group of words . The master unit can change a maximum of 20 words at a time.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address (0*-255) 1 Slave address (1-255) 1 Function code (16) 1 Function code (16) 1 Word starting address (high byte) 1 Word starting address (high byte) 1 Word starting address (low byte) 1 Word starting address (low byte) 1 Number of words (high byte) 1 Number of words (high byte) 1 Number of words (low byte) 1 Number of words (low byte) 1 Byte counter (n) 1 Error check (CRC-16) (low byte) 1 Data n Error check (CRC-16) (high byte) 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

* To use the address 0, see note 1 (“Broadcast” address) in the “Notes” section. The data imposed for read only words will be ignored. The command will be processed starting from the first word and it will be executed or not executed depending on the actual device status. At the first error found, the command will be aborted and the slave will answer with an error. The 8000h value, present in the "data" field, should be c onsidered as a don’ t care value, this i s, the value present in the device at this address will not be modified.

Example: Set words 1505 (5E1h), 1506 (5E2h), 1507 (5E3h) of slave at address 10 (Ah) with 40 (28h), don’t care (8000h) and 300 (12Ch) values; “Proportional band”, “Hysteresis” and “Integral time” in “Control group”.

Command from master to slave Reply from slave to master

Range Byte Range Byte Slave address 0Ah Slave address 0Ah Function code 10h Function code 10h Word starting address(high byte) 05h Word starting address (high byte) 05h Word starting address (low byte) E1h Word starting address (low byte) E1h Number of words (high byte) 00h Number of words (high byte) 00h Number of words (low byte) 03h Number of words (low byte) 03h Byte counter 06h Error check (CRC-16) (low byte) D1h Data 00h Error check (CRC-16) (high byte) 89h Data 28h Data 80h Data 00h Data 01h Data 2Ch Error check (CRC-16) (low byte) F1h Error check (CRC-16) (high byte) DFh

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NOTES

6. Operative mode

1. "Broadcast" address

When using the writing codes (5, 6, 15 and

16) the slave address 0 is permitted: in this case all the slaves c onnected accept the command but do not give any reply.

2. Words format

Every time the information transfer is performed by using 2 bytes (1 word of 16 bits), the first byte transmitted is the most significant one. For the negative numbers the "two complement" format is used.

3. Reply time

The slave will start to send a reply from 2 ms to 700 ms after the end of the request detected by counting the received bytes.

4. Decimal digits

The decimal point that may be present in the value is ignored.

Example:

The value 204.6 is transmitted as 2046

(07FEh)

The value -12.50 is transmitted as -1250

(FB1Eh)

The number of decimal digits, if significant, is stated for each parameter (see the DEC column in the parameters tables). Some parameters have a variable number of decimal digits according to the configuration, as described below: PV number of decimal digits apply on

process variable [1105]

CT number of decimal digits apply on

current transformer read-out [1211]

OP number of dec imal digits apply on

output power [1524]

5. Local/remote status In this controller, unlike other Ero Electronic devices, the “Local/remote status” setting isn’t required. This means that the master unit can modify any parameters without set any local/remote status bit, moreover no “3 seconds timeout” will be applied.

"Operative mode" indicates the normal functioning status of the device (controlle r). In operative mode the master can read the whole parameters; the device returns 8000h for the meaningless one (for example: the threshold of a not configured alarm). The write operation is allowed only for a restricted number of parameters (for example: isn’t permitted to change the input configuration). In operative mode the controller checks the write data to be within the allowable limits (for example: the main set point must be inside the set point low and high limits).

7. Configuration mode

“Configuration mode” is intended to set-up the device, then the controller doesn’t work. In configuration mode the master can read and write the whole parameters. In configuration mode, unlike the operative mode, the device returns always a value for each parameters, even for the meaningless one; this is intended to clone exactly the unit. Moreover, no check is done by the device receiving parameters; it’s under the responsibility of the master to send a valid set of parameters. If the master fails to follow the above rule, it will be impossible to switch the controller in operative mode until the whole set of parameters will be valid.

8. Read / write access permissions

The access permissions are stated for each parameter in the description tables by means of two columns named “read” and “write” according the following meaning: O access allowed in operative mode C access allowed in configuration mode L acc ess allowed in calibration mode F access allowed in factory test mode

9. Software key for lock/unlock control parameters

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11. Communication parameters at start

Due to the lack of frontal panel, no one protection scheme is available for this device.

up.

When it is desired to regain the control of an instrument with an unknown set of communication parameter, you can operate in two different way:

10. Add ress space

The whole variables are addressable as

word as well as bit; the user may choose the better way according to the condition.

Although we suggest to manage analog

variables as words and boolean variables as bits, below is described the behavior to access analog variables (example: alarm

11.1. Make us e of the CPI adapter. The

instrument automatically recognizes the CPI adapter and it will use the following communication parameter set:

- Address = 255

- Baud rate = 19200

- Bite format = 8 bit without parity NOTE: this is a fixed parameters set and it is not configurable.

threshold) as bits and boolean variables (example: alarm status) as words.

- Reading analog variables as bits: if the

variable is not relevant in the actual device configuration (word value 8000h) or if the value is zero the bit is reset, otherwise the bit is set.

- Writing analog variables as bits: the reset

bit means 0000h, the set bit means 0001h.

- Reading boolean variables as words: a

reset variable is reported as 0000h, a set one is reported as 0001h.

Writing boolean variables as words: send

0000h to reset the variable, send a value different from 0000h and 8000h to set

11.2. At power up the instrument will start using the same communication parameter set used in presence of the CPI adapter.

- If the instrument receives a correct

Modbus request within the first 3 seconds, it will continue to operate with the same communication parameters.

