Danfoss VLT FCD 322 User Manual

VLT
®
FCD Series
Programming, FCD
300
Example - Write a parameter value:
Parameter 202 Output frequenc y hig h limit, f
MAX
to
be changed to 100 Hz. The value must be recalled
after a mains failure, so it is written in EEPROM.
PKE = E0CA Hex - Write for parameter 202
Output frequency high limit, f
MAX
IND = 0000 Hex
PWE
HIGH
= 0000 Hex
PWE
LOW
= 03E8 Hex - Data value 1000,
corresponding to 100 Hz, see conversion.
Theresponsefromtheslavetothemasterwillbe:
Example - Selection of a data value:
You wish to select kg/hour [20] in parameter 416
Process units. The value must be recalled after a
mains failure, so it is written in EEPROM.
PKE = E19F Hex - Write for parameter
416 Process units
IND = 0000 Hex
PWE
HIGH
= 0000 Hex
PWE
LOW
= 0014 Hex - Select data option
kg/hour [20]
Theresponsefromtheslavetothemasterwillbe:
Example - Reading a parameter value:
The value in parameter 207 Ramp up time 1 is required.
The master sends the following request:
PKE = 10CF Hex - read parameter 207
Ramp up time 1
IND = 0000 Hex
PWE
HIGH
= 0000 Hex
PWE
LOW
= 0000 Hex
If the value in parameter 207 Ramp-up t ime 1 is 10
sec., the response from the slave to the master will be:
Conversion:
Under the section entitled Factory Settings the
various attributes of each parameter are displayed.
As a parameter value can only be transferred
as a whole number, a conversion factor must
be used to transfer decimals.
E
xample:
Parameter 201 Output frequency, low limit f
MIN
has
a conversion factor of 0.1. If you wish to preset the
minimum frequency to 10 Hz, the value 100 must
be transferred, as a conversion factor of 0.1 means
that the value transferred is multiplied by 0.1. The
value 100 will thus be perceived as 10.0.
Conversion table
Conversion
index
Conversion
factor
73 0.1
2 100
110
01
-1 0.1
-2 0.01
-3 0.001
-4 0.0001
-5 0.00001
■ Process Words
The block of process words is divided into two blocks
of 16 bi
ts, which always occur in the defined sequence.
PCD 1 PCD 2
Control telegram
(master⇒slave)
Control word Reference-
value
Control telegram
(slave⇒master)
Status word Present outp.
frequency
MG.04.B7.02 - VLT is a registered Danfoss trademark
81

Danfoss VLT FCD 322 Specifications

General

Brand	Danfoss
Model	VLT FCD 322
Category	DC Drives
Language	English