LEYBOLD DeviceNet ITR 200 D - Appendix B: Typical Start-Up Procedure

Start-Up Procedure
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17200138_002_C0 – (2016-10) –  Leybold
Appendix B: Typical Start-Up Procedure
The start up of a device is divided into the steps:
• Allocation process
• Setting of the EPR attribute
• Choice of the input and output assemblies
Send an allocation string as defined in the DeviceNet specification to the device
you want to allocate.
Set the bits in the allocation choice byte to 1 for these connections you want to
use.
Master MAC ID....0
Allocation choice: Explicit, Poll, bit strobe, COS
Slave address: 2
Allocated instances may not be valid for the ITR 200 SD
 Allocation String: 416 00 4B 03 01 57 00
Slave’s explicit/unconnected response message: 413 00 CB 00
Within the first allocation message the explicit connection has to be
established.
The I/O connections bit strobe and COS/Cyclic are not supported by the
ITR 200 SD. Appendix B describes only the general allocation proce-
dure for all devices (group 2 slave only).
After the allocation, the device activates an INACTIVITY WATCHDOG TIMER. This
timer has to be set for every single connection (connection object, attribute 9)
which is allocated in the allocation choice byte. This attribute defaults to 2500
(2500 ms) within explicit messaging connections, and to zero within an I/O con-
nection. If the INACTIVITY WATCHDOG TIMER expires, the established con-
nection will be released. With every message the device receives, this timer is re-
loaded with the value specified in the corresponding connection object, therefore it
normally doesn't expire. The value zero deactivates the INACTIVITY WATCHDOG
TIMER.
In this step the INACTIVITY WATCHDOG TIMER has to be set. In testing mode
you could use the value 0 to deactivate the INACTIVITY WATCHDOG TIMER.
In the following you see the strings for setting the EPR attribute (addresses as
specified above):
ID Message body
414 00 10 05 01 09 00 00 set EPR of the explicit connection to zero
414 00 10 05 02 09 00 00 set EPR of the poll connection to zero
414 00 10 05 03 09 00 00 set EPR of the bit strobe connection to zero
414 00 10 05 04 09 00 00 set EPR of the COS/Cyclic connection to zero
The responses of the slave are:
ID Message body
413 00 90 00 00 set EPR of the explicit connection to zero
Allocation Process
Example of the Principal
Allocation Process
Setting of the EPR Attribute
(Expected Packet Rate)