CD Automation REVO C Use and care manual

CD Automation Communication Manual Revo C
1
REVO C
Serial Communication
Manual
USER’S MANUAL
Rev. 12/2018
Preliminary
0011

CD Automation Communication Manual Revo C
2
Sommario
1 MODBUS-RTU communication protocol.......................................................................... 3
Communication Terminals 30-40A (SR9-SR10-SR11) 3
1.1.1 RS485 STANDARD SERIAL PORT.........................................................................................................................................3
1.1.2 SECOND SERIAL 485 CONFIGURATION CONNECTORS .........................................................................................................3
1.2 Communication Terminals 60-210A(From SR12 to SR17) 4
1.2.1 RS485 SERIAL PORT...........................................................................................................................................................4
1.2.2 SECOND SERIAL 485 CONFIGURATION CONNECTORS .........................................................................................................4
1.3 Communication Terminals 300-700A (S12-S13-S14) 5
1.3.1 RS485 SERIAL PORT...........................................................................................................................................................5
1.4 Fieldbus communication option 5
1.5 MODBUS communication 6
1.6 MODBUS RTU Protocol 6
1.7 Message Format 6
1.8 Read Holding Registers(function 03 / 03Hex) Read InputRegisters (function 04 / 04Hex) 8
1.9 Preset Multiple Registers (function 16/ 10Hex) 9
1.10 Preset single register (function 06/ 06Hex) 9
1.11 Error and exception responses 10
1.12 Address Configuration 10
1.13 Parameter List 11
2 Fieldbus....................................................................................................................... 20
2.1 MODBUS/TCP 21
2.1.1 GENERAL DESCRIPTION.....................................................................................................................................................21
2.1.2 PROFINET CONNECTION.................................................................................................................................................21
2.1.3 MODBUS/TCP PROTOCOL ..............................................................................................................................................22
2.1.4 PLC/DEVICE CONFIGURATION..........................................................................................................................................22
2.1.5 INSTRUMENT IP SETTING..................................................................................................................................................23
2.2 PROFINET 26
2.2.1 GENERAL DESCRIPTION.....................................................................................................................................................26
2.2.2 PROFINET CONNECTION.................................................................................................................................................26
2.2.3 PLC CONFIGURATION.......................................................................................................................................................28
2.3 PROFIBUS 32
2.3.1 GENERAL DESCRIPTION.....................................................................................................................................................32
2.3.2 PROFIBUS CONNECTION.................................................................................................................................................32
2.3.3 PLC CONFIGURATION.......................................................................................................................................................34
2.4 Data Exchange Area 36
2.4.1 READ AREA.......................................................................................................................................................................36
2.4.2 WRITE AREA .....................................................................................................................................................................42

CD Automation Communication Manual Revo C
3
1MODBUS-RTU communication protocol
Communication Terminals 30-40A (SR9-SR10-SR11)
1.1.1 RS485 standard Serial Port
M3 Terminal
Description
B-
RS485 B
A+
RS485 A
The serial communication port RS485 is
available on the Command.
On this port may be done a network up to 127
REVO C.
1.1.2 Second Serial 485 Configuration Connectors
M5 Terminal
Description
A+
RS485 A
B-
RS485 B

CD Automation Communication Manual Revo C
4
1 2 3 4 5
1.2 Communication Terminals 60-210A(From SR12 to SR17)
1.2.1 RS485 Serial Port
The serial communication port RS485 is available on the
Command.
On this port may be done a network up to 127 REVO C.
M1 Terminal
Description
11
RS485 A+
12
RS485 B-
1.2.2 Second Serial 485 Configuration Connectors
M4
Terminal
Description
1
+24V
2
GND
3
Not connected
4
RS485 A+
5
RS485 B-

CD Automation Communication Manual Revo C
5
1.3 Communication Terminals 300-700A (S12-S13-S14)
1.3.1 RS485 Serial Port
The serial communication port RS485
is available on the Command Terminals.
On this port may be done a network
up to 127 REVO C.
Terminal M1
Description
7
RS485 A
8
RS485 B
1.4 Fieldbus communication option
Other serial communication port are available as option.

