iSMA-B-AAC20/Sedona Modbus
Version 1.3
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Fast Rate
–
Time between me
ssages in „Fast” mode poll
frequency,
Normal Rate
–
Time between me
ssages in „Normal” mode poll frequency,
Slow Rate
–
Time between me
ssages in „Slow” mode poll frequency,
Average Poll Time
–
Average time for sending/receiving one message,
Busy Time
–
Percentage of Modbus network usage,
Total Polls
–
Total number of messages,
Fast Polls
–
Number of me
ssages in sending „Fast” mode
,
Normal Polls
–
Number of me
ssages in sending „Normal” mode
,
Slow Polls
–
Number of me
ssages in sending „Slow” mode
,
Timeouts
–
Number of lost messages, difference between sending and receiving messages,
Errors
–
Number of error messages (for example with wrong CRC)
Free points
–
Number of available physical points in Modbus Network.
5.3
Modbus TCP Device
ModbusDeviece is a component which is responsible for servicing physical Modbus TCP slave
devices. Each Modbus device is represented by an IP address, port number (default for
Modbus 502) and Device address (1 to 247).
The component has Ping action available under the right mouse button, which sends test
message to device to check device status.
Each ModbusDevice has a “Ping Address” container
slot with 3 properties slots (Address Format, Ping Address Reg, Ping Type). These properties
specify a particular data address (either input register or holding register) to use as the device
status test (meaning “Monitor” ping requests). Ping requests are generated at the network
-
level by the configurable network monitor (ModbusNetwork -> Ping Enabled). When enabled,
a network’s monitor periodically pings (queries) this add
ress. While receiving Any response
from the device, including an exception response, this is considered proof of communication,
and the Modbus client device is no longer considered “down” if it had been previously marked
“down”. The
component has Ping action available under the right mouse button, with sends
test message to device to check device status.