Advantech EKI-1242PNMS Manuale utente

Protocol Gateway

EKI-1242PNMS

Quick Guide

v1.0

2017/10/26

1Induction

1.1 Overview

Advantech EKI-1242PNMS is a protocol gateway that provides users with the

following software features:

Gateway function to transfer data between Modbus TCP/RTU and PROFINET

I/O mapped command status and exception code

WEB-based GUI for I/O data visualization

Effortless configuration via WEB

Dual image

Easy backup & restore configuration via microSD card

Note. Device WEB page can be accessed only via Modbus TCP Ethernet port.

1.2 Software Specification

System:

Default IP Address: 192.168.1.1

User name in GUI: admin

Password in GUI: admin

PROFINET:

Class: Slave

Support 8 ms cyclic times

Support max. 64 slots

Support MRP Slave

Modbus TCP/RTU:

Class: Scanner

Function Code Supported: 1, 2, 3, 4, 5, 6, 15, 16, 23

Max. Number of Modbus Commands: 64

2Network Setting

The IP Settings menu allows you to select a static address or DHCP network

configuration. The Static address displays the configurable settings for the static

option.

To access this page, click Network Setting > IP Setting

Note: The gateway needs to be restarted before any changes will take effect.

3Serial Setting

The Serial Setting allows for the configuration of the serial interface type, baud

rate, parity, data/stop bits, and flow control for port configuration.

To access this page, click Serial Setting > Port

Parameter

Description

Type

Click the drop-down menu to select a serial interface: RS-232

RS-422 or RS-485.

Baud Rate

Enter a value to specify the baud rate. The value should conform

to the current transmission speeds of connected devices when

setting the baud rate

Parity

Click the drop-down menu to select the parity: None, Odd, Even,

Mark or Space

Data Bits

Click the drop-down menu to select the data bits: 5, 6, 7, or 8.

Stop Bits

Click the drop-down menu to select the stop bits: 1, 1.5 or 2.

Flow Control

Click the drop-down menu to select the flow control mode:

None, XOn/XOff, RTS/CTS.

4Protocol Setting

4.1 PROFINET Setting

On the PROFINET network, the gateway transmits mapped data to PROFINET

master though I/O data. The first two I/O mapped bytes in either direction can

be dedicated for status/control information, and another 64 bytes of data

coming from the Modbus TCP/RTU can feature the Modbus exception codes.

To access this page, click Protocol Setting > PROFINET Setting

4.1.1 Status/Control Word

Through the dedicated control word, the scanner on the PROFINET network

starts/stops the exchange of data on the Modbus TCP/RTU network. The

master on the PROFINET network can see the status of the Modbus TCP/RTU

network in the corresponding status word.

The Control word is a 16-bit word used by the PROFINET network to control

the gateway and subsequently also the Modbus TCP/RTU network.

Bit

Value

Description

0-1 (Least

significant bit)

01b

Puts the gateway in idle state.

10b

Puts the gateway in running state.

2-15

(reserved)

Unused

The Status word is a 16-bit word used by the gateway to report its current

actual status to the PROFINET network.

Bit

Value

Description

0-1 (Least

significant bit)

01b

The gateway is in idle state.

10b

The gateway is in running state.

2-15

(reserved)

Unused

4.1.2 Exception Code

The except code feature gives the scanner on the PROFINET network the

opportunity to continuously see and monitor the status of each individual

Modbus request on the Modbus TCP/RTU network. It contains a byte array

with 64 elements, where each byte contains an Modbus exception code as

in the table below. The indexes in the exception code list correspond

completely to the sequence of the Modbus Commands.

Byte 0

Byte 1

Byte 2

Byte 63

Exception code

for command 0

Exception code

for command 1

Exception code

for command 2

…

Exception code

for command 63

Standard Modbus exception codes:

Exception

Code

Description

No error

Illegal function

Illegal data address

Illegal data value

Slave device failure

Acknowledge

Slave device busy

Memory parity error

Gateway path unavailable

Gateway target device failed to respond

Note: The gateway needs to be restarted before any changes will take effect.

4.2 Modbus Setting

On the Modbus TCP/RTU network side, the gateway will act as a Modbus

TCP/RTU master. The gateway provides an internal memory for data exchange

between Modbus TCP/RTU and PROFINET. For each Modbus read/write

command, specify the internal memory address for data exchange. For the read

command, the information received from remote slave device will be updated to

the specified internal memory address. For the write command, the data in the

specified internal memory address will be sent to the remote slave device. The

data will be used to update the remote slave device register.

