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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)