Chapter 3 - Web-page overview
13
3-3
Status
This page shows some status information about the Modbus interface. The status
is split into two columns, “Transparent queries” and “Internal queries”. The
Transparent fields shows information about requests that originate from a
ModbusTCP master attached to the protocol converter, and the Internal fields
shows information about requests that originate from either Internal applications
(Log/Alarm) and WebPages.
Number of connections - Indicates the number of open connections to a Modbus
TCP master. Internal queries indicate number of pending queries from WebPages
+ the internal connection from (Alarm/Log) application.
Valid Responses - Counts valid responses from the Modbus/RTU slaves.
Serial Timeouts - The number of time-outs from attached slaves.
CRC Errors - The number of CRC errors on incoming Modbus/RTU responses.
Buffer Overruns - If an incoming Modbus/RTU response is larger than 300 bytes,
this will cause the input buffer to overflow.
Frame Errors - If an incoming Modbus/RTU response has incorrect length or
some other fault in the frame, this will cause a Frame Error.
Exception Responses - Counts all exception responses from the connected
Modbus/RTU slaves.
3-3-1
Modem Status
The modem status field gives information about what state an attached modem is in.
Connecting to Internet - Calling Internet Service Provider and negotiate for a
connection.
Waiting for incoming connection - The unit is waiting for an incoming call.
Waiting for Event/Alarm - The unit is in standby mode, and when an alarm or
event appear it will connect to Internet.
Connection established - A connection to Internet is established and data will be sent.
Incoming connection is in progress - There is an incoming call and correct
baud rate, username and password is being verified.
Modem Dial In/Dial Out disabled - Not possible to connect using the modem.
Summary of Contents for DY-5121
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