To access this page, click Protocol Setting > Modbus Setting

Start-up Mode Operation Mode

The setting is designated the action of all Modbus TCP/RTU commands at

system start-up stage. Please note that the setting can be selected only

when Status/Control Word is mapped to the PROFINET I/O area respectively.

Otherwise, Running mode is the only option.

Value

Description

Running

The Modbus TCP/RTU master starts to exchange data with

the slaves as soon as possible after start-up.

Idle

The Modbus TCP/RTU master does not exchange any data

with the slaves and waits for instructions via the control

word.

Modbus Commands Table

A detail list of Modbus TCP/RTU commands in the configuration. The Add,

Edit, Delete and Copy buttons support the Modbus command arrangement.

To add a new command or modify the existing one, click the Add button or

Edit button and Modbus command page will appear. To remove Modbus

commands, select the specific command and then click the Delete button.

To copy a Modbus command, select specific command and then click the

Copy button.

Note: The gateway needs to be restarted before any changes will take effect.

4.3 Modbus Command

To communicate with remote Modbus TCP/RTU slave devices, specify the

Modbus command for each slave device. Each slave device may need more than

one command for communication, so you will need to input all the commands

manually.

Parameter

Description

Name

A name to help identify the command.

Mode

The mode of Modbus protocol, TCP or RTU.

TCP: Modbus TCP communication over TCP/IP networking.

RTU: Modbus RTU communication via serial port.

Slave IP Address

The IP address of remote slave device. The field is available only

in TCP mode.

Serial Port

The physical interface to to connect with remote Modbus RTU

devices. The field is available only in RTU mode.

Port

The TCP port number of remote slave devices. The range is from

0 to 65535.

Slave ID

The Modbus slave id that this slave module will accept. The

range is from 1 to 255.

Function Code

When a message is sent from a Master to a Slave device the

function code field tells the slave what kind of action to perform.

Below are the supported function codes:

01: Read coils

02: Read discrete inputs

03: Read holding registers

04: Read input register

05: Write single coil

06: Write single register

15: Write multiple coils

16: Write multiple registers

23: Read/Write multiple registers

Trigger

Cyclic: The read/write command is sent cyclically at the interval

specified in the “Poll Interval” parameter.

Data change: The data area is polled for changes at the time

interval defined by Poll Interval. A write command is issued

when a change in data is detected.

The field is available only in Write function code.

Poll Interval

The polling interval defines how often the Modbus command

shall be resent, e.g. the time cycle of a repeating command. The

range is from 500 to 1,200,000 ms.

Data Swap

Decides in what order the different bytes of the

received/transmitted data shall be sent on the network.

None: Don't need to swap

Word: 0x01, 0x02 becomes 0x02, 0x01

Double Word: 0x01, 0x02, 0x03, 0x04 becomes 0x04, 0x03,

0x02, 0x01

Note:

1) When function code is 1, 2, 5, or 15, None is the only option.

2) When function code is 6, only None and Word are the

options.

3) When function code is 3, 4, 16, or 23, the number of Quantity

must be even.

Read/Write

Starting Address

The starting Modbus register or bit to read from/write to. The

range is from 1 to 65535.

Read/Write

Quantity

Specifying how many quantities to read/write. The range is from

1 to 2000.

Response

Timeout

The time span within which the remote Modbus device must

return a response to the transaction.

When PROFINET

doesn't exchange

I/O

In I/O mapped write transaction, when PROFINET does not

exchange I/O:

Clear data to Modbus server: Transmits only zeros.

Freeze data to Modbus server: Repeat the last stored data.

Write safe value: The value to transmit for each element.

Stop: The transmission of any and all data to the Modbus server

is halted.

Safe Value

The value to transmit for each Modbus server when PROFINET

doesn't exchange I/O.

Note: The gateway needs to be restarted before any changes will take effect.

4.4 Mapping Overview

The gateway provides an internal memory for data exchange between Modbus

TCP/RTU and PROFINET network. After finishing the protocol settings, go to the

Mapping Overview page and check if the data mapping is correct.

The I/O mapped data will always be presented according to the following priority

order:

Input Data

Data from the Modbus TCP/RTU network to the PROFINET network.

Status word (optional)

Exception code (optional)

Input data

Output data

Data from the PROFINET network to the Modbus TCP/RTU network.

Control word (optional)

Output data

PROFINET I/O Table will be mapping to module in Step 7 (TIA Portal)

Index of the Module

Size of the Module in bytes

Size of the Module in words

The read/write capability of the Module

To access this page, click Protocol Setting > Mapping Overview.

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