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9 Communication
9.2 Modbus
9.2.8
Modbus TCP Diagnosis
The diagnostics function for Modbus TCP, see chapter 7.5.5.1, enables analyzing the parameters and the com-
munication and resetting diagnostics counters.
Fig. 9-3
All diagnosis counters are signless 32-bit values (counting maximum: 4 294 967 295).
The diagnosis counters are set to 0 under the following conditions:
•
Device restart
•
Clicking Clear counters in the input/output window
•
Activating communication via Modbus TCP during parameterization
Parameter for Standard Server and User-port Server
•
Port number:
•
Number of connections:
•
Used connections:
•
Connection overflow:
188
Modbus TCP Diagnosis
Standard port 502 and configured user port
For user port number 502: 4 connections via standard port
502
For other user port numbers: 2 connections via standard port
502 and 2 connections via the user port
Number of connections that are actually used
Counter of the attempts to establish more connections than
allowed;
Number of allowed connection attempts:
For user port number 502: ≥ 5 connection attempts via stan-
dard port 502
For other user port numbers: ≥ 3 connection attempts via
standard port 502 and/or ≥ 3 connection attempts via user
port
SICAM MMU 7KG9663, Device Manual
E50417-H1040-C514-A3, Edition 01.2016
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