KROHNE IFC 010 Converter HART - Manual (Page 25)

HARTÆ Communications Protocol
IFC010 Command Specification Rev: 1.0 Release Date: 29 May 1997
© 1997 KROHNE Mefltechnik D-47058 Duisburg Page 25
0 No Command-Specific Errors
1 Undefined
2 Invalid Selection (of Language)
3-4 Undefined
5 Too Few Data Bytes Received
6 Undefined
7 In Write Protect Mode
8 Update Failure
9-127 Undefined
8.19 Command #150 Enable/Disable Password Protection
Installs/uninstalls write protection. Two transaction are implemented: Transaction #1 disables write protection, in this
case a correct password must be ìshownî to transmitter. If protection is disabled and device is open for write operations,
any of two transactions can be used to enable factory-set password. Then the contents of Password field for Transaction
#1 is ignored.
TRANSACTION #0
REQUEST DATA BYTES
#0
WRITE
PROT
CODE
RESPONSE DATA BYTES
#0
WRITE
PROT
CODE
TRANSACTION #1
REQUEST DATA BYTES
#0 #1 #2 #3 #4
WRITE PROT PROT
PROT CODE CODE
CODE MSB LSB
RESPONSE DATA BYTES
#0
WRITE
PROT
CODE
Data Byte #0 Write Protect Code, available via Command #15, Read Primary Variable Output Information:
0 - Not Write Protected
1 - Write Protected
Data Byte #1-#4 HART- encrypted password of the instrument, unsigned long. The encoding scheme is as
follows: the ìRightî-key of device keypad is coded by digit м0о, ìEnterî-key - by м1о and
ìUpî-key - by м2о. For example, some arbitrary key combination ìRight-Right-Up-Up-Up-
Right-Enter-Up-Upî will result in 2220122 (leading zeroes are defaulted for password
operations anywhere).
NOTE: Any nonzero value of Write Protect Code will be interpreted by transmitter as a request to enable protection.
COMMAND-SPECIFIC RESPONSE CODES