Software Configuration
Chapter 4
10/11/18
Bedrock Secure OSA Remote User Manual - BRDOC020_001
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I/O Update Rate
The I/O update rate for the OSA Remote can be as fast as 3 milliseconds. It is
configured by setting the task interval in the Bedrock IDE.
Over Range Detection
If the analog input or output circuitry detects out of range values, it sets the
corresponding flags and clamps the values. See Table 4-5. These values are visible
in the Bedrock IDE.
Fail-safe Output Feature
The OSA Remote has a fail-safe output feature that protects the module in the
event of communication failure between the I/O subsystem and CPU. If no
communication is received from the CPU within the configured fail-safe
timeout period and the fail-safe mode configuration parameter is set to
“Fail-safe”, the output for each channel will be set to either a configured fail-safe
value or held at the current level.
Table 4-4 A/D Sampling Rates and Resolutions
Sampling Rate (SPS)
at 50 Hz Line
Frequency
Sampling Rate (SPS)
at 60 Hz Line
Frequency
Resolution in Bits
8
10
18
12
15
18
25
30
18
50
60
17
100
120
17
Table 4-5 Over Range Flags
Value
Type
Value
Channel Status Value
Input
clamped at 3.5 mA
0x0040
64 (decimal)
Input
clamped at 24.0 mA
0x0010
16 (decimal)
If the input exceeds 24.9 mA, bit 2 will also
be set, indicating that the ADC has become
saturated. In this case, the status value will
be as follows:
0x0014
20 (decimal)
Output
clamped at 3.0 mA
0x0044
68 (decimal)
Output
clamped at 24.0 mA
0x0014
20 (decimal)
