INFICON HPG400-SD ATM to Ultra-High Vacuum Gauge (DeviceNet) - Manual (Page 31)

tira03e1-b (0310) BPG/HPG400-SDv1.cp
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Master MAC ID....0
Allocation choice:
Explicit, Poll, bit strobe, COS
Slave address: 2
Allocated instances may not be valid for the BPG400-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
BPG400-SD. Appendix D 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
connection. 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 according connection object, therefore it nor-
mally 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
You can specify which of the several input/output assemblies predefined in a de-
vice should be used for every single connection.
Reading or setting of the input/output assemblies is possible only if the
corresponding connection (polling, change of state, bit strobe) has been
allocated in the Allocation Message.
If you want to read the number of the chosen assembly, you must read the attrib-
utes 14 and 16 in the corresponding Instance of the Connection Object (Object
ID 5).
For reading this value, the connection has to be established. The EPR attribute
may be set.
Instance 2: Polling
Instance 3: Bit Strobe
Instance 4: Change of State/Cyclic
Example of the principal
allocation process.
Setting of the EPR Attribute
(expected packet rate)
Choice of the input and output
assemblies
Reading the configured
Assemblies