Integrated Bus
ID 442289.06
90
Operation manual POSIDYN® SDS 5000
11
WE
KEEP
THINGS
MOVING
You can use parameter
A138
to analyze events in which several inverters on the IGB-Motionbus are involved.
This parameter indicates the global time (in milliseconds) on the IGB-Motionbus. The value goes from 0 to 2
32
-1 = 4 294 967 295 ms and then begins again at 0. All stations of the IGB-Motionbus work synchronously with
each other and use the inter-device clock. You can use
A138
to trigger Scope pictures in different inverters,
for example, and then use POSITool to relate the pictures to each other timewise.
11.3.5
Exchanging the master position
To exchange the master position via the IGB-Motionbus, you must
•
Send the position of the master to the IGB-Motionbus and
•
Read in the position on the slaves.
WARNING!
Danger of machine malfunction due to an incorrectly reconstructed master reference.
When the master position is distributed over the IGB, the slaves restore the referenced master position
after each startup. This reconstruction is not reliable unless an SSI or EnDat
®
encoder with 4096 multi-
turns is set as the source encoder in parameter
G104
of the master.
The restored master position may not be used with other encoders. New referencing is necessary after
each switch-on.
To send the master position to the IGB-Motionbus, proceed as shown below:
Information
Remember that a positioning application with one of the following synchronous functionalities must
be used on the slaves.
- Electronic cam
- Motion block positioning
- Synchronous command positioning
How to send the master position to the IGB-Motionbus
1. Set parameter
G104
on the master to the source of the master position (e.g.,
X120).
The master position and the related time stamp are indicated in
parameters
E163
or
E164
.
2. Add the parameters
E163
and
E164
to the
IGB-Motionbus Process Mapping
assistant in the
Producer view
of the master.
3. In the
Consumer view
of the slaves, map parameter
E163
on
E102
and
E164
on
E103
.
4. Set parameter
G27
to
6:IGB
on the slaves.
5. Save the parameter assignments in the inverters.
6. Turn the 24-V power supply of the inverters off and on again.
The master position is sent to the IGB-Motionbus and received by the slaves.
Summary of Contents for POSIDYN SDS 5000
Page 194: ...Notes WE KEEP THINGS MOVING ...
