LEYBOLD DeviceNet ITR 200 D - 2 Object Structure; Connection Object; Vendor-Specific Object Extension on Instance 2 Poll Connection

Connection Object
8
17200138_002_C0 – (2016-10) –
 Leybold
2 Object Structure
2.1 Connection Object
Class Code 05
h
= 05
d
The connection class allocates and manages the internal resources associated
with both I/O and explicit messaging connections. The specific instance generated
by the connection class is referred to as a connection instance or a connection
object.
The following instances of the connection object are supported:
• Instance 1: Explicit Messaging
• Instance 2: I/O-Polling
Please refer to the DeviceNet specification for further information.
2.1.1 Vendor-Specific Object Extension on Instance 2 Poll
Connection
For the selection of the active input assembly the following vendor specific attribute
can be used.
Vendor specific extension:
Attr.
ID
Require-
ment in
implemen
tation
Access
rule
NV/
V
Name DeviceNet
data type
Description of
attribute
Semantics
100 Optional Get/
Set
NV Poll
Produce
Assembly
Instance
USINT Contains the In-
stance number of
the assembly used
by this connection
to send data
1, 2, 4, 5,
8, 9, 10,
12, 13
This vendor-specific attribute facilitates the configuration of the data assembly, sent
by the ITR 200 SD to the DeviceNet Master as Poll response. It offers the possibi-
lity to select a (predefined) data assembly via a configuration tool and the EDS file
→  [5]. Attribute 100 allows the user to configure the Poll I/O Data Assembly via
EDS even when the Poll Connection of the ITR 200 SD is in the established state.
The Assembly Number is stored non volatile. Modifications of the Poll Produce
Assembly Instance will take effect only after a reset of the ITR 200 SD.
Thus, definition of the ITR 200 SD data assembly can be done in two ways:
1. Standard methode (without using attribute 100):
The DeviceNet Master configures the "Produced Connection Path” Attribute of
the Poll connection (Connection Instance 2) when establishing communication
to the ITR 200 SD. This requires a Master to support expanded explicit mes-
saging capabilities.
2. Directly setting Attribute 100 e.g. by a configuration tool
(e.g. RS Networks) + Device Reset.