108
10. Appendix D: DeviceNet Objects
10.10. I/O Data Input Mapping Object (Class 16#A0)The “I/O Data Input Mapping Object” has only one instance (Instance ID = 16#01) and is specific to the LUFP9
gateway. It contains all the data from the gateway’s unique input area. The only attribute (Attribute ID = 16#01)
of the instance from this object is associated with the “Input1” area. This input area gathers all the memory
locations receiving data from a Modbus response.
Attributes of class 16#A0
ID Access Name Need Type Value Description
16#01 Get Revision Optional UINT 1 Revision index of “I/O Data Input Mapping Object” class.
16#64 Get / Set Input1 offset Optiona l USINT 16#0000 Relative starting a ddress of input area no. 1. (1)
16#6E Get / Set Input1 length Optional USINT 16#0020 Size, expresse d in bytes, of input ar ea no. 1. (1)
(1) These 2 attributes correspond to the “Param6” and “Param7” parameters referenced by the EDS file
supplied with the gateway. Write access to them (Access = Set) is reserved for DeviceNet configuration
tools, since it allows you to change the location or the size of this input data area. So the
“Set_Attribute_Single” service should not be used with these attributes. Changing any one of these two
attributes has direct consequences on the attribute 16#01 of instance 16#01 from the “I/O Data Input
Mapping Object” (size of the data). This attribute is not created if the size of the gateway’s input area is
null. The “Input1 offset” attribute corresponds to an offset from the start of the memory area reserved for
the input data (16#0000).
The values located in the “Value” column correspond to the LUFP9 gateway’s default configuration
(“Input1” area located at address 16#0000 and made up of 32 bytes).
Services in class 16#A0
Service code Name of the service Need Description
16#0E Get_Attribute_Single Required This service allows to read the value of one of the class attributes.
Attributes of instance 16#01 of class 16#A0
ID Access Name Need Type Value
16#01 Get Data Optional USINT […] (input area no.1)
This attribute corresponds to the gateway’s “Input1” area. Reading it gives access to the values of all the data
located in this area in the form of an array of bytes whose size corresponds to the size of the area. This very
same attribute is also involved when using instance 16#64 of the Assembly Objects (Class 16#04) described in
chapter 10.7 (voir page 98).
N.B. With the default configuration, attribute 16#01 corresponds to an array of 32 bytes whose content is
described in chapter 8.2.1 Input Data Memory Area, page 84.
Services of instance 16#01 of class 16#A0
Service code Name of the ser vice Need Description
16#0E Get_Attribute_Single Required This service allows to read the array of values corresponding to the
sole attribute of the single instance from “I/O Data Input Mapping
Object”.