- If, during the 3 seconds time-out, the

instrument doesn’t receive a correct request, it will set-up the communication interface with the parameter values previously programmed.

the variable.

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ERROR REPLY

If the "error check" is wrong or the function code is not implemented or a buffer overflow has been received, the slave does not send any reply to the master. If other errors are detected in the request or command frame, or the slave cannot reply with the requested values or it cannot accept the requested sets bec ause it i s in error c ondition, the s lave replies by forcing at "1" the bit 7 of the received "Function code" byte followed by an error code.

Error reply (from slave to master)

RANGE BYTE

Slave address 1 Function code (+80h) 1 Error code 1 Error check (CRC-16) (low byte) 1 Error check (CRC-16) (high byte) 1

List of error codes

ERROR CODE DESCRIPTION

2 Illegal data address 3 Illegal data value 9 Illegal number of data required

10 The parameter indicated cannot be modi fied

or command cannot be executed

Error 2 is issued only when the whole addresses involved in a read or write operation are not implemented on the device.

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DEVICE IDENTIFICATION GROUP (117)

Modbus

Address

DESCRIPTION

E A

FIRMWARE DEVICE CLASS

117

Availability: Always Value:

OC L F

413 for RFS FIRMWARE DEVICE LETTER

118

Availability: Always Value:

OC L F

‘A’ (41h) FIRMWARE REVISION

119

Availability: Always Value:

OC L F

Nr. of firmware revision Manufactured trade mark

120

50 (32h)

OC L F

Device identification code

121

Note:

Number of software revision x 100 + identificat ion code 54 ( 36h )

OC L F

Serial firmware identification code

122

Availability: Always Value:

L F

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OPERATIVE GROUP (900)

Note: On this group are repeated some information present in other groups. The purpose of this is to have these information at consecutive address. This solution allows to maximize the data transfer rates between the RFS and the host supervisory system.

O CT O CT

Modbus

Address DESCRIPTION

900 901 902 903

OUT 1 Leakage current measure value (in Ampere)

(Same as address 1201)

OUT 1 Load current measure value (in Ampere)

(Same as address 1203)

OUT 2 value (in %)

(Same as address 1501)

OUT 1 value (in %)

(Same as address 1500)

STATUS D15 = OUT 1 Leakage current measure updating (See address 1202) (0 = Measure updated)

(1 = Measure not updated)

D14 = 0 (Reserved) D13 = Status alarm 3 (0 = No alarm 1 = Alarm) D12 = Status alarm 2 (0 = No alarm 1 = Alarm) D11 = Status alarm 1 (0 = No alarm 1 = Alarm)

R A N G E

0 / 100 O O OP 0 / 100 O O OP

D E C

Default

Value

904

D10 = Status CT alarm (0 = No alarm 1 = Alarm) D 9 = OUT 1 Load current measure updating

(See address 1204) (0 = Measure updated) (1 = Measure not updated) D 8 = 0 (Reserved) D 7 = Status of Out 4 ( 0 = Out not energized 1 = Out energized ) D 6 = Status of Out 3 ( 0 = Out not energized 1 = Out energized ) D 5 = Status of Out 2 ( 0 = Out not energized 1 = Out energized ) D 4 = Status of Out 1 ( 0 = Out not energized 1 = Out energized ) D 3 = Digital input status ( 0 = Contact open 1 = Contact closed) D 2 = Auto / Manual ( 0 = Auto 1 = Manual) D 1 = control output Enabled or disabled ( 0 = Enabled 1 = Disabled) D 0 = SMART Enable or Disable ( 0 = Disabled 1 = Enabled)

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Modbus

Address DESCRIPTION

Filtered Input variable (in engineering units) Notes:

When a measure error is detected, the "Data field" contains one of these error codes:

905

906

907 908 909 910 911

30004 (7534h) = Under-range 30005 (7535h) = Over-range (or open input) 30014 (753Eh) = Error on reference junction

temperature (<-25 °C or >75 °C)

30050 (7562h) = Error on internal auto-zero

(Same as address 1101)

Input variable without filter (in engineering units) Notes:

When a measure error is detected, the "Data field" contains one of these error codes: 30004 (7534h) = Under-range 30005 (7535h) = Over-range (or open input) 30014 (753Eh) = Error on reference junction

temperature (<-25 °C or >75 °C)

30050 (7562h) = Error on internal auto-zero

(Same as address 1100)

Working set point (in engineering units)

(Same as address 1402)

Main set point (in engineering units)

(Same as address 1403)

Auxiliary set point (in engineering units)

(Same as address 1405)

Target set point (in engineering units)

(Same as address 1401)

Main volatile set point (in engineering units)

(Same as address 1404)

R A N G E

SP L.

SP H.

SP L.

SP H.

SP L.

SP H.

OC L F

D E C

PV PV

E A D

O PV

L F

O PV OOPV

Default

Value

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DEVICE MANAGEMENT GROUP (1000)

Modbus

Address

1000

1001

DESCRIPTION

Device mode Range:

0 = Operative mode 1 = Configuration mode

2 = Calibration mode

3 = reserved

Note:

When oper at ive mode is set a “Param eter Check Operation” is aut om at ically performed If an error is found the device answers with error code 10 and doesn’t enable the new status. Otherwise the device st ops any other addr ess t est , answers immediately, resets and restarts in operative mode The set in “Calibration” m ode is allowed only from configuration mode

Execute the PCO (Parameter Check Operation). It returns 0 if no error was found, otherwise it returns the Modbus address of the first wrong parameter.

Load default parameter values Range: 0 = No operation

R A N G E

W R E A D

I T E

OC L FOCL F

OC L F

D E C

1002

1003

1004

1 = Load default European table (TB1) 2 = Load default American table (TB2)

Note:

Using this command, the parameters related with the serial link will change immediately but the new values will become operative only when the instrument comes back to the operative mode.