CD Automation Communication Manual Revo C
6
1.5 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
1.6 MODBUS RTU Protocol
The communication is based on the standard industrial MODBUS RTU with the following
restrictions:
•The Baud rate can be 9600-19200-38400-115200 Baud (Standard 19200).
•The Preset Multiple Registers (Function 16) is limited to the writing of a single
parameter for message.
The following MODBUS functions are supported:
Function
Description
03/04
Read Holding Registers (max 121 reg.)
06
Preset Single Registers
16
Preset Multiple Registers (max 25 reg.)
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.
1.7 Message Format
The transmission format is a 1 bit start, 8 date bit, and 1 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 1 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 receives a message, the unit sends an answer with the same structure
but with the information requested.
Each message is followed by CRC (Cyclic Redundancy Check) with two bytes. The CRC identifies
the incongruity situations of the message, in this case the receiver ignores the message.
The CRC is calculated in accordance with a formula that implies a recursive division of the data by
a polynomial.
The polynomial divisor is:
216 + 215 + 22+ 1(Hex 18005)
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 A001

CD Automation Communication Manual Revo C
7
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 CRC16 returns the with the reversed bit order
The following flow-diagram shows how to organize the CRC 16 bit.

CD Automation Communication Manual Revo C
8
C Language CRC 16 Example
static short CRC16 (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 & 0x0001)
{
crc = crc >> 1;
crc ^= 0xA001;
}
else
{
crc = crc >> 1;
}
}
}
return (crc);
}
1.8 Read Holding Registers(function 03 / 03Hex)
Read InputRegisters (function 04 / 04Hex)
This function reads the instantaneous values of a specified number of parameters from an address.
The message is composed by 8 Byte:
•one Byte is for the address
•one for the function (03/04Hex)
•two Byte for the address of the first parameter to read
•two Byte for the total number of parameters to read (max 121)
•two Byte for the CRC
Address
Unit
Function
Address of the First
Parameter
N° of read
Parameter
CRC 16
3/4
3/4Hex
HI
LO
HI
LO
LO
HI
The answer is an echo of the first two Byte (address and function), one byte with the number of
byte following (CRC excluded), the demanded values and finally two Byte for the CRC.
Address
Unit
Function
N° of
Byte
First
Parameter
Value
Last
Parameter
Value
CRC 16
3/4
3/4Hex
2 -32
HI
LO
LO
HI
LO
HI

CD Automation Communication Manual Revo C
9
1.9 Preset Multiple Registers (function 16/ 10Hex)
This function could write maximum 25 parameters for each message.
The message is composed by:
•one Byte for the address
•one for the function (10 Hex)
•two Byte for first parameter address to write
•two Bytes for the N° of parameters
•one Byte with the number of following Bytes
•values to write, two Byte for the CRC:
Address
Unit
Function
Address of the
First Parameter
N° of the
Parameter
N° of
Byte
Value to
write
→
16
10Hex
HI
LO
HI
LO
2
HI
LO
→
→
First value
To write
Last value
To write
CRC 16
→
HI
LO
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 1 (0001 Hex), two Byte for the CRC.
Address
Unit
Function
Address of the
First Parameter
N° of the
Parameter
CRC 16
16
10Hex
HI
LO
0
1
LO
HI
1.10 Preset single register (function 06/ 06Hex)
This function writes a single Modbus paramter.
The message is composed by 8 Bytes:
•one Byte for the address,
•one for the function (6 Hex),
•two Bytes for the parameter address to write
•two bytes for the value to write
•two Bytes for the CRC
Address
Unit
Function
Address of the
First Parameter
Value to Write
CRC 16
6
6Hex
HI
LO
HI
LO
LO
HI
The normal response is a complete echo of the received message.

CD Automation Communication Manual Revo C
10
1.11 Error and exception responses
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 1 (ex. the function 3 becomes 0x83) The error code could be one
of the followings:
Error Code
Name
Cause
1
ILLEGAL FUNCTION
Function not supported.
2
ILLEGAL DATA ADDRESS
Address out of range.
4
FAILURE IN
ASSOCIATED DEVICE
Too Many parameter request
1.12 Address Configuration
The thyristor unit is assigned a unique device address by the user in the range 1 (default) to
247 using the parameter P115  in the Hardware menu. This address is used to recognize the
messages queries to her assigned.
The thyristor unit does not respond at the messages queries that don't have the same assigned
address.