Advantech EKI-1242PNMS User manual

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
00
No error
01
Illegal function
02
Illegal data address
03
Illegal data value
04
Slave device failure
05
Acknowledge
06
Slave device busy
08
Memory parity error
0A
Gateway path unavailable
0B
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.