Danfoss VLT Flow Drive FC 111 - 8.4.13 Process Words (PCD); 8.5 Examples; 8.5.1 Writing a Parameter Value; 8.5.2 Reading a Parameter Value

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Conversion index
Conversion factor
-5
0.00001
8.4.13 Process Words (PCD)
The block of process words is divided into 2 blocks of 16 bits, which always occur in the defined sequence.
Table 58: Process Words (PCD)
PCD 1
PCD 2
Control telegram (master->follower control word)
Reference value
Control telegram (follower->master) status word
Present output frequency
8.5 Examples
8.5.1 Writing a Parameter Value
Change parameter 4-14 Motor Speed High Limit [Hz] to 100 Hz.
Write the data in EEPROM.
PKE = E19E hex - Write single word in parameter 4-14 Motor Speed High Limit [Hz]:
IND = 0000 hex.
PWE
HIGH
= 0000 hex.
PWE
LOW
= 03E8 hex.
Data value 1000, corresponding to 100 Hz, see
8.4.12 Conversion.
The telegram looks like the following illustration.
e30ba092.10
E19E
0000 0000 03E8
H H H H
PKE
IND
PWEPWE
high low
Illustration 73: Telegram
N O T I C E
Parameter 4-14 Motor Speed High Limit [Hz] is a single word, and the parameter command for write in EEPROM is E. Parameter 4-14
Motor Speed High Limit [Hz] is 19E in hexadecimal.
The response from the follower to the master is shown in the following illustration.
e30ba093.10
119E
0000 0000 03E8
H H H H
PKE
IND
PWEPWE
high low
Illustration 74: Response from Master
8.5.2 Reading a Parameter Value
Read the value in parameter 3-41 Ramp 1 Ramp Up Time.
PKE = 1155 hex - Read parameter value in parameter 3-41 Ramp 1 Ramp Up Time:
IND = 0000 hex.
PWE
HIGH
= 0000 hex.
PWE
LOW
= 0000 hex.
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RS485 Installation and Set-up
VLT® Flow Drive FC 111
Design Guide