Siemens HydroRanger 200 HMI - Relay function codes (2.8.1.4. Relay function only)

Communications
C.36 Split values
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
341
C.36
Split values
Certain parameters are actually pairs of numbers separated by a colon, using this format:
xx:yy
.
One example is Echo Confidence as shown in Measurement View 2 [
The local display
(Page 51
)
], where:
xx
= the average noise value in dB
yy
= the peak noise in dB
The number which corresponds to
xx:yy
, either for reading or setting a parameter, is
determined by the following formula:
For storing to the device:
value = (
xx
+ 128) x 256 + (
yy
+ 128)
For reading from the device:
xx
= (value / 256) – 128
yy
= (value % 256) – 128
where % is the modulus operator.
The modulus can be computed by following these steps:
value
1
= value / 256
value
2
= remainder of value
1
value
3
= value
2
x 256
yy
= value
3
– 128
It may simplify parameter to notice:
xx
= (most significant byte of value) – 128
yy
= (least significant byte of value) – 128