Manual reset of the alarm conditions Range:

0 = No operation 1 = Alarm Reset

Data Management in Operative Mode Range:

0 = Only valid data are transmitted 1 = All the data are transmitted

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PROCESS VARIABLE INPUT GROUP (1100)

Modbus Address

1100

1101

1102

DESCRIPTION

Measured value without filter (in engineering units) Notes:

When an measure error is detected, the "Data field" contains one of these error codes: 30004 (7534h) = Under-range 30005 (7535h) = Over-range (or input open) 30014 (753Eh) = Error on reference junction

temperature (<-25 °C or >75 °C)

30050 (7562h) = Error on internal auto-zero

Filtered measured value (in engineering units) Note:

See “Measured value without filter” [1100]

Input type and range value for main input

Range:

0 = Tc L 1 = Tc L 2 = Tc J 3 = Tc J 4 = Tc K 5 = Tc K 6 = Tc N 7 = Tc R 8 = Tc S 9 = RTD Pt100 10 = RTD Pt100 11 = Linear 12 = Linear 13 = Linear 14 = Linear 15 = (reserved) 16 = (reserved) 17 = (reserved) 18 = (reserved) 19 = Tc L 20 = Tc J 21 = Tc K 22 = Tc N 23 = Tc R 24 = Tc S 25 = RTD Pt100 26 = RTD Pt100 27 = Tc T 28 = Tc T

( 0 ÷ 400.0 °C) ( 0 ÷ 900 °C) ( -100.0 ÷ 400.0 °C) ( -100 ÷ 1000 °C) ( -100.0 ÷ 400.0 °C) ( -100 ÷ 1370 °C) ( -100 ÷ 1400 °C) ( 0 ÷ 1760 °C) ( 0 ÷ 1760 °C) (-200.0 ÷ 400.0 °C) ( -200 ÷ 800 °C) ( 0 ÷ 60 mV) ( 12 ÷ 60 mv) ( 0 ÷ 20 mA) ( 4 ÷ 20 mA)

( 0 ÷ 1650 °F) ( -150 ÷ 1830 °F) ( -150 ÷ 2500 °F) ( -150 ÷ 2550 °F) ( 0 ÷ 3200 °F) ( 0 ÷ 3200 °F) (-200.0 ÷ 400.0 °F) ( - 330 ÷ 1470 °F) (-200.0 ÷ 400.0 °C) ( - 330 ÷ 750 °F)

R A N G E

R E A D

I T E

O PV

L F

Default

Value

TB1= 3

TB2= 20

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Modbus Address

1103 Initial scale value (*)

1104 Full scale value (*)

Decimal point position PV (Process variable). Range:

0 = No decimal figure 1 = One decimal figure

1105

1106

2 = Two decimal figures 3 = Three decimal figures

Note:

The write command is enabled only for linear

input. Offset adjustment (in engineering units) Note:

Not available for linear ranges

DESCRIPTION

R A N G E

-2000/4000 (for linear)

Range

limits

(for Tc/Rtd)

-2000/4000 (for linear)

Range

limits

(for Tc/Rtd)

-199 / 199

R E A D

L F

I T E

L F

Default

Value

TB1=0 TB2=0

TB1=400

TB2=1000

TB1 = 0 TB2 = 0

(*) Note: The minimum input span ([Full scale value] – [Initial scale value]), in absolute value,

must be greater than: 100 digits for linear input ranges 300 °C (550 °F) for Tc input ranges 100 °C (200 °F) for Rtd input ranges.

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CURRENT TRANSFORMER INPUT AND ALARM GROUP (1200)

Modbus

Address

1200

1201

1202

DESCRIPTION

CT alarm status ( “Load” and “Leakage” alarms) Range:

0 = No alarm

1 = Alarm

Note: Available only when the option is

programmed

OUT 1 Leakage current measured value (in Ampere)

Note: Available only when the option is programmed

OUT 1 Leakage current measure updating flag Range:

0 = Measure updated

1 = Measure not updated

Notes:

1) Available only when the option is programmed.

2) If the OFF period i s lower than 150 ms, t he instrument is not able to perf or m t his measure. This flag shows the status of the measure

OUT 1 Load current measured value

R A N

E A

Default

Value

O CT

1203

1204

1205

1206

(in Ampere)

Note: Available only when the option is programmed

OUT 1 Load current measure updating flag Range:

0 = Measure updated

1 = Measure not updated

Notes:

1) Available only when the option is programmed.

2) If the ON period is lower than 150 ms, the instrument is not able to perf or m t his measure.

This flag shows the status of the measure

Threshold for alarm on Leakage current (in Ampere)

Note: Available only when the option is programmed

Threshold for alarm on Load current (in Ampere)

Note: Available only when the option is programmed

0 / H. Scale

O CT

OC L FOCL F

TB1 = 50 TB2 = 50

TB1 = 100 TB2 = 100

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Modbus

Address

1207

1208

1209

DESCRIPTION

Active period of the load (for the current transformer) Range:

0 =Option not provided 1 =The load is energized when Out1 is

active (Relay "ON" or SSR=1)

2 =The load is energized when Out1 is not

active (Relay "OFF" or SSR=0)

CT Alarm reset type Range:

0 = Automatic reset

1 = Manual reset

Note: Available only when the option is

programmed

CT Alarm action Range:

0 = Direct action (relay energized in alarm

condition)

1 = Reverse action (relay de-energized in

alarm condition)

Note: Available only when the option is

R A N

OC L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

TB1 = 1 TB2 = 1

This configurat ion is the same made by

address 1806.

CT range (in Ampere)

1210

It is the nominal primary current of the current transformer used.

