Specifications

STB NIP 2311 Services
140
EIO0000000051 6/2010
Modbus TCP/Port 502 Diagnostics
Modbus TCP/Port 502 diagnostic data can be accessed at the following Modbus
register addresses, relative to the initial address offset value:
Address: Offset + Description
0–1 Modbus TCP/port 502 diagnostic data validity
2 port 502 status
3 number of open connections
4–5 number of Modbus messages sent
6–7 number of Modbus messages received
8 number of Modbus open client connections
9 number of Modbus open server connections
10 maximum number of connections
11 maximum number of client connections
12 maximum number of server connections
13–14 number of Modbus exception responses
15 number of open priority connections
16 maximum number of priority connections
17 number of entries in unauthorized table
18–19 remote IP address 1 Table entry 1
20 number of attempts to open unauthorized
connection 1
...
111–112 remote IP address 32 Table entry 32
113 number of attempts to open unauthorized
connection 32