User’s Manual 7M
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AUTO FREEZE INTERVAL REGISTER (41901)
The purpose of the auto freeze interval register is to freeze energy meters in the same time interval, for example, every day.
Set the certain auto freeze interval (in minutes). Maximum allowed value is 65535 minutes.
Periodic synchronization is activated automatically after the entered interval.
If the interval is set to 0, the auto freeze interval function is turned off.
The disadvantage of this register is that the time is not appropriate if the meters reset or in case of another failure.
STATUS REGISTER OF FREEZE (41905)
The purpose of the status register is to test the reliability of RS485 communication. Enter the broadcast command of different
identification codes between 1 to FFFD in the freeze status register (41905).
Repeatedly send a different identification code to the freeze status register (41905) in order to increase the reliability of receiving
commands. The reliability of reading different numbers of identification code enables analysis of communication reliability.
In the case of 100% reliability of communication, all instruments have the value of the first sent identification code, when
reading the status register.
After the instrument receives the identification code, it ignores all entries in the status register in the interval of one minute.
Send as many different identification codes in a short time interval.
For example, send the different identification codes ten times within one second. Use numbers from 1 to FFFD (1 - 65533).
For example, first use value 1, then D, AAA and at the end FFFD (see picture below). Please note that you never know if all the
meters will freeze, so send as many commands as possible within one minute.
PLEASE NOTE
Please do not use the values 0000, FFFF or FFFE.
The 0000 is reserved to start the meter when connected to the power supply.
Freeze function is performed.
The FFFF is reserved to trigger freezing function automatically (same as time to freeze register 41902).
The FFFE is reserved for the auto interval freeze.
Send the command for reading the register, so you can see which identification code has been accepted by the individual
instrument. The server calculates time from a freeze of the device.
ACCESS AND INTERPRETATION OF DATA
After the execution of the freeze command, the counters are stored into registers 41906 to 41938, which can be read by the master.
Register 41906 displays frozen tariff counter and registers 41907 to 41938 display frozen energy counters (1 - 16). The data we
read on all devices can this way be compared. Encoded information should be read with Modbus table (see Appendix A).
In addition, the time since the last freeze can be checked with time from freeze register (41903, 41904).
The purpose of these register is to control if displayed measurements are relevant.
The register contains time (in seconds) from the last freeze counters execution.
