Chapter 3: Configuring the 2085-IF4XOF4-SC Using CCW
3-31
User’s Manual Pub. 0300307-01 Rev. A
If any following communication fault happens from either the Outputs or the
Inputs, a global fault is triggered to the controller level, and all outputs will be
disabled, and all inputs will stop reporting input data to the controller.
Output DAC Communications
It is not possible to detect communications errors with the DAC since there is no
transmit line coming from the device for feedback. In cases where
communications are lost with the DAC, there can be three possible outcomes:
•
Outputs may remain in their previous state.
•
Outputs may be full-scale.
•
Outputs may be minimum scale (depending on range).
Output Driver Communications
Since the module MCU can read from the Output Drivers, communications errors
can be detected, and a hardware fault can be set.
Input ADC and PGA Communications
Communications errors can be detected, and a hardware fault can be set. The
approaches to ensure valid communications available:
•
For PGA: Read the GPIO register of the hardware pre-soldered GPIO pin
connection for indexing. This should return constant address number.
•
ADC reads the data register for getting ADC counts. After settling input
ADC, if the ADC stays in data-not-ready status for 1.5 seconds, stale
data will be reported. After the timeout, the channel fault will be set as
hardware communication fault.
Module Error
The module notifies the host PLC of critical and non-critical errors. The
Micro850 or Micro870 PLCs can generate a series of 0
x
F2
xy
errors specifically
for the installed module. If any of the following faults occur, refer to the
Configuration table to use appropriate values:
3.10.1
Module Specific Hardware Errors
If you attempt to trigger or cause a hardware error, the CCW software generates a
high-level hardware fault with an extended code for details. The connection
status is faulted and disconnected. The follow table contains some examples of
module-specific hardware faults that can be detected and shown in CCW:
Fault Code Extended Fault Code Error Description
0×F29z
0×301
Not used
0×302
Not used
0×303
Output driver over temperature
17
z indicates the slot number of the expansion I/O. If z=0, then the slot number cannot be identified
Summary of Contents for 2085-IF4XOF4-SC
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