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5.4.9.2 Instance definitions for two-port devices (GW.../2DB9)
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, 102, 105, and 106, 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 any instance from 109 to 114, 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, 110, 113, and 114. Only
one controller may access the output assembly instance at a time.
Table 5-38 Output assembly instance attributes
Assembly
instance number
Name Data type Data value Access rule
109 Transmit data to serial port
1
Transmit data to socket
port 1
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Set
113 Transmit data to socket
port 1
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Set
Table 5-39 Input assembly instance attributes
Assembly
instance number
Name Data type Data value Access rule
101 Receive data from serial
ports 1 to 2
Receive data from socket
ports 1 to 2
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get
102 Receive data from serial
port 2
Receive data from socket
ports 1 to 2
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get
105 Receive data from socket
ports 1 to 2
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get
106 Receive data from socket
port 2
BYTE array length = (4 +
maximum RX packet size)
0 - 255 Get