LTDVE8CH-20 – INSTRUCTION MANUAL
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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 14: default parameters for Ethernet communication
Parameter
Default Value
Host name
LTDVE8CH-20
DHCP
Disabled
IP address
192.168.0.32
Subnet mask
255.255.255.0
Default gateway
192.168.0.1
Preferred DNS server
192.168.0.2
Alternate DNS server
192.168.0.2
Modbus address
32
Modbus/TCP port
502
Modbus/UDP port
502
Table 14: default parameters for Ethernet communication
The IP address, subnet mask and DHCP use flag are some of the controller parameters and can be
changed using any of the available interfaces. The factory configuration uses the static IP address
192.168.0.32. The factory settings can be restored using the INIT button (see
description of the INIT button functionalities).
10. Visual indicators
There are twenty-eight LEDs on the top panel of the controller and two LEDs embedded in the
Ethernet RJ45 jack. Some of them are used to show that power supplies are available, others are
pulsed when inputs and output are activated, while others are used to indicate activity on the
communication interfaces or fault conditions.
The exact meaning of each of the LEDs is listed in
. The LEDs of the
top panel of the controller are identified by a unique label printed next to them. The Ethernet ACT
and LINK LEDs are identified by their position relative to the Ethernet RJ45 jack. The ACT LED is
at the left of the jack, while the LINK LED is at the right.
Number Name Colour
Description
1
PWR
Green Stable when logic supply is present
2
RUN
Green Blinks periodically during normal operation
3
ERR
Red
Stable when power supply missing, blinks in error conditions
4
LD1
Yellow Pulses when light output 1 is activated
5
LD2
Yellow Pulses when light output 2 is activated
6
LD3
Yellow Pulses when light output 3 is activated