www.Siargo.com MF / FS4000 User Manual 19 | P a g e
5.5.4. Function codes
The Modbus function codes applied for the product are the sub-class of the standard Modbus
function codes. These codes are used to set or read the registers of the product:
Table 5.5: function codes
Write one single 16-bit register
5.5.5. Registers
The product (MF4600) has multiple registers available for the assignment of the various functions. With these
functions, the user can obtain the data from the products, such as product address and flow rates from the
registers, or set the product functions by writing the corresponding parameters.
The currently available registers are listed in the following table, and the registers may be customized upon
contact the manufacturer. Where R: read; W: write-only; W/R: read and write.
Note: At the time of shipping, the write protection function is enabled except for address and baud rate.
Once the user completes the register value change, the write protection will be automatically enabled
once again to prevent incidental data loss.
Table 5.6: Registers
Totalizer or accumulated flow rate (R)
Communication baud rate (R/W)
Gas conversion factor (R/W)
Response time or sampling time (R/W)
Reset or calibrate offset (R/W)
Set high flow rate alarm (R/W)
Set low flow rate alarm (R/W)
Disable a specific parameter entry (W)
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