13.11 Installation → MODBUS client I/O Setup
Signal connectivity status
This icon shows whether the signal can be properly read/written (green), or if the unit responds
unexpected or is not reachable (gray). If a MODBUS exception response is received, the re-
sponse code is displayed. The MODBUS-TCP Exception responses are:
E1: ILLEGAL FUNCTION (0x01) The function code received in the query is not an allowable
action for the server (or slave).
E2: ILLEGAL DATA ADDRESS (0x02) The function code received in the query is not an allow-
able action for the server (or slave), check that the entered signal address corresponds to
the setup of the remote MODBUS server.
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 ei-
ther reading or writing the signal value. When the frequency is set to 0, then modbus re-
quests 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 corre-
sponding 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.
e-Series II-50 Version 3.11
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