Specifications

MCD3000 Series
MG.15.A4.22 - VLT is a registered Danfoss trademark 13
Installation
Message
Fragment Type
ASCII Character String or
(Hexidecimal Character
String)
Write Parameters
Receive Data STX [dddd] [lrc] ETX or
(02h [dddd] [lrc] 03h)
Receive Status STX [ssss] [lrc] ETX or
(02h [ssss] [lrc] 03h)
Parameter Number DC1 [pppp] [lrc] ETX
(011h [pppp] [lrc] 03h)
Parameter Value DC2 [vvvv] [lrc] ETX
(012h [vvvv] [lrc] 03h)
ACK ACK or
(06h)
NAK NAK or
(15h)
ERR BEL
(07h)
nn = two byte ASCII number representing the soft
starter address where each decimal digit is
represented by n.
lrc = two byte longitudinal redundancy check in
hexadecimal.
ccc = three byte ASCII command number where
each character is represented by a c.
dddd = four byte ASCII number representing the
current or temperature data where each
decimal digit is represented by d.
ssss= four byte ASCII number. The first two bytes
are ASCII zero. The last two bytes represent
the nibbles of a single byte of status data in
hexadecimal.
pppp = four byte ASCII number representing the
parameter number where each decimal digit
is represented by p.
vvvv = four byte ASCII number representing the
parameter value where each decimal digit is
represented by v.
■
Serial communications - commands
Commands can be sent to the MCD3000 using the
following format;
Send
Addr es s
ACK
Send
Command
ACK
NAK
Invalid LR
C
Possible error responses
= Master = Slave (MCD3000)
Command ASCII Comment
Start B10 Initiates a start.
Stop B12 Initiates a stop
Reset B14 Resets a trip state
Coast to stop B16 Initiates an immediate
removal of voltage from the
motor. Any soft stop or
D.C.Brake settings are
ignored.
■
Serial communications – status retrieval
Starter status 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)
e Bit No. Receive Data
(ssss)
Requests the configuration status of
the MCD3000.
(Positive logic 1 = true)
Status.0 Unallocated
Status.1 Unallocated
Status.2 Unallocated
Status.3 Positive phase
rotation
Status.4 Soft stopping
Status.5 Unallocated
Status.6 60Hz operation
Status C10
Status.7 50Hz operation
Requests the operational status of
the MCD3000.
(Negative logic 0 = true)
NOT Status._1.0 Power On
NOT Status._1.1 Output On
NOT Status._1.2 Run
NOT Status._1.3 Overload
NOT Status._1.4 Restart delay
NOT Status._1.5 Unallocated
NOT Status._1.6 Unallocated
Status_1 C12
NOT Status._1.7 Unallocated
Version C16 RS485 protocol version number.
Requ st ASCII