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5.4.9.1 Instance definitions for one-port devices (GW.../1DB9)
Input assembly instances: Input assembly instances are grouped into one continuous
array between the instances. One or more input instances may be read with one I/O
connection. For example, if addressing instance 101, all input instances for both serial and
socket data, 101 and 105, may be read in one connection. The length of the read (input)
connection may range from 1 to the total length for all input instances. Multiple controllers
may access the input assembly instances simultaneously.
Output assembly instances: Output assembly instances are grouped into one continuous
array. One or more output instances may be written to with one connection. The write may
begin at either instance 109 or 113, and the length of the write may range from the length of
the initial output instance or up to the total length of the remaining output instances. For
example, the write may begin at output instance 109 and be the length of output instance
109, or begin at instance 109 with a length of output instances 109 and 113. Only one
controller may access the output assembly instance at a time.
Table 5-35 Assembly object instance attributes
Attribute ID Name Data type Data value Access
rule
3 Data Array of BYTE 0 - 255 Set/Get
4 Data length UINT Maximum number of bytes in attribute 3 Get
Table 5-36 Assembly object common services
Service code Implemented in
class
Implemented in
instance
Service name
01
hex
Yes Yes Get_Attribute_All
0E
hex
Yes Yes Get_Attribute_Single
10
hex
No Yes Set_Attribute_Single
Table 5-37 Input assembly instance attributes
Assembly
instance number
Name Data type Data value Access rule
101 Receive data from serial
port 1
Receive data from socket
port 1
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get
105 Receive data from socket
port 1
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get