Danfoss VLT 2800 Design Manual page 124

Programming
Gives the calculated/estimated thermal load on the
adjustable frequency drive. 100% is the cut-out limit.
Parameter 528 Digital input:
Gives the signal status from the 5 digital inputs (18, 19, 27,
29 and 33). Input 18 corresponds to the bit on the extreme
left. '0' = no signal, '1' = connected signal.
Parameter 529 Terminal 53 analogue input [V]:
Gives the voltage value for the signal on terminal 53.
4 4
Parameter 531 Terminal 60 analogue input [mA]:
Gives the present value for the signal on terminal 60.
Parameter 532 Pulse reference [Hz]:
Gives a pulse frequency in Hz connected to terminal 33.
Parameter 533 External reference:
Gives the sum of external references as a percentage (sum
of analog/pulse/serial communication) in the range from
minimum reference, Ref
Parameter 534 Status word:
Gives the present status word for the adjustable frequency
drive in hex. See chapter 4.7 Serial communication for more
details.
Parameter 535 Bus feedback 1:
Allows writing of a bus feedback value which then forms
part of the feedback handling.
Parameter 537 Inverter temperature:
Gives the present inverter temperature on the adjustable
frequency drive. The cut-out limit is 90-100 °C, with cut
back in at 70 °C±5 °C.
Parameter 538 Alarm word:
Shows the active alarm on the adjustable frequency drive
in hex code. See chapter 5.2.3 Warning Words, Extended
Status Words and Alarm Words for more details.
Parameter 539 Control word:
Gives the present control word on the adjustable
frequency drive in Hex. See chapter 4.7 Serial communi-
cation for more details.
Parameter 540 Warning word:
States whether there is a warning on the adjustable
frequency drive in hex. See chapter 5.2.3 Warning Words,
Extended Status Words and Alarm Words for more details.
Parameter 541 Extended status word:
States whether there is a warning on the adjustable
frequency drive in hex code. See chapter 5.2.3 Warning
Words, Extended Status Words and Alarm Words for more
details.
Parameter 544 Pulse count:
This parameter can be read out via the LCP display
(parameters 009-012). When counter stop is enabled, use
this parameter, either with or without reset, to read the
number of pulses registered by the device. The highest
frequency is 67.6 kHz, while the lowest is 5 Hz. The
counter is reset when counter stop is restarted.
122
Design Guide
to maximum reference, Ref
MIN
Danfoss A/S © Rev. May/2014 All rights reserved.
NOTICE
Parameters 515-541 can only be read out via an LCP
control unit.
560 N2 Override release time
Value:
1 - 65534 (OFF) s
Function:
In this parameter, the maximum time is set which is
expected to pass between the receipt of 2 N2 telegrams in
a row. If this time is exceeded, the serial communication is
assumed to have stopped and all points in the N2 point-
map which are overridden are released in the order below:
1. Release analog outputs from point address (NPA)
.
MAX
0 to 255.
2. Release binary outputs from point address (NPA)
0 to 255.
3. Release internal floating points from point
address (NPA) 0 to 255.
4. Release internal integer points from point address
(NPA) 0 to 255.
5. Release internal byte points from point address
(NPA) 0 to 255.
Description of choice:
Set the required time.
561 Protocol
Value:
FC protocol (FC PROTOKOL)
Metasys N2 (METASYS N2)
Modbus RTU
Function:
Select between 3 different protocols.
Description of choice:
Select the required control word protocol.
For further information about using the Metasys N2
Protocol, see Metasys N2 Manual. For further information
about using Modbus RTU, see Modbus RTU Manual.
570 Modbus parity and message framing
Value:
(EVEN/1 STOPBIT)
(ODD/1 STOPBIT)
(NO PARITY/1 STOPBIT)
(NO PARITY/2 STOPBIT)
Function:
This parameter sets up the frequency converter's Modbus
RTU interface to communicate properly with the master
controller. Set the parity (EVEN, ODD, or NO PARITY) to
match the setting of the master controller.
OFF
[0]
[1]
[2]
[0]
[1]
[2]
[3]
MG27E402