CD Automation CD3000E Bedienungsanleitung

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CD3000E

Serial Communication

Manual

USER’S MANUAL

Rev. 08/20 3

00003

1 RS485 Serial Port

The serial communication port RS485 is available on the Command Terminals and on the 9pin DIN

male connector.

On this port may be done a network up to 27 CD3000E.

On the 9pin DIN male connector is also possible connect the CD-EASY (see par. Errore. L'origine

riferimento non è stata trovata.

)

Pin Descri tion

PMS5 (+5V)

2 GND 0V

3 GND 0V

4 Reserved (Rxd0)

5 GND 0V

6 RS485 A

7 RS485 B

8 nc

9 Reserved (Txd0)

Terminal Descri tion

RS485 A

2 RS485 B

3 For internal use

4 For internal use

2 MODBUS communication

The serial communication port of the thyristor unit is two-wire RS485 type.

This port use an half-duplex system.

When a Unit must transmit active the transmission line, and when there are not units in

transmission the outputs are fixed to high impedance.

The serial communication port allows to communicate between the thyristor units and a MASTER

device (ex. an computer or a terminal). The cable must be rated for use to data transfer

2.1 MODBUS RTU Protocol

The communication is based on the standard industrial MODBUS RTU with the following

restrictions

• The Baud rate can be 4800-9600- 9200 Baud (Standard 9200).

• The Preset Multiple Registers (Funct. 6) is limited to the writing of a single

parameter for message.

The following MODBUS functions are supported:

Function Descri tion

03 Read Holding Registers

6 Preset Multiple Registers

The unit support the Broadcast messages:

It' possible send a Broadcast messages using the address 0, all the units respond at

the message without sending back any reply.

2.2 Message Format

The transmission format is a bit start, 8 date bit, and bit stop with no parity verification.

Each message terminate after a said time of "time out", equal at 3.5 time of a character

transmission, where there are not transitions on the transmission line.

The first Byte of each message is always the address of the unit that is a value from to 255 or 0

for the broadcast messages, the second is always the function number, and the rest of the

message depends of the function demand.

When a Slave receive an message, the unit send an answer with the same structure

but with the information demanded.

Each message is followed by CRC (Cyclic Redundancy Check) with two byte. The CRC identify the

incongruity situations of the message, in this case the receiver ignore the message.

The CRC is calculated in accordance with a formula that imply a recursive division of the data by a

polynomial.

The polynomial divisor is:

+ 2

+ (Hex 8005)

but is modified in two ways:

• Since the bits order are reversed, then the binary pattern is also reversed, and the most

significant bit (MSB) is the right-most bit.

• Since interest only the remainder, the right-most bit could be discarded.

Therefore, the polynomial divisor has value: Hex A00

Normal bit order:

Most significant bit

Least significant bit

Most significant Byte Least significant Byte

Reversed bit order:

Least significant bit

Most significant bit

Least significant Byte Most significant Byte

N.B.: With the reversed bit order, also the CRC 6 returns the with the reversed bit order

The following flow-diagram show how to organize the CRC 6 bit.

C Language CRC 16 Exam le

static short CRC 6 (unsigned char *p_first,unsigned char *p_last)

{

unsigned int crc=0xffff;

short j;

for (;p_first<=p_last;p_first++)

{

crc ^= *p_first;

for(j=8;j>0;j--)

{

if(crc & 0x000 )

{

crc = crc >> ;

crc ^= 0xA00 ;

}

else

{

crc = crc >> ;

}

return (crc);

}

2.3 Read Holding Registers

This function reads the instantaneous value of only one specified number of parameter from an

address.

The message is composed by 8 Byte: one Byte is for the address, one for the function (03 Hex),

two Byte for the first parameter to read, two Byte for the total number of parameters to read that

fixed to 1 (0001 Hex)

, and finally two Byte for the CRC:

Address

Unit Function

Address of the First

Parameter N° of the Parameter

CRC 16

3Hex HI LO 0 LO HI

The answer is an echo of the first two Byte (address and function), one byte with the number of

following byte to exclusion of the CRC, the demanded values and finally two Byte for the CRC:

Address

Unit Function

N° of

Byte

First

Parameter

Value

CRC 16

3Hex 2 HI LO LO HI

2.4 Preset Multi le Registers

This function could write only a parameter for each message.

The message is composed by Byte: one Byte for the address, one for the function ( 0 Hex), two

Byte for first parameter to write, two Bytes for the N° of parameters, fixed to (000 Hex), one

Byte with the number of following Bytes, fixed to 2 (02 Hex), two Byte for the CRC:

Address

Unit Function

Address of the

First Parameter

N° of the

Parameter

N° of

Byte

Value to

write CRC 16

0Hex HI LO 0 2 HI LO LO HI

The answer is an echo of the first two Byte (address and function), two Byte for first written

parameter, two Byte with the N° of parameters, fixed to (000 Hex), two Byte for the CRC:

Address

Unit Function

Address of the

First Parameter

N° of the

Parameter CRC 16

0Hex HI LO 0 LO HI

2.5 Error and exce tion res onses

If a message contains an altered character, if fails the CRC, or if the received message contains a

syntax error (for example the number of the byte or of the words is not correct), then the unit will

ignore the message.

