Specifications

MCD3000 Series
14 MG.15.A4.22 - VLT is a registered Danfoss trademark
Installation
Request ASCII Bit No. Receive Data
(ssss)
T
rip Code C18 Requests the trip status of the
MCD3000.
255= No Trip
0= Shorted SCR trip
1= Excess start time trip
2= Overcurrent trip
3= Motor thermistor trip
4= Phase imbalance trip
5= Supply frequency trip
6= Phase rotation trip
7= Instantaneous overload trip
8= Power circuit fault
9= Undercurrent trip
10= Starter overtemperature trip
■ Serial communications –data retrieval
Data can be retrieved from the MCD3000 using the
following format;
Send
Addr es s
ACK
Send
Request
NAK
Receive
Data
Invalid LR
C
Possible error responses
= Master = Slave (MCD3000)
Request ASCII Receive Data (dddd)
Current D10 Requests motor current. The
data is 4 byte decimal ASCII.
Minimum value 0000, Maximum
value 9999 Amps.
Tempera
ture
D12 Requests the calculated value
of the motor thermal model as
a % of Motor Thermal Capacity.
The data is 4 byte decimal
ASCII. Minimum value 0000%.
Trip point 0105%.
■ Serial communications – downloading
parameter settings from the MCD3000
Parameter settings may be downloaded from the
MCD3000 at any time using the following format;
Send
Addr es s
ACK
Read
Par.
NAK
ACK
Par. No Par. Value
NAK
NAK
ERR
Invalid
LRC
Possible error responses
Invalid parameter
number
Repeat until master sends NAK
= Master = Slave (MCD3000)
Read
Parameters
ASCII Comment
Download
Parameters
P10 Readies MCD3000 to
download parameter values.
■
Serial communications – uploading
parameter settings to the MCD3000
Parameter adjustments may be uploaded to the
MCD3000 only when it is in the off state i.e. not
starting, running, stopping or tripped. Use the
following format to upload parameters;
Send
Addr es s
ACK
Wr i te
Par.
ACK Par . No
Par.
Va l u e
NAK
NAK
ERR
ACK Par . Val ue
NAK
ERR
NAK
ERR
Possible error responses
Invalid
LRC
Invalid
LRC
Unable to program
(motor running)
Invalid Par No. Par. value out
of r ange
Repeat until master sends NAK
Exi t s er ial programming mode
and store parameters to EEPROM
Enter s er ial
progr amming mode
= Master = Slave (MCD3000)
Write
Parameters
ASCII Comment
Upload
Parameters
P12 Readies the MCD3000 for
uploading of parameter
values
When the MCD3000 receives a Upload Parameters
command it enters the Serial Programming mode.
When in the Serial Programming mode the MCD3000
local push buttons and remote inputs are inoperative,
the serial start command is unavailable and MCD3000
numeric display flashes the letters ‘SP’.
When the Upload Parameters command is terminated
by the master or with an error or with a timeout, the
parameters are written to the EEPROM and the
MCD3000 exits the Serial Programming mode.
ATTENTION
The Serial Programming mode will timeout in
500ms if there has been no serial activity.
ATTENTION
The following parameters may not be
adjusted, Par 43, 44, 45, 46 & 49. If values for