GFX4-ETH
ETHERNET MODBUS/TCP SLAVE MODULE
Main characteristics
• Modbus/TCP slave- Modbus RTU Master
• Network address from rotary switches
• Baud rate 10/100Mbit/s settable via
Dip-switch
• Internal installation
Code 80408D_01-2021
PROFILE
The GFX4-ETH module can be installed inside power controller products and expands communication by means of the
Modbus/TCP protocol. The module has two communication channels:
• the first channel is a serial port with Modbus
RTU protocol, and connects a maximum of four power controller devices including the product on which the module is installed, for total of 16 controlled zones (4x4);
• the second channel is a dual ethernet port with a Modbus/TCP slave protocol permitting connection with a Modbus/TCP master.
The node address is assigned by means of the two rotary switches (1...99) on the product that houses the module or by means of a software message.
The network Master (typically a PLC) recognizes the slave node by means of this address.
The slave node recognized by the Master consists of the power controller that houses the module plus the power controller products connected to the Modbus serial port.
The expansion can be installed when the above-mentioned products are ordered or at a later date.
The card has an Ethernet switch with two ports connected to two RJ-45 connectors.
The two connectors are interchangeable for connection of the module to the master
PLC. The presence of the second connector simplifies wiring of multiple devices, permitting “cascade” connection rather than point to point connection via a single switch.
TECHNICAL DATA
Porta ETHERNET
Protocol
Function
Baud rate
Connector
Address
I/O dimensions
Msg. supported
Diagnostics
GREEN led
ON
YELLOW led
ON
Modbus port
Protocol
Function
Baud rate
Connector
General characteristics
Dimensions
Installation
Weight
Power supply
Working/storage temperature
Relative humidity
Ambient conditions of use
Installation
Approvals and certifications
Modbus/TCP (slave)
Connects GFX4/GFXTERMO4 to a Modbus/TCP Master device.
Integrated Ethernet switch.
10/100 Mbit/s, Half/Full Duplex Autosensing
2 x RJ45 CAT5 10/100 BaseT conforming
HW: ID Modbus
SW: MAC Address, IP Address
16 words in Input and 16 words in Output for zone
01, 02, 03, 04, 05, 06, 0f, 10
Error counter to serial link
Packet activity
Link integrity
ModBus RTU (master) RS485 serial
Connects power controller to ModBus RTU network
Autodetected
RJ10 4-4
106x56x17mm (H x L x D)
Inside module
35g
+24V, 3VA max. taken directly from power controller
0...40°C/-20...70°C
20...85% RH non-condensing nternal use, altitude up to 2000m
Inside module (see “INSTRUCTION AND WARNING” manual)
See power controller modules
ELECTRICAL CONNECTIONS
Connectors / LEDs
S5 female connector
S4 female connector
Connector J2
RJ10 4-4 pin
Nr. Pin Name Decription
1 GND1 (**) -
2 Tx/Rx+ Data reception/transmission (A+)
4
3
3 Tx/RxData reception/transmission (B-)
2 1 4 +V (reserved)
Cable type : Flat telephone cable for pin 4-4 conductor 28AWG
-
Note
(**) Connect the GND signal between Modbus devices with a line distance > 100 m.
Connector RJ45 Nr. Pin Name Decription
1 TX+ Data + transmission
2
3
4
TX-
RX+ n.c.
Data - transmission
Data + reception
8
1
7
8
5
6 n.c.
RXn.c.
n.c.
Data - reception
Cable type : Use standard category 6 cable according to TIA/EIA-568A
Note
CONNECTION EXAMPLE
PC/PLC
(Master MODBUS
TCP)
GFX4 / GFXTERMO4 /
GFX4-IR
(Slave MODBUS TCP)
ETH0 ETH1 485
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 1
GFX4 / GFXTERMO4 /
GFX4-IR
(Slave MODBUS TCP)
ETH0 ETH1 485
GFX4 / GFXTERMO4 /
GFX4-IR
(Slave MODBUS TCP)
ETH0 ETH1 485
To other
Ethernet Nodes
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 1
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 1
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 2
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 2
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 2
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 4
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 4
GFX / GFXTERMO4 /
GFX4-IR
(Slave Modbus) Node 4
INSTALLATION NOTE :
To apply to each Ethernet cable a ferrite (cod. 42509, supplied with the board) close to the ETH0 and ETH1 connectors.
SETTINGS REQUIRED TO RESET THE CARD’S DEFAULT VALUES
1. Turn on the instrument
2. Position rotary X10 = C and rotary X1 = 0
3. Wait at least 10 seconds
4. Turn off the instrument
5. Reposition the rotaries at the desired working value, between 1 and 99
6. Turn on the instrument again
CARD CONFIGURATION
The GFX4-ETH card can also be configured using the “Modbus_TCP_card_configurator.exe” software application, available for download on the Gefran web site in the area dedicated to the card.
Serial communication time constraints in Modbus RTU
The following time constraints must be complied with in order to allow correct serial data exchange with the device:
Reading Word/Register parameters: Reading N consecutive parameters, with N from 1 to 16, requires a time of almost
50 ms. In this case the following read and write Modbus command, to the same node, must be sent after this interval time.
Writing Word/Register parameters: Writing N consecutive parameters, with N ranging from 1 to 16, if all values
(maximum 16) on the device are updated, will take a time of:50ms + N x 80ms(*) with N from 1 to 16.
The times reported refer to the case in which the Baudrate of the serial line (parameter bAu Modbus address 45) is
19200.
(*) If STATUS_W parameters (Modbus address 305) are included in the write request and their value is different from the one currently present in the slave, the time required to write each one will be 240ms (instead of 80ms).
ORDER CODE
GFX4 ETH
GEFRAN spa reserves the right to make aesthetic or functional changes at any time and without notice.
GEFRAN spa via Sebina, 74 - 25050 Provaglio d’Iseo (BS)
Tel. 03098881 - fax 0309839063
Internet: http://www.gefran.com
80408D_DTS_GFX4-ETH_01-2021_ENG
