Circutor CVM-A1000 - Page 307

7.5.- MODBUS/TCP BRIDGE COMMUNICATIONS MODULE
The M-CVM-AB-Modbus TCP (Bridge) is a communications module for connecting the CVM-A
devices to a Modbus/TCP network and as an Ethernet to RS-485 gateway.
Modbus/TCP is a communications protocol designed for enabling industrial devices to
communicate with each other on Ethernet networks using TCP/IP protocols.
Basically, Modbus/TCP encapsulates a Modbus frame within a TCP frame, making it possible
to congure and monitor a device via the Internet.
The communications module is also equipped with an RS-485 gateway.
7�5�1�- CONNECTION TERMINALS
Table 145:List of terminals, Modbus TCP ( Bridge ) communications module�
Terminals in the device
1: Ethernet 3: B(-), RS-485
2: A(+), RS-485 4: S, GND for RS-485
1
42 3
Figure 365: Modbus TCP ( Bridge) communications module terminals
7�5�2�- LEDs
Table 146: List of LEDs, Modbus TCP (Bridge) communications module�
LED Status Function
LINK / ACT
On Device connected to the network
Off
Device disconnected from the net-
work
Blinking light Activity on the bus
SPEED
On 100 BT
Off 10 BT
SPEEDLINK/ACT
Figure 366: LEDs Modbus TCP� (Bridge)
307
Instruction Manual
CVM-A1000 - CVM-A1500