ABB Remote I/O RIO600, Installation And Commissioning Manual

Page: 76 / 312

At power-up, AOM4 channel drives the minimum configured mA
value.
If setting Value Unit is in mA, settings Value Min and Value Max are
not relevant.
6.1.5.1 Calibration
The calibration of the mA output channels and read-back channels is done at the
factory.
6.1.5.2 Output channel supervision
Each output channel is continuously monitored for its health. If an output cable is
damaged, broken or if the connections are open, the IRF LED on the module flashes
a warning and WHMI shows “Ext HW fault”. As a main part of self-supervision, the
module continuously reads back the value driven as an output. If this readback value
deviates by 1% of range with respect to driven value, the IRF LED is steady and
WHMI shows “Supervision fault”.
6.1.5.3 Deadband supervision
Deadband settings are used to select how sensitively AOM4 module operates the
output based on the information received over GOOSE or Modbus communication.
The deadband functionality decides the percentage change in the output value that
needs to be generated at the AOM4 output terminals. If the percentage change
between the newly received value and the last driven value is greater than the set
Deadband Value (in %) of the output range, then the newly received value drives the
output. Otherwise, the last driven value is continued at the output terminals.
Deadband formula:
[ABS (new value – last output driven value) > (% of Deadband value × Output range)]
The output range is the difference between the parameters Output Max value and
Output Min value .
Output range = ABS (Output Max – Output Min)
For example, if Output Min = 0, Output Max = 20, Deadband value = 1% and Last
output value = 10 and if the new received output value is less than 9.8 or greater than
10.2, the new output value should be driven.
Section 6
1MRS757488 H
Commissioning
68 RIO600
Installation and Commissioning Manual