Pyromation T82 - Manual (Page 79)

T82 Operating menu and parameter description
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Options: • Command 1
Read out the primary variable
• Command 2
Read out the current and the main measured value as a percentage
• Command 3
Read out the dynamic HART variables and the current
• Command 9
Read out the dynamic HART variables including the related status
• Command 33
Read out the dynamic HART variables including the related unit
Factory settings Command 2
Additional information Commands 1, 2, 3 and 9 are universal HART commands.
Command 33 is a "Common-Practice" HART command.
More details on this are provided in the HART specifications.
Burst variable slot n
n = Number of burst variable slots (0 to 3)
Navigation Expert ® Communication ® HART configuration ® Burst variable slot n
Prerequisite This parameter can only be selected if the Burst mode option is enabled.
Description Use this function to assign a measured variable to slots 0 to 3.
This assignment is only relevant for the burst mode. The measured variables are assigned to
the 4 HART variables (PV, SV, TV, QV) in the HART output (® ä 82) menu.
Options: • Sensor 1 (measured value)
• Sensor 2 (measured value)
• Device temperature
• Average of the two measured values: 0.5 x (SV1+SV2)
• Difference between sensor 1 and sensor 2: SV1-SV2
• Sensor 1 (backup sensor 2): If sensor 1 fails, the value of sensor 2 automatically becomes the
primary HART ® value (PV): sensor 1 (OR sensor 2)
• Sensor switching: If the value exceeds the configured threshold value T for sensor 1, the
measured value of sensor 2 becomes the primary HART ® value (PV). The system switches back
to sensor 1 when the measured value of sensor 1 is at least 2 K below T: sensor 1 (sensor 2, if
sensor 1 > T)
The threshold value can be set with the Sensor switch set point parameter. With
temperature-dependent switching, it is possible to combine 2 sensors that offer advantages in
different temperature ranges.
Average: 0.5 x (SV1+SV2) with backup (measured value of sensor 1 or sensor 2 in the event of a
sensor error in the other sensor)
Factory settings • Burst variable slot 0: sensor 1
• Burst variable slot 1: device temperature
• Burst variable slot 2: sensor 1
• Burst variable slot 3: sensor 1