14
Firmware version 1.10 - Document version 1.06 - eng
LTDVE1CH-40F | INSTRUCTIONS MANUAL
For the light use a cable as short as possible and with appropriate wire size. Cable reactance limits
performance in pulsed mode, consider to reduce its value by connecting two or more smaller wires
in parallel. For long cables it is recommended to raise the voltage of the illumination. This can be
realized by selecting a light with LEDs connected in series rather than connected in parallel.
9. Communication interfaces
There are several ways to configure the controller.
A first option is to use the serial RS485 interface. To support this interface the controller implements
a subset of the Modbus/RTU (Remote Terminal Unit) slave protocol.
A second option is to use the Ethernet interface. Supported Ethernet speeds are 10 Mbit/s and 100
Mbit/s with auto negotiation. The Ethernet interface allows to configure the controller using the
Modbus/TCP (Transmission Control Protocol) slave protocol, the Modbus/UDP (User Datagram
Protocol) slave protocol or the HTTP (Hyper Text Transfer Protocol) protocol. For supporting the
latter, the controller provides an internal web server accessible by most common web browsers.
The Modbus/RTU, Modbus/TCP and Modbus/UDP protocols are implemented by most
programmable logic controllers (PLCs) with a suitable interface.
The availability of two physical interfaces and four logical protocols makes it easy to integrate the
controller in most vision applications.
for details on operation with both Modbus and web browser.
9.1. Serial RS485 interface
For the serial RS485 interface, the controller implements a subset of the Modbus/RTU slave protocol
and operates, by default, at 9600 bits per second with even parity. The factory set Modbus address
is 32 and it is saved in the controller non-volatile memory.
The Modbus address is one of the controller parameters and can be changed using any of the
available interfaces. The factory set Modbus address can be restored using the INIT button (see
for a description of the INIT button functionalities).
Please note valid Modbus addresses for slave devices are in the range 1 to 247; remaining
addresses are reserved by the standard for special purposes and must not be used. It is of great
importance to ensure, at the time of assigning the slave address, that there are not two devices with
the same address. In such a case, an abnormal behaviour of the whole serial bus can occur, the
master being then in the impossibility to communicate with all the slaves present on the bus.
The activity of the serial RS485 interface is shown by a dedicated yellow LED on the top panel of
the controller.
9.2. Ethernet interface
The Ethernet interface allows to configure the controller using the Modbus/TCP slave protocol, the
Modbus/UDP slave protocol or the HTTP protocol. For the last option, the controller provides an
internal web server accessible by most common web browsers.
To use the interface, connect the controller using a standard Ethernet cable. The default parameters
for the communication are listed in
Table 11: default parameters for Ethernet communication
Parameter
Default Value
Host name
LTDVE1CH-40F
DHCP
Disabled
IP address
192.168.0.32
Subnet mask
255.255.255.0
Default gateway
192.168.0.1
