Interfaces to automation systems
8.2 Modbus interface
SITRANS SL
140 Operating Instructions, 12/2010, A5E01132948-04
Table 8- 5 Status coding for "uncertain quality":
Dec Hex Cause Remedy
64 40 Quality status of source is uncertain Depending on the Modbus source the
quality status is mapped to error code
E23 for temperature or E24 for pressure.
65 41 Quality status of source is uncertain and
temp. or pressure is low limit
Temperature: E23 & E13
Pressure: E24 & E17
66 42 Quality status of source is uncertain and
temp. or pressure is high limit
Temperature: E23 & E14
Pressure: E24 & E18
67 43 Quality status of source is uncertain and
temp. or pressure is constant
Temperature: E23 & E15
Pressure: E24 & E19
Table 8- 6 Status coding for "good quality":
Dec Hex Cause Remedy
128 80 Ok
129 81 Quality status of temp. or pressure is low
limit
Depending on the PROFIBUS source the
quality status is mapped to specific error
code for temperature or pressure.
Temperature: E13
Pressure: E17
130 82 Quality status of temp. or pressure is high
limit
Temperature: E14
Pressure: E18
131 83 Quality status of temp. or pressure is
constant
Temperature: E15
Pressure: E19
See also
Quality byte (Page 133)
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