Manual – IPOSplus®
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17
Standard functions
Compiler – Functions
For points 1 and 2, note that the unit firmware reserves its own object numbers automat-
ically:
• The object number entered in parameters P885/P895 for SBus synchronization.
• The following object numbers are used for communication via the MOVILINK profile
depending on the SBus address in parameter P881/P891 and the SBus group
address in parameter P882/P892:
– 8 × SBus a 3
for process output data
– 8 × SBus a 4
for process input data
– 8 × SBus a 5
for synchronous process output data
– 8 × SBus a 3 + 512
for parameter request service
– 8 × SBus a 4 + 512
for parameter response service
– 8 × SBus group a 6 for group process data
– 8 × SBus group a 6 + 512
for group parameter request
For communication via the CANopen profile, the object numbers (identifiers) defined in
DS301 by CANopen will be used.
INFORMATION
Observe the following rules when selecting the object number CAN Identifier:
1. In the entire SBus network, an object number can only be set up for transmission
once.
2. Within a unit, an object number may only be set up once; either to be sent or re-
ceived once.
In particular during further data exchange between the slaves, you must ensure that
the total calculated bus utilization does not exceed 70%.
The bus utilization is calculated in bits per second using the formula:
Number of telegrams × bits/telegram × 1/cycle time
For example, 2 messages with 100 bits in 1 ms cycle = 200000 bits/s = 200 kBaud
This results in the following bus load percentage in reference to the selected baud rate.
For example, 200 kBaud / 500 kBaud = 40% < 70%
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