Note: Available only when the option is

10 / 100

Number of decimal figures for the CT measurement The resolution of the CT measurement is as follow:

0.1 A for CT range lower than 20 A

1211

1 A for CT range higher than 20 A

So that:

- When [1210] parameter is lower than 20 (A), the [1211] parameter will be equal to 1

- When [1210] parameter is higher than 20 (A), the [1211] parameter will be equal to 0

Note: CT alarm and Alarm 2 are in OR condition driving the output 3.

OC L FCL F

OC L F

TB1 = 10 TB2 = 10

TB1 = 1 TB2 = 1

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DIGITAL INPUT GROUP (1300)

Modbus

Address

1300

1301

DESCRIPTION

Digital input status

Range

0 = Input not active (contact open) 1 = Input act ive (contact closed)

Digital input function

Range

0 = O pt ion not used 1 = Di gi t al input used for “main set

point”/”auxiliary set point ” selection ( Input active means Auxiliary set point).

2 = Digital input used to hold the set point r am p

execution (Input activ e m eans ramp hold).

R A N G E

OC L F

OC L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

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SETPOINT GROUP (1400)

Modbus

Address

DESCRIPTION

R A N G E

Selected set point

1400

Range: 0 = Main set point

1 = Auxiliary set point

1401 Target set point (in engineering units) O PV

1402 Working set point (in engineering units) O PV

1403 Main set point (in engineering units)

1404 Volatile set point (in engineering units)

1405

Auxiliary set point (in engineering units)

Note: Available only if selectable

1406 Set point high limit (in engineering units)

1407 Set point low limit (in engineering units)

SP L. Limit /

SP H. LimitOCL FOCL F

SP L. Limit /

SP H. Limit

OOPV

SP L. Limit /

SP H. LimitOCL FOCL F

SP L. Limit /

H. Scale

L FOCL F

L. Scale /

SP H. LimitOCL FOCL F

1 / 100

Rate of change for positive set point

1408

variation (gradient in engineering units per minute)

32767

(7FFFh)

for step

L FOCL F

change

1 / 100

Rate of change for negative set point

1409

variation (gradient in engineering units per minute)

32767

(7FFFh)

for step

L FOCL F

change

D E C

Default

Value

TB1 = 0 TB2 = 0

TB1 = 400 TB2 = 1000

TB1 = 0 TB2 = 0

TB1 =

7FFFh

TB2 =

7FFFh

TB1 =

7FFFh

TB2 =

7FFFh

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Modbus

Address

1410

DESCRIPTION

Operative set point alignment at start-up Range:

0 = The operative set point will be

aligned to the set point selected by digital input or by the serial link

1 = The operative set point will be

aligned to the actual measured value and then it will reach the selected set point with the programmed ramp (Address 1408 / 1409).

NOTE: if the instrument detect an out of

range or an error condition on the measured value, it will operate as described for [1410] = 0

Set point selection source

R A N G E

R E

L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

1411

1412

1413

1414

Range:

0 = Set point selected by digital input. 1 = Set point selected by serial link

(address 1412) Set point selected by serial link Range: 0 = Main set point

1 = Auxiliary set point Delta applied to the Main set point

(in engineering units) This value will be algebraically added

to the main set point (address 1403) and then limited.

Delta applied to the volatile set point (in engineering units)

This value will be algebraically added to main set point (address 1404) and then limited.

L FOCL F

-6000 / 6000 O

TB1 = 0 TB2 = 0

1415

Delta applied to the Auxiliary set point (in engineering units)

This value will be algebraically added to auxiliary set point (address 1405) and then limited.

-6000 / 6000 O

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Notes about set point management NOTE 1

In order to make clear the result of different set of the various parameter, we have added the following diagram.

Main SP

SP selection by serial link [1412]

Digital input

[1403]

Main volatile SP

[1404]

Auxiliary SP

[1405]

SP selection source [1411]

[1301]

OFF

TSP

Targ et set

point [1401]

Selected SP

indicator

[1400]

Ramp hold

Ramp up [1408]

Ramp down [1409]

Working

set point

[1402]

NOTE: the main SP (1403) is a value memorized in EEPROM while the main volatile SP (1404) is a value memorized in RAM. For this reason, when you make a profile setting the set point value by serial link (e.g. with a supervisory system), it is advisable to use the main volatile SP, instead of the main SP (the EEPROM has a limited number of write actions allowed while the RAM has no limit).

NOTE 2

Parameters [1413], [1414] and [1415] allow you to increase or decrease a set point without knowing the current set point value. This solution allows you to modify of the same quantity the set point (Main set point, volatile set point or auxiliary set point respectively) of different instruments at the same time.

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CONTROL (OUTPUT 1) GROUP (1500)

W R

O O PV

Modbus Address

1498 1499

DESCRIPTION

Main set point (volatile)

(Same as address 1404)

Main set point

(Same as address 1403)

R A N G E

SP L. Limit/

SP H.Limit

SP L. Limit/

SP H.LimitOCL FOCL F 1500 OUT 1 value (in %) 0 / 100 O O OP 1501 OUT 2 value (in %) 0 / 100 O O OP

1502 Pid out value

-32767 / 32767

O O OP

Auto/manual function

1503

Range:

0 = Auto

OC L FOCL F

1 = Manual

Enable/disable control output

1504

Range:

0 = Control enabled

OC L FOCL F

1 = Control disabled

10 / 1000

(for H only)

1505 Proportional band (in % of the input span)

15 / 1000

(for H/C)

OC L FOCL F

(for ON/OFF)

Hysteresis for ON / OFF control mode (in % of

1506

the input span)

Note: Available only when Proportional band is set to zero.

