Positioning module IMD20, IMD40
CanOpen protocol
Relation between Baud rate and wire length of CAN bus:
Baud Rate (kBit/s)
20 50 125
250
500
1000
Wi
ng
2500
00
100
5
re le
th (m)
1000 5
250
2
aximum jerk
Name
Type
Attrib Map Default
value
Meaning
M
Index Sub
2040
00
Max. jerk
Unsigned 32
RW
N
10000000
Max. jerk in user-defined
unit / s³.
The maximum jerk limits the vibration behaviour of the mechanical axis. The jerk value can be read in
and used by the CNC control. Within the final power stage, this parameter is not used. The CNC
control of ISEL uses this parameter. The smaller the jerk value, the better the vibration behaviour of
the axis. The acceleration or braking process, however, takes longer accordingly.
Axis type
Index Sub Name
Type
Attrib Map Default
value
Meaning
2041
00
Axis type
Unsigned 8
RW
N
0
0
Linear axis.
1 Rotary
axis.
The CNC control of ISEL uses this parameter for the display. Otherwise, this parameter does not
have any particular application purpose.
Password
Index Sub Name
Type
Attrib Map Default
value
Meaning
2042
Password
RECORD
Change
of
password
2042
00
Number of entries
Unsigned 8
CONST
N
3
Number of Entries.
2042
01
Current password
Unsigned 32
WO
N
Current password
2042
02
Modification mode
Unsigned 8
RO
N
0
Æ
Wrong password
1
Æ
Correct password
2042
03
New password
Unsigned 32
WO
N
New password
The “Password” object offers the possibility to protect the set parameters from unauthorised changes. It
has to be taken into account that the protection mechanism does not work on the IMD20, IMD40 level. An
application software has to use the possibilities offered by this object in order to protect the parameters
within the IMD20, IMD40 module.
During the initialisation phase, the “Modification mode” parameter is always set to 0. The writing of the
“Current password” parameter with the correct password sets the “Modification mode” parameter to 1. In
this case, a new password can be defined via the "New password" parameter. A wrong password sets
back the "Modification mode” parameter to 0. The setting of a new password is thus prohibited. Apart from
the setting of a new password, an application software can control by means of the “Modification mode”
parameter, if the password entered is correct or not, and respond accordingly. After a firmware update via
the bootstrap loader, the module always has the default password “ISEL”.
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