If the received message is correct but contains a not valid value, the unit will send an answer of

exception (5 byte):

Address Unit Function Error Code CRC 16

LO HI

The byte with the function number, represent the function number of the message that has caused

the error with the first Bit set to (ex. the function 3 becomes 0x83) The error code could be one

of the followings:

Error Code Name Cause

ILLEGAL FUNCTION Function not supported.

2 ILLEGAL DATA

ADDRESS Address out of range.

3 ILLEGAL DATA VALUE Attempt to write invalid or action not carried out.

NOTE: If you write a parameter's value equal at his actual value this is a valid

transaction and don't cause an error.

2.6 Address Configuration

The thyristor unit is assigned a unique device address by the user in the range (default) to

27 using the parameter P 5  in the Hardware menu. This address is used to recognise the

messages queries to her assigned.

The thyristor unit does not respond at the messages queries that don't have the same assigned

address.

The thyristor unit will also accept global messages (Broadcast) sends at the address 0. No

responses are returned for globally addressed queries.

3 Parameter List.

Status Code/Alarm 1

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





AL_1 1 H1

ALM

− 0 1 0 1

Bit 0 = 1 → Phase Loss



Bit 1 = 1 → N.A.



Bit 2 = 1 → N.A.



Bit 3 = 1 → N.A.



Bit 4 = 1 → External Alarm



Bit 5 = 1 → Heat Sink Over Tem .



Bit 6 = 1 → N.A.



Bit 7 = 1 → N.A.

Status Code/Alarm 2

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





AL_2 2 H2

ALM

− 0 1 0 1

Bit 0 = 1 → Thyristor Failure



Bit 1 = 1 → Heater Break Alarm



Bit 2 = 1 → Unbalanced Load



Bit 3 = 1 → N.A.



Bit 4 = 1 → N.A.



Bit 5 = 1 → N.A.



Bit 6 = 1 → N.A.



Bit 7 = 1 → N.A.

Local/Remote Set- oint selection

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





L--r 3 H3 Sw 0 0 1 0 1

0 = Analog set oint



1 = Digital set oint

Local Set- oint Value

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





L_SP 4 H4 % 0 0 4095 0 100,0

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

R/W All

Enable Start/Sto from serial Link

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





P005 5 H5 Sw 0 0 1 0 1

0= Start/Sto from terminal



1= Start/Sto from terminal + serial link

NOTE: Terminal command work in series

mode with serial communication

commands

Remote Set- oint value

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





r_SP 8 H8 % 0 0 4095 0 100,0

With in ut 4÷20mA:



In ut 4mA P008 



 = 0%



In ut 12mA P008 



 = 50%



In ut 20mA P008 



 = 100

Voltage Su ly

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





V_Ln 11 HB V − 0 4095 0 1000

Maximum Out ut

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





O tN 19 H13 % 100,0 2048 4095 50,0 100,0

Firing Mode Selection (2PH)

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note



Fir 23 H17 Sw 0* 0 2 0 2

0= BURST firing mode



2= DELAY TRIGGERING mode

Par.

Ty e

Unit

Ty e

R/W All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

R All

Par.

Ty e

Unit

Ty e

R/W All

Par.

Ty e

Unit

Ty e

R/W

2PH

Only

Firing Mode Selection (3PH)

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note



Fir 23 H17 Sw 1* 0 2 0 2

0= BURST firing mode



1= PHASE ANGLE mode



2= DELAY TRIGGERING mode

Ram U

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





rP- 24 H18 sec

2 0 1000 0 1000

Ram Down

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





rP-d 25 H19 sec

2 0 1000 0 1000

Average voltage out ut on the three hase(V)

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





Vo t 31 H1F V − 0 1000 0 1000

Average Power out ut on the three hase

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value



Po 32 H20 Kw − 0 1000 0 1000

RMS Current value on hase R

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





A__r 33 H21 A − 0 1000 0 1000

Par.

Ty e

Unit

Ty e

R/W

3PH

Only

Par.

Ty e

Unit

Ty e

R/W All

Par.

Ty e

Unit

Ty e

R/W All

Par.

Ty e

Unit

Ty e

R All

Par.

Ty e

Unit

Ty e

R All

Par.

Ty e

Unit

Ty e

R All

RMS Current value on hase S

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





A__S 34 H22 A − 0 1000 0 1000

RMS Current value on hase T

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value





A__t 35 H23 A − 0 1000 0 1000

Start/Sto

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





P045 45 H2D

P ls

0 0 1 0 1

0 = Sto



1 = Start

Reset

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





P047 47 H2F

P ls

0 0 1 0 1

0 = No o eation



1 = Enable RESET

Save value Minimum in ut 1

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note





LiA1

57 H39 Sw 0 0 1 0 1

0 = Default



1 = Save value

Save value Maximum in ut 1

Par.

Dis lay

Par.

Name

Address

DEC

Address

HEX UM

Default

Value

Min

Value

DEC

Max

Value

DEC

Min

Value

Max

Value

Sam le Values and Note









HiA1

58 H3A Sw 0 0 1 0 1

0 = Default



1 = Save value

Par.

Ty e

Unit

Ty e

R All

Par.

Ty e

Unit

Ty e

R All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

All

Par.

Ty e

Unit

Ty e

All

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