Vaisala AQT530, Configuration Manual, Page: 54 / 64

Address RW Type Unit Register
count
Description
0x00B4 R char[8] - 4 AQT product device serial number (8-character
string)
0x00B8 R char[8] - 4 HMP serial number (8-character string)
0x00BC R char[8] - 4 LPC serial number (8-character string)
0x00C3 R int16 - 1 Circuit board serial number, part 1
0x00C4 R int16 - 1 Circuit board serial number, part 2
0x00C5 R int16 - 1 Circuit board serial number, part 3
0x00F4 R uint16 - 1 LPC firmware version major number
0x00F5 R uint16 - 1 LPC firmware version minor number
0x00F6 R uint16 - 1 LPC firmware version build number
0x00F7 R uint32 - 2 LPC firmware version hash number
0x00FA W uint16 - 1 Reset device
• 1 = Reset device
• Other values = no effect
0x00FE W uint16 - 1 Write configuration to the onboard EEPROM
memory
• 1 = Write configuration
• Other values = no effect
6.6 Setting up system time over Modbus
interface
You can read and write the system time over the Modbus interface.
1. To read system time, read register 0x0057 first.
This reads the current system time to a cache and prevents the value from changing
when other system time registers are accessed.
2. After reading the register 0x0057, read registers 0x0058 ... 0x005C to get month, day
of month, hours, minutes and seconds.
The reading order of these registers is free.
3. To write the system time, set the year, month, day of month, hours and minutes by the
means of the registers 0x0057 ... 0x005B.
This writes the date to the cache.
4. To finish updating the system time, write seconds to register 0x005C.
This updates the system time immediately by applying all the recent values from the
cache.
AQT530 Configuration Guide M212572EN-C
52