1 / 100

OC L FOCL F

Integral time (in seconds)

1507

1508

Note:

The value 32767 (7FFFh) means that the integral action is excluded

Integral pre-load (in % of the output span) Default value for Heating action 30% Default value for Heating/cooling action 0%

1 / 1200

0 / 100

(for H only)

-100 / 100

(for H/C)

1509 Derivative time (in seconds) 0 / 600

OC L FOCL F

Default Value E C

TB1 = 240 TB2 = 240

TB1 = 0 TB2 = 0

TB1 = 40 TB2 = 40

TB1 = 5 TB2 = 5

TB1 = 30 TB2 = 30

TB1 = 60 TB2 = 60

1510 Out 1 Cycle time (in seconds) 1 / 200

Relative cooling gain

1511

Note: Available only for HC control

20 / 100

OC L FOCL F

TB1 = 15 TB2 = 15

TB1 = 100 TB2 = 100

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Modbus Address

DESCRIPTION

Dead band/overlap between H/C outputs (in % of the proportional band)

1512

Notes:

1) Available only for HC control

2) A negative value produces an dead band

while a positive value produces an overlap

1513

Out 2 Cycle time (in seconds)

Note: Available only for HC control

1514 Output high limiter (in %) (**)

Time duration of the output power limiter (soft

1515

start) (in minutes) (**)

Note:The value 32767 (7FFFh) means that the limiting action i s always on

Control output max rate of rise (in percent of

1516

the output per second)

Note:The value 32767 (7FFFh) means that no ramp limitation i s imposed.

Out 1 action

1517

Range:

0 = Direct 1 = Reverse Control action type

1518

Range:

0 = The process is controlled by PID actions

1 = The process is controlled by PI actions

1519

Threshold to enable the soft start (output power limiting) (in engineering units) Inhibit reset band extension A positive value increases the high limit of the

1520

Anti-reset-wind up (over set point) A negative value decreases the low limit of the Anti-reset-wind up (under set point) Device status at instrument start up Range:

0 =It starts always in auto mode

1 =It starts in the same way it was left prior

to the power shut down. If in manual mode the power output is set to 0

1521

2 =It starts in the same way it was left prior

to the power shut down. If in manual mode the power output will be equal to the last value used left prior to the power shut down.

3 =It starts always in manual mode with

power output set to 0

R A N G E

-20 / 50

1 / 200

R E A D

OC L FOCL F

0 / 100

(for H only)

-100 / 100

(for H/C)

1 / 540

1 / 25

OC L FOCL F

OC L FCL F

L. Scale /

H. ScaleOCL FCL F

-30 / +30 (in % of the proportional

OC L FCL F

band)

OC L FCL F

W R

T E

Default Value E C

TB1 = 0 TB2 = 0

TB1 = 10 TB2 = 10

TB1 = 100 TB2 = 100

TB1 = 7FFFh TB2 = 7FFFh

TB1 = 7FFFh

TB2 = 7FFFh

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

TB1 = 10 TB2 = 10

TB1 = 2 TB2 = 2

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Modbus Address

1522

1523

1524

DESCRIPTION

Condition for output safety value Range:

0 = No safety value (Standard setting) 1 = Safety value applied when over range or under range condition is detected 2 = Safety value applied when over range condition is detected 3 = Safety value applied when under range condition is detected

Output safety value (in %)

When t he cont r oller detects an out range condition. Note: Available only if used

Number of decimal figures of parameters with DEC attribute set in OP

R A N G E

0 / 100

(for H only)

-100 / 100

(for H/C)

W R

OC L FCL F

OC L F

Default Value E C

TB1 = 0 TB2 = 0

(**) NOTE: the parameters [1514] and [1515] allow to set the soft start function. At power up the instrument limits the power output (using [1514]) for a programmed time (set by [1515]. This function allows to gradually warm up the machine during start up in order to delete thermal strength and to protect the raw material.

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SMART GROUP (1600)

Modbus

Address

1600

1601

1602

1603

DESCRIPTION

Tune status Range:

0 = No tune

1 = Tune Adaptive status Range:

0 = No adaptive

1 = Adaptive Smart enable/disable

Range:

0 = Disable

1 = Enable

Note: Reading, this bi t is logical “or” between Tune

and Adaptive status

Relative cooling gain calculated by the smart algorithm Range:

0 = Smart does not calculate R.C.G.

1 = Smart calculates R.C.G.

Note: Available only for HC control

R A N G E

OC L FOCL F

OC L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

1604

1605

1606

1607

Type of cooling media Range

0 = Air is used as cooling media 1 = Oil is used as cooling media 2 = Direct water is used as cooling media

Changing [1604], the instr um ent forces the cycle time and relative cooling gain par am et er to the default value related with the chosen cooling media When [1604] = AIr - Cy2 = 10 s and rC = 1.00

[1604] = OIL - Cy2 = 4 s and rC = 0.80

[1604] = H2O - Cy2 = 2 and rC = 0.40 Note: Available only for HC control

Max value of proportional band calculated by the smart algorithm

Min value of proportional band calculated by the smart algorithm

Note: Not available for HC control

Min value of proportional band calculated by the smart algorithm

Note: Available only for HC control

OC L FCL F

Min. Value

/ 1000

OC L FCL F

10 /

Max. valueOCL FCL F

15 /

Max. valueOCL FCL F

TB1 = 0 TB2 = 0

TB1 = 300 TB2 = 300

TB1 = 15 TB2 = 15

TB1 = 10 TB2 = 10

1608

Min value of integral time calculated by the smart algorithm (in seconds)

1 / 120

OC L FCL F

TB1 = 50 TB2 = 50

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ALARM 1 (OUTPUT 2) GROUP (1700)

Modbus

Address

1700

1701

1702

1703

1704

1705

DESCRIPTION

Alarm 1 status Range:

0 = No alarm

1 = Alarm

Note:

