Danfoss MCO 305 Design Manual page 221

MCO 305 Design Guide
33-16 Marker Number for Slave
SYNCMARKS
Range
1 – 10000
Function
The Marker Number for Master (par. 33-15) and
Slave must be set according to the ratio between
the number of marker signals from master and
slave.
A ration of 1:1 means that each slave marker will
be aligned with each master marker. A ratio of 2:1
means that each slave marker will be aligned with
each second master marker.
Example
The master marker is an external signal which
reports when a transport article arrives; the corres-
ponding slave marker is the index impulse of the
motor. If the motor always requires 3 rotations
until the article arrives, then this means that
3 index impulses must elapse before a marker
comes. Thus, this results in a ratio of 3:1; only
rd
every 3 slave pulse is evaluated.
33-17 Master Marker Distance
SYNCMPULSM
Range [Unit]
0 – MLONG
[qc] or in CAM mode [MU]
Function
The Master Marker Distance indicates how many qc
(master) lie between two master markers or in
CAM-Mode the distance between sensor and wor-
king position.
If you use the encoder index impulse as a marker
signal, then the distance between two markers is
the resolution (qc) of the encoder.
If external marker signals are used, then it is pos-
sible to measure the marker distance with the pro-
gram "marker count" (refer to sample program), if
it is unknown.
Master Marker Distance is only valid for synchroni-
zation with marker correction (SYNCM and
SYNCCMM).
default setting
__ Parameter Reference __
1
4096
[ ] value for use in communication via serial communication port
®
MG.33.L5.02 – VLT is a registered Danfoss trademark
In a CAM synchronization, the distance of the sen-
sor to the working position in MU will be indicated
instead of the distance between two master mar-
kers. (The distance is brought about automatically
by the master cycle length (Mt).)
If the parameter is larger than one master cycle
length (Mt), a marker-FIFO register will be created
automatically for he marker correction handling.
33-18 Slave Marker Distance
SYNCMPULSS
Range [Unit]
0 – MLONG
[qc] or in CAM mode [UU]
Function
The Slave Marker Distance defines how many qc
(slave) lie between two markers (slave) or in CAM-
Mode the distance of the sensor to the working
position in UU.
Slave Marker Distance is only valid for synchroniza-
tion with slave marker correction (SYNCM and
SYNCCMS).
33-19 Master Marker Type
SYNCMTYPM
Option
Encoder Z positive flank
Encoder Z negative flank
External marker positive flank
External marker negative flank
Function
Defines the signal type for the master marker:
index pulse of the encoder or external marker.
Master Marker Type is only valid for synchroniza-
tions with marker correction (SYNCM and
SYNCCMM) or if the command MIPOS should be
used in the program.
An extended marker type realizes a logical AND for
marker input and a second input, e.g. to synchro-
nize every second marker with a PLC control. This
also influences the command MIPOS. MIPOS only
delivers a new value, if the condition is true.
External master marker signal: Input 5.
4096
[0]
[1]
[2]
[3]
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