Fc Control Profile - Danfoss VLT DeviceNet MCA 104 Programming Manual

Control
Illustration 4.6 Speed Reference Value
The bus speed reference has the following format:
Parameter 3-00 Reference Range = 0 [ref
(0000 hex) [RPM] to + 32767 (7FFF hex) [RPM]
Parameter 3-00 Reference Range = 1 [-ref
-32767 (8001 hex ) to +32767 [RPM] (7FFF hex)
The actual reference [Ref. %] in the frequency converter
depends on the settings in the following parameters:
Parameter 1-23 Motor Frequency
Parameter 1-25 Motor Nominal Speed
Parameter 3-03 Maximum Reference
NOTICE
When the bus speed reference is negative, and the
control word contains a run reverse signal, the frequency
converter runs clockwise (- - is +).
Example:
Parameter 1-25 Motor Nominal Speed = 1420 RPM
Parameter 1-23 Motor Frequency = 50 Hz
Parameter 3-03 Maximum Reference = 1420 RPM
To run the motor at 25%, the reference transmitted must
be: (1420x0.25) = 355 = 16.3 hex
163 hex ⇒ 25% ⇒ F
= 12.5 Hz
out
4.4.4 Actual Output Speed under Instances
20/70 and 21/71
Illustration 4.7 Actual Output Speed Value
The value of the actual speed of the motor, is transmitted
in the form of a 16-bit word.
The value is transmitted as a whole number (negative
figures are formed with 2's complement).
-32767 (8000 hex) [RPM] to +32767 [RPM] (7FFF hex) [RPM]
MG92F102
Programming Guide

4.5 FC Control Profile

4.5.1 Control Word under Instances
To select FC protocol in the control word, set
parameter 8-10 Control Word Profile to [0] FC profile. The
control word is used to send commands from a master
to ref ] 0
(PLC or PC) to a slave (frequency converter).
MIN MAX
to +ref ]
MAX MAX
Illustration 4.8 Control Words in Instances 100, 101, and 102
Bit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Table 4.5 Bits in Instances 100, 101, and 102
Explanation of the control bits:
Bits 00/01
Bits 00 and 01: Select between the 4 reference values,
which are pre-programmed in parameter 3-10 Preset
Reference according to Table 4.6.
Programmed
reference
value
1
2
3
4
Table 4.6 Reference Values
Danfoss A/S © 12/2015 All rights reserved.
100/150, 101/151, and 102/152
Bit value = 0
Reference value
Reference value External selection msb
DC brake
Coasting
Quick stop
Hold output frequency
Ramp stop
No function
No function
Ramp 1
Data invalid
No function
No function
Parameter set-up
Parameter set-up
No function
Parameter Bit 01
3-10 [0] 0
3-10 [1] 0
3-10 [2] 1
3-10 [3] 1
4
Bit value = 1
External selection lsb
Ramp
No coasting
Ramp
Use ramp
Start
Reset
Jog
Ramp 2
Data valid
Relay 01 active
Relay 04 active
Selection lsb
Selection msb
Reverse
Bit 00
0
1
0
1
13
4