10. Appendix D: DeviceNet Objects
Attributes of instance 16#01 of class 16#01
ID
Access Name
Need
Type
Value
16#01 | Get | Vendor ID | Required | UINT | 90 |
| All vendor IDs for DeviceNet products are managed by the ODVA. With the LUFP9 gateway, this ID is set to 90 | ||||
| (gateways from HMS Fieldbus Systems AB (Hassbjer Micro Sys) ). |
|
| ||
16#02 | Get | Device type | Required | UINT | 12 |
The list of the various types of DeviceNet products is managed by the ODVA. This attribute allows a DeviceNet subscriber’s profile to be identified, and the minimum requirements and options commonly used by the subscribers in this profile to be deduced. The LUFP9 gateway is a “Communication Adapter” product (see chapter
16#03
Get | Product code | Required | UINT | 60 |
This attribute is managed by the manufacturer of the product, thus allowing him to characterize his own products. He uses it to identify each of his products within the same product family (“device type” attribute). This allows products with differences in terms of their configurations and/or their options to be characterized.
16#04
Get | Revision | Required | USINT, USINT | 3 , 1 |
Major and minor indices allowing the “Identity Object” to be identified. The value of each of the two members of this attribute may not be null. The conventional representation of the revision indices is “major.minor”, with 3 digits for the minor index, completed to the left by zeros if necessary. The major index is limited to 7 data bits. Its 8th bit is reserved and should be set to zero.
16#05
Get | Status | Required | WORD |
This attribute is a summary of the product’s general status. This is a
Bit 0 | Allocated to a master | Bit 8 | Minor recoverable fault. |
| (predefined master/slave connection set). | Bit 9 | Minor unrecoverable fault. |
Bit 1 | Reserved (value = 2#0). | Bit 10 | Major recoverable fault. |
Bit 2 | Configured product. | Bit 11 | Major unrecoverable fault. |
Bits | Reserved (value = 2#00000). | Bits | Reserved (value = 2#0000). |
16#06
Get | Serial number | Required | UDINT | (variable) |
The product’s serial number is combined with the “vendor ID” attribute to produce a unique identifier for each DeviceNet product. Each manufacturer must take responsibility for guaranteeing that all the DeviceNet products he manufactures have a unique serial number.
Sample “serial number:” 16# 23 00 DD 20.
16#07
Get | Product name | Required | SHORT_STRING |
This attribute gives visual identification method and takes the form of an ASCII string. This text gives a short description of the product, or the product family, equivalent to the “product code” attribute (16#03).
The byte preceding this ASCII string shows the total length of this string, from first to the last character. With the LUFP9 gateway, the total number of bytes included in the “product name” attribute is set to 24. The “Anybus- C DeviceNet” string has 18 characters (including spaces). The whole content of the “product name” attribute, with the LUFP9 gateway, is therefore equal to: 16# 12 41 6E 79 62 75 73 2D 43 20 44 65 76 69 63 65 4E 65 74 00 00 00 00 00. The bytes which are not shown in bold are the content of the ASCII string (length = 16#12).
16#09
Get | Configuration consistency value | Optional | UINT | (variable) |
The value of this attribute allows the validity of the product’s configuration to be checked. The product automatically updates this attribute when the value of any
So this attribute allows a DeviceNet master, for instance, to check that the configuration of the DeviceNet product has not been changed.
N.B. In addition to calculating the value of this attribute, the LUFP9 gateway uses its LED s DEVICE STATUS to warn the user when its configuration is not valid (the LED flashes red/green).
Services of instance 16#01 of class 16#01
Service code | Name of the service | Requirement | Description |
16#05 | Reset | Required | This service allows to restart the gateway (power cycle). |
16#0E | Get_Attribute_Single | Required | This service allows to read the value of one of the instance attributes. |
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