13.11 Installation → MODBUS client I/O Setup
Set signal name
Using the on-screen keyboard, the user can give the signal a name. This name is
used when the signal is used in programs.
Signal value
Here, the current value of the signal is shown. For register signals, the value is
expressed as an unsigned integer. For output signals, the desired signal value can
be set using the button. Again, for a register output, the value to write to the unit
must be supplied as an unsigned integer.
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). Status will turn yellow if long
response time prevents reaching frequency selected, or actual frequency is lower
than half of the frequency selected (most likely to happen if sequential mode is
selected, see Advanced Options). If a MODBUS exception response is received, the
response 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 allowable 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 program-
ming commands sent to the remote MODBUS unit.
• E6 SLAVE DEVICE BUSY (0x06): Specialized use in conjunction with pro-
gramming 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.
CB3 II-50 Version 3.4.5
Copyright © 2009–2017 by Universal Robots A/S. All rights reserved.
To Next Page
Loading...
Need help?
General