Available only if AL1 is configured

Alarm 1 threshold

Note: Available only if AL1 is configured

Alarm 1 hysteresis

(Range: from 0.1% t o 10. 0 % of t he range selected with [1103] and [1104] parameters or 1 LSD). Note: Available only if AL1 is configured

Out 2 function Range:

0 = Output not used 1 = Output used as alarm 1 output (Process alarm) 2 = Output used as alarm 1 output (Band alarm) 3 = Output used as alarm 1 output (Deviation alarm)

4 = Output used as cooling output Alarm 1 operating mode Range:

0 = High alarm (outside for band

alarm)

1 = Low alarm (inside for band

alarm)

Note:

Available only if AL1 is configured

Alarm 1 reset type Range:

0 = Automatic reset

1 = Manual reset

Note:

Available only if AL1 is configured

R A N G E

L. Scale /

H. Scale

(for Process alarm)

0 / 500

(for Band alarm)

-500 / 500

(for deviat ion alarm)

1 / 100

OC L FOCL F

OC L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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Modbus

Address

1706

1707

DESCRIPTION

Alarm 1 action Range:

0 = Direct action (relay energized in

alarm condition)

1 = Reverse action (relay

de-energized in alarm condition)

Note:

Available only if AL1 is configured

Alarm 1 stand-by (mask) function Range:

0 = No standby function

1 = Standby function

Notes:

1) Available only if AL1 is configured

2) If the alarm is programmed as band or

deviation alarm, this function masks the alarm condition after a set point change or at the instrument start-up until the process variable reaches the alarm threshold plus or minus hysteresis.

If the alarm is programmed as a process alarm, this function m asks the alarm condition at inst r um ent start-up until process var i able reaches the alarm threshold plus or minus hysteresis.

R A N G E

OC L FCL F

D E C

Default

Value

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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ALARM 2 (OUTPUT 3) GROUP (1800)

Modbus

Address

1800

1801

1802

1803

1804

1805

DESCRIPTION

Alarm 2 status Range:

0 = No alarm 1 = Alarm

Note:

Available only if AL2 is configured

Alarm 2 threshold

Note: Available only if AL2 is configured

Alarm 2 hysteresis

(Range: from 0.1% t o 10. 0 % of t he range selected with [1103] and [1104] parameters or 1 LSD). Note: Available only if AL2 is configured

Out 3 function Range:

0 = Output not used for alarm 2 1 = Output used as alarm 2 output (Process alarm) 2 = Output used as alarm 2 output (Band alarm) 3 = Output used as alarm 2 output (Deviation alarm)

Note:

Alarm 2 and CT alarm outputs are

in OR condition. Alarm 2 operating mode Range:

0 = High alarm (outside for band

alarm)

1 = Low alarm (inside for band

alarm)

Note:

Available only if AL2 is configured

Alarm 2 reset type Range:

0 = Automatic reset

1 = Manual reset

Note:

Available only if AL2 is configured

R A N G E

L. Scale /

H. Scale

(for process alarm)

0 / 500

(for band alarm)

-500 / 500

(for deviat ion alarm)

1 / 100

OC L FOCL F

OC L FCL F

Default

Value

TB1 = 0 TB2 = 0

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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Modbus

Address

1806

1807

DESCRIPTION

Alarm 2 action Range:

0 = Direct action (relay energized in

alarm condition)

1 = Reverse action (relay

de-energized in alarm condition)

Note: This configuration is the same of

that at address 1209 Available only if AL2 is configured

Alarm 2 stand-by (mask) function Range:

0 = No standby function

1 = Standby function

Notes:

1) Available only if AL2 is configured

2) If the alarm is programmed as band or

deviation alarm, this function masks the alarm condition after a set point change or at the instrument start-up until the process variable reaches the alarm threshold plus or minus hysteresis. If the alarm is programmed as a process alarm, this function m asks the alarm condition at inst r um ent start-up until process var i able reaches the alarm threshold plus or minus hysteresis.

R A N G E

OC L FCL F

Default

Value

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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ALARM 3 (OUTPUT 4) GROUP (1900)

Modbus

Address

1900

1901

1902

1903

1904

1905

DESCRIPTION

Alarm 3 status Range:

0 = No alarm

1 = Alarm

Note:

Available only if AL3 is configured

Alarm 3 threshold

Note: Available only if AL3 is configured

Alarm 3 hysteresis

(Range: from 0.1% t o 10. 0 % of t he range selected with [1103] and [1104] parameters or 1 LSD). Note: Available only if AL3 is configured

Out 4 function Physically available only through bus connector J2 Range:

0 = Output not used for alarm 3 1 = Output used as alarm 3 output (Process alarm) 2 = Output used as alarm 3 output (Band alarm) 3 = Output used as alarm 3 output

(Deviation alarm) Alarm 3 operating mode Range:

0 = High alarm (outside for band

alarm)

1 = Low alarm (inside for band

alarm)

Note:

Available only if AL3 is configured

Alarm 3 reset type Range:

0 = Automatic reset

1 = Manual reset

Note:

Available only if AL3 is configured

R A N G E

L. Scale /

H. Scale

(for Process alarm)

0 / 500

(for Band alarm)

-500 / 500

(for deviat ion alarm)

1 / 100

OC L FOCL F

OC L FCL F

D E C

Default

Value

TB1 = 0 TB2 = 0

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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Modbus

Address

1906

1907

DESCRIPTION

Alarm 3 action Range:

0 = Direct action (relay energized in

alarm condition)

1 = Reverse action (relay

de-energized in alarm condition)

Note:

Available only if AL3 is configured

Alarm 3 stand-by (mask) function Range:

0 = No standby function

1 = Standby function

Notes:

1) Available only if AL3 is configured

2) If the alarm is programmed as band or

deviation alarm, this function masks the alarm condition after a set point change or at the instrument start-up until the process variable reaches the alarm threshold plus or minus hysteresis.

