13.11 Installation → MODBUS client I/O Setup
E3: ILLEGAL DATA VALUE (0x03) A value contained in the query data field is not an allowable
value for server (or slave), check that the enterd signal value is valid for the specified address
on the remote MODBUS server.
E4: SLAVE DEVICE FAILURE (0x04) An unrecoverable error occurred while the server (or slave)
was attempting to perform the requested action.
E5: ACKNOWLEDGE (0x05) Specialized use in conjunction with programming commands sent to
the remote MODBUS unit.
E6: SLAVE DEVICE BUSY (0x06) Specialized use in conjunction with programming commands
sent to the remote MODBUS unit, the slave (server) is not able to respond now.
Show Advanced Options
This check box shows/hides the advanced options for each signal.
Advanced Options
Update Frequency: This menu can be used to change the update frequency of the signal. This means
the frequency with which requests are sent to the remote MODBUS unit for either reading or
writing the signal value. When the frequency is set to 0, then modbus requests are initiated on
demand using a modbus get signal status, modbus set output register, and modbus set output signal
script functions.
Slave Address: This text field can be used to set a specific slave address for the requests correspond-
ing to a specific signal. The value must be in the range 0-255 both included, and the default is
255. If you change this value, it is recommended to consult the manual of the remote MODBUS
device to verify its functionality when changing slave address.
Reconnect count: Number of times TCP connection was closed, and connected again.
Connection status: TCP connection status.
Response time [ms: ] Time between modbus request sent, and response received - this is updated
only when communication is active.
Modbus packet errors: Number of received packets that contained errors (i.e. invalid lenght, missing
data, TCP socket error).
Timeouts: Number of modbus requests that didn’t get response.
Requests failed: Number of packets that could not be sent due to invalid socket status.
Actual freq.: The average frequency of client (master) signal status updates. This value is recalcu-
lated each time the signal receives a response from the server (or slave).
All counters count up to 65535, and then wrap back to 0.
Version 3.10
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II-53 CB3
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