7
vacon • 88
Modbus TCP / Modbus UDP
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
NOTE!
You can read only 25 items with single request. Reading the fault history items is slow.
Reading 25 items at once might take up to three seconds depending on drive type and firmware
versions..
7.4
Modbus communication and connection timeout
It is possible to open up to three connections to the option board. One of the connections could be
used for process data and other just for reading monitoring data. In most cases it is desirable that
if "monitor" connection gets disconnected, no fault is generated but when the connection is
handling the process data, a fault should be generated in the time specified.
This register address enables the user to give custom communication timeout for each connection.
If a custom timeout value is used, it must be given every time a connection is opened. Timeout can
be set only to the connection which is been used to access this register. By default the connection
uses the communication timeout value given via panel parameters.
If the cable is disconnected, a fieldbus fault is activated after the timeout period. When
communication timeout is zero, no fault is activated.
Table 47. Communication timeout register
Table 46. Fault history with time stamps
Holding
register
address
Purpose
Description
40601
Fault Code 1
16 bit fault code in index 1
40602
Sub code 1
16 bit fault sub code in index 1
40603
Time stamp HI 1
32 bit timestamp in seconds high byte in index 1
40604
Time stamp LO 1
32 bit timestamp in seconds low byte in index 1
40605
Time stamp ms 1
Timestamp milliseconds in index 1
40606
Fault Code 2
16 bit fault code in index 2
...
...
...
40801
Time stamp ms 40
Timestamp millisecons in index 40
Holding register
address
Purpose
Description
40501
Communication
timeout
Connection timeout value for this connection in seconds.
Summary of Contents for optea
Page 2: ......
