SICK VISIC100SF - Page 40

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8017171/115Z/V3-0/2019-01| SICKO P E R A T I N G I N S T R U C T I O N S | VISIC100SF
Subject to change without notice
INSTALLATION
3.7.3.3 Read Holding Register (0x03)
The Modbus-RTU interface register structure comprises all measured values and
associated measured value status. The coding of the measured value status behaves
synchronous to the measured value status of the PROFIBUS interface, see “Coding of mea-
sured value status of visibility”, page 43.
Table 10: Reading Holding Register Modbus-RTU
Register 123 contains information on the actual degree of contamination of the optics for
visibility measurement.
Coding of registers 127 & 128 (maintenance request/device fault), see
Table, see “Device error coding”, page 95 and see “Description of maintenance requests”,
page 96.
Example:
Read 4 byte float from slave (ID 101) with start address 100:
TX-> <65 03 00 64 00 02 8D F0>
RX-> <65 03 04 3F 48 2B 67 0C ED>
Current K-value = 0x3F482B67 ≈ 0.78
Register Designation Significance
100 K-value, 4 byte floating point, ABCD
102 K-value status, 1 byte unsigned integer
103 Dust concentration, 4 byte floating point, ABCD
105
Dust concentration status, 1 byte unsigned
integer
106 Uptime [h], 2 byte unsigned integer
Uptime: Operating hours since
last reset
107 OpHours [d], 2 byte unsigned integer OpHours: Total operating time in days
108 CO value, 4 byte floating point, ABCD
110 CO value status, 1 byte unsigned integer
111 CO-NextMrq [d], 2 byte unsigned integer CO-NextMrq: Operating days until next maintenance request of CO cell
112 CO-OpHours [d], 2 byte unsigned integer CO-OpHours: Operating duration of CO cell in days
113 NO value, 4 byte floating point, ABCD
115 NO value status, 1 byte unsigned integer
116 NO-NextMrq [d], 2 byte unsigned integer
NO-NextMrq: Operating days until next maintenance request of NO
cell
117 NO-OpHours [d], 2 byte unsigned integer NO-OpHours: Operating duration of NO cell in days
118 NO
2
value, 4 byte floating point, ABCD
120 NO
2
value, status, 1 byte unsigned integer
121 NO
2
value, NextMrq [d], 2 byte unsigned integer
NO
2
NextMrq: Operating days until next maintenance request of NO
2
cell
122 NO
2
value OpHours [d], 2 byte unsigned integer NO
2
OpHours: Operating duration of NO cell in days
123 Contamination, 2 byte unsigned integer Contamination: Contamination of sensor in percent
124 Temperature value, 4 byte floating point, ABCD External PT1000, optional
126
Temperature value status, 1 byte unsigned
integer
External PT1000, optional
127 Maintenance request, 2 byte unsigned integer
128 Device fault, 2 byte unsigned integer