Modbus Device Attributes - ABB COM600S User Manual

1MRS756445
5.3.3.
COM600 series, Version 4.1
Modbus TCP Master (OPC) User's Manual
Name
Received messages
Buffer overflow errors
TCP connect
TCP accept
TCP close

Modbus Device attributes

Table 5.3.3-1 Modbus device attributes
Name
In use
Value or Value range/ Default
Value or Value range/ Default
0 = Out of use
1 = In use
Default: 1
Description
Incremented each time the
Modbus OPC Server receives
a message from the Modbus
channel.
The number of times there has
been a buffer overflow.
Number of TCP connection
requests.
Number of accepted TCP con-
nection requests
Number of TCP connection
close requests
Description
Data type: Integer
Access: No limitations
The operational status of the
device - in use or out of use.
Taking the device out of use
with this attribute stops all data
communication with the device.
All operations that would result
in data exchange are disabled.
The device itself is not affected
by the attribute, only the pro-
tocol stack's image of the
device. Setting IU to 1 is
allowed only if the device
address is legal.
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