Terminating Resistor; Indications; Connection With The Rs485 Network; Usb Communication Module (Cfw100-Cusb) - WEG CFW100 User Manual

2.1.3

Terminating resistor

It is necessary to enable a terminating resistor at both ends of the main bus for each segment of the RS485
network. If the equipment located at both ends of the bus does not have termination resistors, use active
terminating to enable these resistors.
2.1.4

Indications

Details on the alarms, communications failures and communication states are made through the keypad (HMI)
and product parameters.
2.1.5

Connection with the RS485 Network

The following points must be observed for the connection of the device using the RS485 interface:
It is recommended the use of a shielded cable with a twisted pair of wires.

It is also recommended that the cable has one more wire for the connection of the reference signal (GND).

In case the cable does not have the additional wire, then the GND signal must be left disconnected.
The cable must be laid separately (and far away if possible) from the power cables.

All the network devices must be properly grounded, preferably at the same ground connection. The cable

shield must also be grounded.
Enable the termination resistors only at two points, at the extremes of the main bus, even if there are

derivations from the bus.
2.2

USB COMMUNICATION MODULE (CFW100-CUSB)

For this module, a USB interface with mini-USB conector is available. When connecting the USB interface, it will
be recognized as a USB to serial converter, and a virtual COM port will be created
made with the drive via this COM port.
The USB accessory also provides the connection to the remote keypad via standard RS485 interface.
2.2.1 Indications
Details on the alarms, communications failures and communication states are made through the keypad (HMI)
and product parameters.
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It is necessary to install the USB driver on the CD-ROM supplied with the product. The COM port number created depends on the
availability in the operating system and, once connected, consult the hardware resources of the system to identify this port. .
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
Figure 2.2: Module with USB connection
Interface Description
. Thus communication is
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