Table of Contents
Advertisement
Configuration
September 2018
Table 2-5. Sensor Transducer Block STB.SENSOR_DETAILED_ STATUS Messages
STB.SENSOR_DETAILED_STATUS
Terminal Temperature Out of Operating
Range
Terminal Temperature Beyond Operating
Limits
Sensor Degraded
Sensor Error
2.5.4
Analog input function block
Status
Along with the measured or calculated PV value, every F
parameter called STATUS. The PV and STATUS are passed from the Transducer Block to the Analog Input
Block. The STATUS can be one of the following: GOOD, BAD, or UNCERTAIN. When there are no
problems detected by the self-diagnostics of the block, the STATUS will be GOOD. If a problem occurs
with the hardware in the device or the quality of the process variable is compromised for some reason,
the STATUS will become either BAD or UNCERTAIN depending upon the nature of the problem. It is
important that the Control Strategy that makes use of the Analog Input Block is configured to monitor
the STATUS and take action where appropriate when the STATUS is no longer GOOD.
Simulation
Simulate replaces the channel value coming from the sensor transducer block. For testing purposes, it is
possible to manually drive the output of the analog input block to a desired value. There are two ways to
do this.
Manual mode
To change only the OUT_VALUE and not the OUT_STATUS of the AI Block, place the TARGET MODE of the
block to MANUAL. Then, change the OUT_VALUE to the desired value.
Simulate
1. If the SIMULATE switch is in the OFF position, move it to the ON position. If the SIMULATE jumper is
already in the ON position, you must move it to off and place it back in the ON position.
Note
As a safety measure, the switch must be reset every time power is interrupted to the device in order to
enable SIMULATE. This prevents a device that is tested on the bench from getting installed in the process
with SIMULATE still active.
2. To change both the OUT_VALUE and OUT_STATUS of the AI Block, set the TARGET MODE to AUTO.
3. Set SIMULATE_ENABLE_DISABLE to 'Active.'
4. Enter the desired SIMULATE_VALUE to change the OUT_VALUE and SIMULATE_STATUS_QUALITY to
change the OUT_STATUS.
If errors occur when performing the above steps, be sure that the SIMULATE jumper has been reset
after powering up the device.
24
Description
PRT readings have gone beyond SECONDARY_VALUE_RANGE
values
PRT readings have gone below 2% of lower range or above 6% of
upper range of PRT. (These ranges are calculated and are not the
actual range of the PRT which is a PT100 A385)
For RTDs, this is excessive EMF detected. This is thermocouple
degradation for thermocouples.
The user trim has failed due to excessive correction or sensor
failure during the trim method
Fieldbus block passes an additional
OUNDATION
Reference Manual
00809-0400-4728, Rev CA
Configuration
Advertisement
Table of Contents
