Danfoss VLT5000 Protocol

See also: Help for Serial Protocols

 

• Danfoss VLT5000 Protocol
  • Overview
  • CSCAPE Configuration
  • Serial Port Configuration
  • Selecting Device Register
  • Protocol Revisions
  • Block Start
  • Block Size
  • Node Address
  • RAM/EEPROM Parameters
  • Network Communication Errors
  • Device Communication Errors
  • Connection Details

 

Overview

The Danfoss VLT5000 serial downloadable protocol is for communication between the Danfoss inverters and an OCS. This is a Master/Slave protocol.

 

 

CSCAPE Configuration

To configure OCS for the Danfoss protocol, select the Protocol Configuration from the Program menu in CSCAPE software. Select the appropriate protocol type on the desired port. To make sure that the Software is able to configure the equipment for the correct protocol, make sure the Danfoss.dll file is in Protocols directory of the current working/open Cscape.

 

 

Serial Port Configuration

The default settings are 9600 baud, Even parity, Eight data bits, One stop bit, RS485 communication, Multidrop Half duplex, and No handshaking.

 

These settings are intended as a guide and are correct at time of writing. Refer to your VLT5000 documentation for further details and modifications regarding configuring the RS485 Option port on the VLT5000.

 

The VLT5000 RS485 baud rate is specified in parameter 501.

 

 

Selecting Device Register

Enter the desired parameter address in the Device Register field or use " > " button to select the desired parameter.

 

 

 

Protocol Revisions

The Horner APG VLT5000 protocol currently supports read and write of:

EEPROM Parameters : 0–999

RAM Parameters: 0–999

Control Word

Bus Reference

 

 

Block Start

The block start or location is the actual parameter number for EEPROM and RAM Parameters. It should always be set to 0 when accessing the Control Word or Bus Reference.

 

 

Block Size

All register types in the current protocol implementation accesses data as multiples of 32 Bit words.

 

 

Node Address

The RS485 node address for the drive is specified in parameter 500.

 

 

RAM/EEPROM Parameters

Parameter access is either via the current RAM based settings or writing direct to the EEPROM settings to effect changes which will be retained during drive power down.

 

It is important that EEPROM parameters are used only where necessary since EEPROM has a defined number of write cycles.

 

NOTE: Click here for latest Danfoss Parameter List (as of March 10, 2022), and please see the https://www.danfoss.com/en-us/ for updates.

 

 

Network Communication Errors

In order to access the Network statistics, user must assign the “Network status register” in network configuration. The table below gives the details of statistics.

 

Number	Statistics	Location	Description
1	Update interval exceeded count	%Rx	This register explains number of times that the actual transaction scan time to complete all transactions exceeded specified update interval. Generally used as an indicator that an excessive number of triggered transfers or failed communication retries are occurring that is lengthening the expected transaction scan time.   If the Update interval is set to zero (update as fast as possible), this 32-bit register alternately specifies the actual transaction scan time in mSec resolution.
2	No response count	%R(x+2)	This register explains number of times that a device(s) did not respond to a transaction. This includes ALL failed transaction, not just those after the retry count is exceeded.
3	Corrupt Response Count	%R(x+4)	This register explains number of times that a device(s) returned an invalid or failed response to a transaction.  This includes ALL failed.   Transaction, not just those after the retry count is exceeded.
4	Valid Response Count	%R(x+6)	This register explains total number of valid responses.

 

 

NOTE: %Rx: 32-bit network status register configured in Network configuration. For example: %R500(501).

 

 

Device Communication Errors

Error	Error Number	Description
INVALID_BLOCK	-203	Invalid size for data type.
NO_RESPONSE_FROM_PLC	-204	Timeout while waiting for remote node response.
INVALID_RESPONSE_FROM_PLC	-205	Corrupted response from remote node.
INVALID_INITIALISATION	-207	Internal Error - Unable to open port.

 

 

Connection Details

Illustrations below show the various end-of-cable connectors required:

 

25-Pin D-Type Male	10-Pin Weidmuller Cage Clamp	8-Pin RJ 45 Plug	9-Pin DB Male
CN1	CN1	MJ1/MJ2	Port 1

 

 

 

Port 1 — DB9 (Female at OCS end)

MJ1/MJ2 — RJ45 (Female at OCS end)

CN1 — 10-Pin Weidmuller Cage Clamp (Female at OCS end)

CN1 — DB25 (Female at OCS end)

 

NOTES:

• Do not connect to unlisted pins.

• Recommended Cable: Beldon 9503, twisted multipair, screened.

• Connect the screens together at the shield / earth pin of the PLC.