KROHNE UFC 500 HART - Manual (Page 20)

HARTô Smart Communications Protocol
UFC500 Command Specification Rev: 2.0 Release Date: 9 Jun 2001
© 2001 KROHNE Mefltechnik D-47058 Duisburg Page 20
8.6 Command #135 Write Analog Output Low Flow Cutoff Control And Values
Writes low flow cutoff parameters for any of the two outputs.
REQUEST DATA BYTES
#0 #1 #2 #3
ANALOG CUTOFF CUTOFF CUTOFF
OUTPUT CONTROL ON OFF
NUMBER VALUE VALUE
CODE
RESPONSE DATA BYTES
#0 #1 #2 #3
ANALOG CUTOFF CUTOFF CUTOFF
OUTPUT CONTROL ON OFF
NUMBER VALUE VALUE
CODE
Data Byte #0 Analog Output Number Code, equals м1о for current output and м2о - for pulse output.
Data Byte #1 Cutoff control variable:
0 - enables cutoff option,
1 - disables cutoff option.
Even when the cutoff option is switched from On to Off, the rest data in request packet is
processed and the On/Off Values will be altered in transmitter EEPROM.
Data Byte #2 Cutoff On Value, in % of the Primary Variable Upper Range Value. This byte is meaningful
even if Data Byte #0 = 0. Value must belong to interval 1..19%.
Data Byte #3 Cutoff Off Value, in % of the Primary Variable Upper Range Value. This byte is meaningful
even if Data Byte #0 = 0. Value must belong to interval 2..20%.
Refer also to comments for the previous command.
NOTE: Low flow cutoff settings can be altered only when the function of corresponding output is related to flowrate
measurements. Refer to Command #138, Read Analog Output Function.
COMMAND-SPECIFIC RESPONSE CODES
0 No Command-Specific Errors
1 Undefined
2
Invalid Selection (of Analog Output)
3-4 Undefined
5 Too Few Data Bytes Received
6 Local Device User
7 In Write Protect Mode
8 Undefined
9 Off Value too High
10 Off Value too Low
11 On Value too High
12 On Value too Low
13 On Value not Lower than Off Value
14 Undefined
15 Invalid Cutoff Control or Output Function
16-127 Undefined