If the alarm is programmed as a process alarm, this function m asks the alarm condition at inst r um ent start-up until process var i able reaches the alarm threshold plus or minus hysteresis.

R A N G E

OC L FCL F

D E C

Default

Value

TB1 = 1 TB2 = 1

TB1 = 0 TB2 = 0

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DIGITAL OUTPUTS GROUP (2000)

Modbus

Address

2000

2001

2002

DESCRIPTION

Output 1 status Range

0 =Output not energized

1 =Output energized Output 2 status Range

0 =Output not energized

1 =Output energized Note:

Writing to this parameter is allowed in

operative mode only if the output is not

driven by an internal function (like alarm). Output 3 status

Range and note: see “Status of output 2”

R E

L FCL F

L FOCL F

D E C

2003

Output 4 status Range and note: see “Status of output 2”

L FOCL F

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COMMUNICATION GROUP (2100)

Modbus

Address

2100

2101

DESCRIPTION

Serial link device address

Note:

When you set a new value, it will become operative aft er an instrument resets or r em oving the CPI. If you made a request before the reset the device will reply the new value but it continue to use the old one. Keep attention to the dat a set because at the instrument start-up, if incompat i ble data are found, the serial line will be set with fixed parameters: Address 255 Baud rate 19200 Byte format 8 bits without parity

Baud rate for serial link Range:

0 = 600 Baud 1 = 1200 Baud 2 = 2400 Baud 3 = 4800 Baud 4 = 9600 Baud 5 = 19200 Baud

R A N G E

1 / 254

OC L FOCL F

D E C

Default

Value

TB1 = 1 TB2 = 1

TB1 = 5 TB2 = 5

2102

Note:

See note on “Serial link device address” parameter.

Byte format for serial link Range:

0 = 8 bits + even parity 1 = 8 bits + odd parity 2 = 8 bits without parity

Note:

See note on “Serial link device address” parameter.

OC L FOCL F

TB1 = 2 TB2 = 2

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GENERAL SPECIFICATIONS Case: Polycarbonate dark grey color self-

extinguishing degree: V2 accor ding to UL 746C.

Protection: IP20 Terminals: 23 screw terminals ( screw M3, for

cables from 0.25 to 2.5 mm2 or from AWG 22 to AWG 14 ) with connect ions diagram.

Dimensions: DIN 43700 120 x 101 x 22.5 mm. Weight: - of t he RFS = 140 g.

- of the common I/O uni t = 110 g. Power supply: 24 V AC/DC (+ 10 % of the nominal value).

Power consumpti on: 6 VA max (4 W). Sampling time: 250 ms for linear inputs

500 ms for TC and RTD inputs. Accuracy: + 0,2% f.s.v.. + ambient temperat ur e. Common mode rejection: >120 dB @ 50/ 60 Hz.

Normal mode rejection: >60 dB @ 50/60 Hz. Electromagnetic compatibility and safety requirements: This instrument is marked CE.

Therefore, it is conforming to council direct ives 89/336/EEC and to council directives 73/23/EEC and 93/68/EEC (reference harm onized standard EN 61010-1). Installation cat egor y (over-voltage category): CAT II / 50V

Pollution degree: 2 Operative temperatur e: from 0 to 50 °C (+32 to

122 °F). Storage temperature: -20 t o + 70 °C ( - 4 to 158 °F) Humidity: from 20 % to 85% RH, non condensing.

Operating alti t ude: up to 2000mt

INPUTS

1 digit @ 25 °C

Type STD

J IEC 584-1

K IEC 584-1

DIN

43710 -

B) RTD (Resistance Temperature Detector) Type: Pt 100 3 wires connection. Line resistance: automatic compensation up to

20 Ω/wire with not measurable error. Engineering units: °C or °F pr ogr ammable. RTD sensor current: 130 µA Burnout: up scale. NOTE: a special test is provided to si gnal OVERRANGE when input resistance is less than 12 Ω.

1977

N IEC 584-1

R IEC 584-1

S IEC 584-1

T IEC 584-1

Eng

unit

-100.0 400.0 400

°C °F -150 1830 °C °F -150 2500 °C °F 0 1650

°C -100 1400 °F -150 2550 °C 0 1760 °F 0 3200 °C 0 1760 °F 0 3200 °C -200.0 400.0 °F -330 750

-100 1000

-100.0 400.0 400

-100 1370

Tempe

Range

0.0 400.0 400 0 900

rature drift (PPM)

200

500

400

A) THERMOCOUPLE Type : L -J -K -N -R -S -T. °C/°F selectable. External resistance: 100 Ω max. Burn out: It is shown as an overrange

(standard) or an underrange condition (selectable by cut and short)

TC sensor current: 150 nA. Cold junction: automat i c compensation from 0

to 50 °C.

Cold junction accuracy : 0.1 °C/°C Input impedance: > 1 MΩ

Type STD

RTD Pt100

DIN 43760

Eng

unit

°C

°F

Range

-200.0 400.0 500

-200 800 400

-200.0 400.0 800

-330 1470 400

Tempe rature drift (PPM)

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C) LINEAR INPUTS Read-out: programmable from - 2000 to +4000. Decimal point: pr ogr am m able in any position Burn out: the instr um ent shows the burn out

condition as an underrange condit ion for 4-20 mA, 0-60 mV and 12-60 mV input t ypes.

Input

Sensor Type

Current

Voltage

D) LOGIC INPUT

The instrument is equipped with one programmable input from cont act (voltage free)

NOTES:

1) Use an ext er nal dry contact capable of switching 5 mA, 7.5 V DC.

