KROHNE IFC 010 Converter HART - Manual (Page 26)

HARTÆ Communications Protocol
IFC010 Command Specification Rev: 1.0 Release Date: 29 May 1997
© 1997 KROHNE Mefltechnik D-47058 Duisburg Page 26
0 No Command-Specific Errors
1-4 Undefined
5 Too Few Data Bytes Received
6-7 Undefined
8 Update Failure
9-14 Undefined
15 Wrong Password
16-127 Undefined
8.20 Command #151 Control Zero Calibration
Unlike Command #43, Set Primary Variable Zero, where an instant measurement is used to correct zero point, this
command performs calibration exactly as if this process was activated via device keypad (Menu 3.3): 255 subsequent
measurements are averaged before zero correction is done. The process lasts 3.5-5.5 sec (best and worse cases).
REQUEST DATA BYTES
#0
CAL
CONTROL
VAR
RESPONSE DATA BYTES
#0 #1
CAL CAL
CONTROL STATUS
VAR
Data Byte #0 Calibration control variable:
0 - Exit calibration
1 - Start calibration
2 - Store calibration value
3 - Get calibration status
Data Byte #2 Calibration status corresponds to the number of iterations carried out. After 255
measurements are ìcollectedî, calibration as a process is finished, and calculated zero is
preserved in RAM until Command #151 will be received with StartCalibration or
StoreCalValue value of control variable.
NOTE: After calibration is activated, any subsequent StartCalibration request is ignored; for such requests zero is
responded as CalibrationStatus. Until StartCalibration request is not concluded by either ExitCalibration or
StoreCalValue, it will not be possible to start another calibration.
COMMAND-SPECIFIC RESPONSE CODES
0 No Command-Specific Errors
1 Undefined
2 Invalid Selection (Of Control Variable)
3-4 Undefined
5 Too Few Data Bytes Received
6 Undefined
7 In Write Protect Mode
8 Update Failure
9 No Zero Value (Iterationsí Number < 255)
10-127 Undefined
8.21 Command #152 Quit Errors