Interfaces to automation systems
8.2 Modbus interface
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
139
Quality byte coding for measurement output:
Table 8- 1 Status coding for "bad quality":
Dec Hex Cause Remedy
00 00 Maintenance fault or process value fault. See alarm list
Table 8- 2 Status coding for "uncertain quality":
Dec Hex Cause Remedy
64 40 Maintenance demanded or process value
warning or process value out of tolerance.
See alarm list.
Table 8- 3 Status coding for "good quality":
Dec Hex Cause Remedy
128 80 Normal operation You can evaluate the measured values.
Quality byte coding of input values for process pressure and process temperature:
Table 8- 4 Status coding for "bad quality":
Dec Hex Cause Remedy
00 00 Quality status of source is bad Depending on the PROFIBUS source the
quality status is mapped to error code
E12 for temperature or E16 for pressure.
01 01 Quality status of source is bad and temp.
or pressure is low limit
Temperature: E12 & E13
Pressure: E16 & E17
02 02 Quality status of source is bad and temp.
or pressure is high limit
Temperature: E12 & E14
Pressure: E16 & E18
03 03 Quality status of source is bad and temp.
or pressure is constant
Temperature: E12 & E15
Pressure: E16 & E19
To Next Page
Loading...