2) The instrument needs 100 ms t o r ecognize a contact status variation.

3) The logic input is isolated by the measuring input.

C) CURRENT TRANSFORMER INPUT Input current: 50 m A rm s 50/ 60 Hz. Read-out: selectable between 10 and 100 A. Resolution:

- 0.1 A for 20 A range.

- 1 A for all the other ranges.

Active period:

- for r elay output: NO or NC progr am m able

- for SSR drive output: logic level 1 or 0

programmable. Minimum tim e dur ation of the active peri od: 50 ms.

SET POINT S

This instrument allows to use 2 set points: main SP and auxiliary SP (SP2). Set point transfer: The transfer between one set point t o another (or between two different set point values) may be realized by a step transfer or by a ramp with two different programm able rate of change (ramp up and ramp down).

Slope value: 1 - 100 eng. uni t / m in or step. Set points limi t er : programmable.

0/20 mA 4/20 mA 0/60 mV

12/60 mV

impedance

< 5

< 5 > 1M > 1M

Ω Ω

Temperature drift (ppm/°C of full span)

300

CONTROL ACTIONS Control action: PID + SMART

Type: One (heating or cooling) or two (heating

and cooling) control outputs. Proportional Band (Pb): Range: - from 1.0 to 100. 0 % of t he input span

for process with one control output.

- from 1. 5 to 100.0 % of the input span f or process with two control outputs.

When Pb=0, the control action becomes

ON/OFF. Hysteresis (for ON/OFF control action): from 0.1% to 10.0% of t he input span. Integral time (Ti): from 1s to 20 min. or excluded. Derivative time ( Td): from 0 s to 10 min. If zero value is selected, the derivati ve action is excluded. Integral pre-load:

- from 0 to 100 % for one cont r ol output

- from -100 (cooling) to + 100 % ( heating) for two control outputs.

SMART: enabling/disabling Auto/Manual mode: selectable. Manual/Auto transfer: bum pless method type

OUTPUTS Control output updati ng time :

- 250 ms when a linear input is selected

- 500 ms when a TC or RTD input is selected.

Action: di r ect /reverse programm able. Output status indi cat ion: four indicators (OUT

1, 2, 3 and 4) are lit when the respective outputs are in ON condition. Output level li m i ter:

- For one control medium: from 0 to 100 % .

- For two control mediums: from -100 to +100 %

Cycle times:

- For out 1 it is pr ogr ammable from 1 to 200 s.

- For out 2 it is pr ogr ammable from 1 to 200 s. Relative cooling gai n: pr ogr am m able from

0.20 to 1.00. Overlap/dead band: programm able from - 20 % to + 50 % of the proport ional band

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Operative mode : High or low programmable. Threshold : programmable in engineering unit

within the input span.

Hysteresis: programmable from 0.1 % t o 10. 0 %

OUTPUT 1 Function: programmable as heating or cooling

output.

Type:

a) Relay output with SPST contact;

contact rating 3A / 250 V AC on r esi stive load.

b) Logic voltage for SSR driv e.

Logic status 1: 24 V +20% @ 1 mA.

14 V +20% @ 20 mA

Logic status 0: <0.5 V

of the input span ([1104] – [ 1103]).

Band alarm Operative mode: Inside or out side

programmable.

Threshold : pr ogr am m able from 0 t o 500 uni ts. Hysteresis : programmable from 0.1 % to 10.0

% of the input span.

OUTPUT 2 Function: programmable as:

- control output (cooling)

- Alarm 1 output

Type:

a) Relay output with SPST contact;

contact rating 3A / 250 V AC on r esi stive load.

b) Logic voltage for SSR driv e.

Logic status 1: 24 V +20% @ 1 mA.

14 V +20% @ 20 mA

Logic status 0: <0.5 V

OUTPUT 3 Function: Alarm 2 output. Type: relay with SPDT contact Contact rated: 3 A at 250 V AC on re si stive

load.

OUTPUT 4

Output type:open collector, optically isolated with

respect to the other cir c ui t s .

Rating: max 10 mA at 48 V

ALARMS Actions: Direct or rev er se act ing.

Alarm functions: each alarm can be configur ed

as process alarm, band alarm or deviation alarm. Alarm reset: automatic or m anual reset programmable on each alarm. Stand by (mask) alarm: each alarm can be configured with or without stand by (mask) function. This function allows to delete false indication at instrument start up and/or after a set poi nt change.

Deviation alarm: Operative mode : High or low programmable. Threshold : programmable from - 500 to +500

units. Hysteresis : programmable from 0.1 % to 10.0 % of the input span.

Communication int er f ace

Type: RS-485, opto-isolated Protocol: Modbus RTU, device acts as slave Baud-rate: 600, 1200, 2400, 4800, 9600 or

19200 baud

Data format: 8 bit without parity, 8 bit ev en

parity or 8 bit odd pari t y

Slave number: up to 120 RFS unit could be

connected to the same RS-485 network without using repeaters

MAINTENANCE

1) REMOVE POWER FROM THE POWER

SUPPLY TERMINALS AND FROM RELAY OUTPUT TERMINALS

2) Usi ng a vacuum cleaner or a compressed air

jet (max. 3 kg/cm2) remove all deposit of dust and dirt which may be present on the louvers and on the internal circuits t r ying t o be car eful for not damage the electronic component s.

3) To clean external plastic or rubber parts use

only a cloth moistened with:

- Ethyl Alcohol (pure or denatured) [C2H5OH]

- Isopropyl Alcohol (pure or denatured) [(CH3)2CHOH] or

- Water (H2O)

4) Verify that there are no loose termi nals.

5) Before re-power the instrument be sur e t hat it

is perfectly dry.

6) Turn the instrument O N.

Process alarm:

ero electronic RFS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual