Danfoss VLT FCM 307 User Manual

VLT
®
FCM Series
Programming
and a byte that gives the address (ADR). Then follows a
number of databytes (variable, depending on telegram
type). The telegram ends with a data control byte (BCC).
Telegram length (LGE)
The telegram length is the number of databytes plus
address byte ADR plus data control byte BCC.
Telegrams with 4 databytes have a length of:
LGE=4+1+1=6bytes
Telegrams with 12 databytes have a length of:
LGE=12+1+1=14bytes
V
LT address (ADR)
Two different address formats are used:
1. Siemens USS protocol address format:
Bit 7 = 0
Bit6isnotused
Bit 5 = 1: Broadcast, address bits (0-4) are not used
Bit 5 = 0: No Broadcast
Bits0-4=VLTaddress1-31
2. Danfoss format:
Bit 7 = 1
Bits 0-6 = VLT address 1-127 (0 = Broadcast)
D
ata control byte (BCC)
The data control byte can best be explained by
means of an example: Before the first sign of the
telegram is received, BCC = 0.
After the first sign has been received:
BCC
NEW
=BCC
OLD
EXOR "first byte"
(EXOR = exclusive-or gate)
BCC
OLD
=00000000
EXOR
"
first byte" = 0 0 0 0 0 0 1 0 (02H)
BCC
NEW
=00000010
Each additional, subsequent byte is gated by
BCC
OLD
EXOR and gives a new BCC
NEW
, e.g.:
BCC
OLD
=00000010
EXOR
"
second byte" = 1 1 0 1 0 1 1 0 (D6H)
BCC
NEW
=11010100
The result after the last received sign is BCC.
■ Databytes
The block of databytes is divided into two
smaller blocks:
1. Parameter bytes used for transferred parameters
between master and slave
2. Process bytes, covering
- Control word and reference value (from
master to slave)
- Status word and present output frequency
(from slave to master)
This structure applies to both the control
telegram (master → slave) and the reply
telegram (slave → master).
There are two types of telegrams:
- with 12 bytes built up as shown above, with
parameter and process block
- with four bytes, which is the process block
from the 12 byte telegram
1
. Parameter bytes
Commands and replies (AK)
Bits no. 12-15 are used for transmitting commands
from master to slave and the slave’s processed
reply back to the master.
Commands master → slave:
MG.03.H3.02 - VLT is a registered Danfoss trademark
79

Danfoss VLT FCM 307 Specifications

General

Brand	Danfoss
Model	VLT FCM 307
Category	DC Drives
Language	English

Summary

Introduction to VLT® FCM Series

Safety Regulations and Warnings

Mandatory safety precautions for handling the FC motor and preventing unintended starts.

Integration and Product Overview

Explains the combined unit design and lists available motor types and ordering information.

Ordering Information

Details flange sizes, mounting options, and ordering forms for the FCM 300 Series.

Installation Guide for VLT® FCM Series

FCM 300 Series Technical Data

Key technical data, electrical specifications, and mounting hardware details for the motor series.

Motor Components and Handling

Details motor parts, safe handling, bearing information, and shaft types.

Physical Installation and Mounting

Covers physical dimensions, mounting types, installation procedures, and alignment requirements.

Maintenance and Protection Systems

Procedures for cleaning, motor maintenance, thermal protection, and cooling options.

Control Panel and Operation

Comprehensive guide to LCP 2, its operation, parameter navigation, and display functions.

Accessories and Options

Details optional accessories like LCP, kits, and potentiometer for enhanced control and operation.

All about FCM 300 Series

Electrical Properties and Isolation

Explains PELV isolation and addresses earth leakage current concerns and RCD usage.

Operating Conditions and Performance

Details performance under overvoltage, noise levels, and motor balancing characteristics.

Derating Factors and Motor Behavior

Covers thermal limits, derating rules for temperature, pressure, speed, and switching frequency.

Environmental and Electrical Standards

Discusses vibration, humidity, efficiency, harmonics, CE labelling, EMC compliance, and environmental considerations.

List of parameters