The response from the slave to the master will be:
Example - Selection of a data value:
You wish to select kg/hour [20] in parameter 416
Proc-
ess 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]
The response from the slave to the master will be:
Example - Reading a parameter value:
The value in parameter 207
Ramp up time 1
is re-
quired.
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 val-
ue in parameter 207
Ramp-up time 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 pa-
rameter value can only be transferred as a whole
number, a conversion factor must be used to transfer
decimals.
Example:
Parameter 201
Output frequency, low limit f
MIN
has a
conversion factor of 0.1. If you wish to preset the min-
imum 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
1
10
0
1
-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 bits, which always occur in the defined sequence.
PCD 1
PCD 2
Control telegram
(masterslave)
Control word
Reference-
value
Control telegram
(slavemaster)
Status word
Present outp.
frequency
Control Word according to FC protocol
To select
FC protocol
in the control word, parameter
512
Telegram Profile
must be set to
FC protocol
[1].
The control word is used to send commands from a
master (e.g. a PC) to a slave (frequency converter).
MG.27.E2.02 - VLT is a registered Danfoss trademark
115
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