Latched Alarms - Astralpool 65321 Manual Del Usuario

8.1.7 LATCHED ALARMS

It is possible to view a report on the alarms produced so far. The Holding Register 0x20 contains
information about the status of alarms produced until that moment, activating the corresponding bit/s
by:
.bit 1 Overheating
.bit 3 Water flow needed and not present
.bit 14 Freezing risk
To check the status of the alarm memory, send the string:
07 03 00 20 00 01 85 A6
Where:
07 is the slave address.
03 is the function used. Read Holding Registers.
00 20 is the address of the first Input Register to be read.
00 01 is the number of records to be read.
85 A6 is the CRC.
Received response is:
07 03 02 40 08 00 42
Where:
07 is the slave address.
03 is the function used. Read Holding Registers.
02 is the quantity of bytes received.
40 08 is the state of the alarms memory. Binary equivalent is 100000000001000:
- Bit 3 is 1: water needed and not present.
- Bit 14 is 1: Freezing risk.
00 42 is the CRC
The values of active bits will remain in that state even after disarming the alarm from the keyboard of
the heater. To reset its value, do it by directly typing into Holding Register 0x20. It is also reset when
the heater loses electrical supply.
Example to reset alarm history:
07 06 00 20 00 00 88 66
Where:
07 is the slave address.
06 is the function used Preset Single Register.
00 20 is the address of the Holding Register to be written.
00 00 is the value to be written
88 66 is the CRC.
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