Siemens SITRANS RD200 Operating Instructions Manual page 85

Code: 44 Description: 4-20 mA Output - Input and Output Points
Command: Read
SOH Meter
(0x01) Address
Command: Write
SOH Meter Meter
(0x01) Address Address
Reply: Write and Read
STX
'4' '4'
(0x02)
Read and write the value for 4-20 mA Input and Output points. The first argument
specifies which point is to be accessed. The data field following it is 7 characters.
Note that the values for DAC Outputs 1 and 2 actually represent 0.00 to +23.99 milliamps.
The range for Display Values is –1999 to +9999. The decimal point in the write command is
implied. The decimal point in the reply for the Display Values will reflect the presently
selected decimal point, but is fixed (00XX.XX) for the DAC Output values.
The following table shows the arguments for the various limit parameters.
Argument
'0'
'1'
'2'
'3'
Code: 47 Description: Cutoff Value
Command: Read
SOH Meter
(0x01) Address
7ML19985JS01
Meter
'4'
Address
'0'
'4' '4' to
'3'
'+'
'0' '0' X
'-'
Point
Display Value 1
Display Value 2
DAC Output 1
DAC Output 2
Meter
Address
SITRANS RD200 – OPERATING INSTRUCTIONS
'0'
Check-
'4' to
sum
'3'
'+'
'0' '0' X X X X
'-'
X X X X
Range
-1999 to +9999
-1999 to +9999
00.00 to +23.99
00.00 to +23.99
'4' '7' '9'
Check- ETX
sum (0x03)
Check- Check- ETX
sum sum (0x03)
Check- Check- ETX
sum sum (0x03)
ETX
'5'
(0x03)
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