ADVANCED FUNCTIONS
D485 MODBUS TO DEVICENET CONVERTER – USER GUIDE 8–7
PARAMETER DATA
OUTPUT AREA MAPPING
This command makes it possible to map attributes in the parameter data output mapping
object (class B1h). By mapping data, a Get_Attribute_Single command or a
Set_Attribute_Single command from the DeviceNet master to the parameter data output
mapping object can return a specified block of data or write a block of data. Up to 50
attributes can be mapped. Attributes are mapped with start of attribute 1. The offset is set
from the start of the parameter data output area and length specifies the amount of bytes
to map. Attribute 1 in the mailbox is followed by attribute 2, and continues to attribute 50.
If length is set to zero, the attribute will not exist. As such, it is possible to map only object 1
and 10 by letting the length of attributes 2 through 9 be zero. It is only necessary to include
mailbox information up to the last attribute number.
If any offset or length is invalid, the length and offset will be set to zero in the mailbox
answer and the attribute will not be mapped.
A command and response layout example for setting 1 to 5 attributes is shown below.
Figure 8-6: Command and response layout for parameter output area
Parameter Description
Command initiator Application
Command name
PARAMETER_OUTPUT_MAP
Message type 02h
Command number 0005h
Fragmented No
Extended header data ---
Command data Offset and length of the attributes to map
Response data Indicates if the message was accepted
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