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5.20. Slave Communication in Modbus TCP
The "E0 = Ethernet Modbus TCP" option may be used to
access the device using the Modbus TCP protocol.
Access may take place via any client (including the
GF_eXpress set-up), implementing the following Modbus
commands :
• 01 : Read Coils
• 02 : Read Discrete Inputs
• 03 : Read Holding Registers
• 04 : Read Input Registers
• 05 : Write Single Coil
• 06 : Write Single Register
• 15 : Write Multiple Coils
• 16 : Write Multiple registers
In order to connect with the device using the Modbus TCP
protocol via a client, you must assign network parameters,
and specifically:
• IP address (default 192.168.1.50)
• Subnet Mask (default 255.255.255.0)
• Gateway (default 192.168.1.1)
Attribution of these parameters may take place in two ways:
• acting on the parameters in the instrument's ETHER
submenu (enter reference to paragraph "4.24. ETHER
submenu - "Configuration of Ethernet parameters")
• using the "SetIP_850" Set-up Tool run on the PC
As this is a case of a Slave device connected via the
Modbus TCP protocol acting as a bridge, it will also be ne-
cessary to indicate the node number (NodeID) of the device
you want to connect to. The NodeID of the controller with
the optional card is 1.
5.20.1. Setting network parameters using the
tool on a PC
As stated above, network parameters may be assigned
using the set-up tool
"SetIP_850" running on a PC.
When you run this tool, the following dialogue box appears
80209C_MHW_850-1650-1850_01-2020_ENG_pag. 245
1.
list of devices in the Forformance family (850-1650-
1850) with the network option,
2.
button for searching for devices in the Forformance
family (850-1650-1850) with the network option,
3.
selector for the network interface card on the PC to
which the search for devices in the Forformance family
(850-1650-1850) with the network option will be con-
veyed,
4.
network parameters of the device selected in the list
appearing on the left (see point 1)
5.
enabling\disabling assignment of device network para-
meters via DHCP server
6.
button for sending the set network parameters (see
point 4) to the device selected in the list appearing on
the left (see point 1).
Once you have selected the network interface card
of the PC to which you wish to convey the search for
devices in the Forformance family (850-1650-1850)
with the network option (see point 3), press the button
identified in point 2 and the scan will begin). When the
search has been completed, a list of the devices found
will appear in the area on the left (see point 1 and illu-
stration below).
Once you have obtained a list of devices in the Forfor-
mance family (850-1650-1850) with the network option, if
you select one of the items in the list, the corresponding
network parameters will appear in the top right (see illustra-
tion below).
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