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Installation Manual: GSM Connect – WEG

WIRING AND INSTALLATION MANUAL FOR WEG CFW 500, CFW 700, CFW 11

Package Contents

  • 1 x GSM Connect Modem
  • 1 x Shielded cable
  • 1 x GSM Antenna

Modem Installation

Physical

Disconnect all power

Please ensure that all power to the panel has been disconnected before doing any work on the devices.  Never connect telemetry up while the system is running.

Cable Selection

For RS485 to work effectively, it needs to use a 5 core twisted pair shielded cable.

RS485 Cable Example 

Cable core Usage

Below labels the 4 cables wiring from the GSM connect unit to the power supply and to the Variable Speed Drive (VSD)

PairCoreApplication
ACore 1+12v to 24v DC
ACore 2Ground
BCore 3RS485 A (+)
BCore 4RS485 B (-)
CCore 5Common Ground
ShieldShieldShielded Earth

Table 1 Cable Core Selection

Please ensure that the RS485 data cables are in the same twisted pair. From Figure 1 above either use brown and white or yellow and green.

Note: Cables may vary in colour.

RS485 Serial Settings & Parameters

Single VSD Setup

The GSM Connect comes with the following default parameters programmed. Most WEG VSD units have the parameters below set by default. Please go through

Parameter

Description

Value

P0308

Serial Address

1

P0310

Serial Baud Rate

0 (9600 bits/s)

P0311

Serial Bytes Config

0 (8bits, no, 1)

P0312

Serial Protocol

2 (Modbus RTU)

Table 2 Modbus Serial Settings

Please ensure that your VSD communication settings correctly represent these.

Single VSD and Polar Monitoring RTU module

The GSM Connect modem can be paired with the Polar Monitoring RTU Module to add addition analogue and digital inputs, digital output and pulse counters to the setup.

The Polar Monitoring RTU Module is set at Modbus serial address 1 and because of this it will always need to be installed in position 1 of the communication chain.

This will require a different communication parameter setup as follows.

 Parameter

Description

Value

P0308

Serial Address

2

P0310

Serial Baud Rate

0 (9600 bits/s)

P0311

Serial Bytes Config

0 (8bits, no, 1)

P0312

Serial Protocol

2 (Modbus RTU)

Table 3Modbus Serial Table with RTU

 

 

Multiple VSD Setup with and without RTU

With multiple VSD’s in a chain each VSD in the chain will have to have a different serial address starting at 2 if an RTU is used or starting at 1 if there is no RTU present and increasing the Modbus serial address by 1 for each VSD in the chain.

For example, setups not connected to the RTU module only parameter P0308 will be different on the VSD’s

  • VSD 1 – P0308 = 1
  • VSD 2 – P0308 = 2
  • VSD 3 – P0308 = 3
  • VSD 4 – P0308 = 4

For example, with RTU connected

  • VSD 1 – P0308 = 2
  • VSD 2 – P0308 = 3
  • VSD 3 – P0308 = 4
  • VSD 4 – P0308 = 5

Antenna Placement

The placement of the GSM antenna is crucial to successful operation of the system. The better the signal the more stable & reliable connection the modem will have.

  • The GSM antenna must be mounted outside the enclosure and preferably as high up as possible away from hard surfaces.
  • The GSM antenna cannot be mounted inside of any metal enclosure as this will act as faraday cage and prevent signal from reaching it.
  • The higher up the GSM antenna can be the better chance of finding a stronger signal.
  • Keep vandalism or and physical damage from animas etc. in mind when placing the antenna.

VSD Wiring Instructions

NOTE: The A(-) and B(+) on the WEG VSD. Please follow the “+”PLUS and “–“ (MINUS) signs on the RS485 on the GSM Connect modem and the WEG VSD’s and not the A and B signage.

Connection with RS485

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 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 as far away as 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.

Communication Parameters

Running Parameters

In order to remotely control the drive, one needs to make some small changes to the running parameters on the drive. Please note this is optional.
For the WEG CFW 700 this is parameter P0220

Parameter

Description

Adjustable range

Factory setting

P0304

Skip Speed 2

0 to 18000 rpm

900 rpm

P0305

Skip Speed 3

0 to 18000 rpm

12000 rpm

P0306

Skip Band

0 to 750 rpm

0 rpm

P0308

Serial Address

1 to 247

1

P0310

Serial Baud Rate

0= 9600 bits/s

1= 19200 bits/s

2= 38400 bits/s

3= 57600 bits/s

1

P0311

Serial Byte Configuration

0= 8 bits, no. 1

1= 8 bits, even. 1

2= 8 bits, odd. 1

3= 8 bits, no. 2

4= 8 bits, even. 2

5= 8 bits, odd. 2

1

P0313

Communication Error Action

0= Off

1= Ramp Stop

2= General Disable

3= Goes to LOC

4= LOC Keeping Enabled

5= Causes Fault

1

 

P0314

Serial Watchdog

0.0 to 999.0 s

0.0 s

P0316

Serial Interface Status

0= Off

1= On

2= Watchdog Error

 

P0317

Oriented Start-Up

0= No

1= Yes

0

P0318

Copy Function MMF

0= Off

1= VFD͢͢ →MMF

2= MMF → VFD

3= VFD Synchronization → MMF

4= MMF Format

5= SoftPLC Program Copy

6= SoftPLC Programm Save

0

P0320

FlyStart/ Ride-Through

0= Off

1= Flying Start

2= FS / RT

3= Ride-Through

0

 

Installation

Physical Install

  • Secure both the WEG VSD and the modem into the enclosure.
  • Ensure that the connection screws are tightly fastened.

Connecting the RS 485

  1. Starting with the RS485 connection. (Blue and White Cables)

Twist the length of cable to be used around itself to form a braid to minimize interference in communication. On the top end of the modem Wire the WHITE wire into (A) and the BLUE wire into (B)

On the WEG VSD wire the WHITE wire into position (16) (B+) on the lower terminal block and wire the BLUE wire into position (14)(A-)

Connecting The Power

The modem unit runs on 12-24v DC and will draw this power from the WEG VSD 24v supply.

(Note: do not plug the modem into AC power or a different dc power source)

  1. On the Modem, wire the Red wire into the positive (+) and the BLACK wire into the negative (–) terminals.

2.Then on the WEG VSD wire the RED (+) into Position 9 (+24V) on the Upper terminal block.
Wire the BLACK (–) wire into position 17 (GND) on the Upper terminal block.

VSD Settings & Parameters

The modem is programmed to work with the VSD out of the box, that is if the VSD Communication settings are still default. To double check the communication settings see table below:

Once these parameters have been defaulted, the device stats should start showing up on the portal dashboard.

From the portal one can the reprogram the VSD to allow remote control.

 

P0308

Serial Address

1 to 247

1

P0310

Serial Baud Rate

0= 9600 bits/s

1= 19200 bits/s

2= 38400 bits/s

3= 57600 bits/s

1

P0311

Serial Byte Configuration

0= 8 bits, no. 1

1= 8 bits, even. 1

2= 8 bits, odd. 1

3= 8 bits, no. 2

4= 8 bits, even. 2

5= 8 bits, odd. 2

1

P0312

Serial Protocol

1= TP

2= Modbus RTU

2

Please ensure the following settings are set:

  • P0308 = 1
  • PO310 = 0
  • PO311 = 0
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