Vaisala Optimus OPT100 - Test Value Registers; Table 31 Test Value Registers (Read-Only)

Register
number
Address Register description Data
format
Notes
3 0002
hex
Measurement reliability 16-bit field 0 = Measurement is unreliable
because of high ambient
temperature
1 = Measurement is reliable
4 0003
hex
Gas alerts muted 16-bit field 0 = Gas level alerts operating
normally
1 = Gas level alerts muted
5 0004
hex
Combined cautions
• Gas level present values
• Gas level 24h avg ROC
• Gas level 7 day avg ROC
• Gas level 30 day avg
ROC
16-bit field 0 = No cautions are active
1 = At least one caution is active
6 0005
hex
Combined alarms
• Gas level present values
• Gas level 24h avg ROC
• Gas level 7 day avg ROC
• Gas level 30 day avg
ROC
16-bit field 0 = No alarms are active
1 = At least one alarm is active
A.4.4 Test value registers
Read the known test values from the test registers to verify the functionality of your Modbus
implementation.
Table 31 Test value registers (read-only)
Register number Address Data format Test value
201 00C8
hex
16-bit unsigned integer 12345
202 00C9
hex
32-bit unsigned integer 1234567890
00CA
hex
204 00CB
hex
64-bit unsigned integer 1234567890123456789
00CC
hex
00CD
hex
00CE
hex
208 00CF
hex
16-bit integer -12345
OPT100 User Guide M211858EN-U
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