8.1.5 DIGITAL INPUTS
The status of the digital inputs of the heater can be monitored using the Input Register 0x02
07 04 00 02 00 01 90 6C
Where:
07
is the slave address.
04
is the function used. Read Input Registers.
00 02
is the address of the first Input Register to be read.
00 01
is the number of records to be read.
90 6C
is the CRC.
The heater response is:
07 04 02 00 0F 71 34
Where:
07
is the slave address.
04
is the function used. Read Input Registers.
02
is the quantity of bytes received.
00 0F
is the state received, 1111 in binary:
-
Bit 3 is 1: Heating element #3# is on.
-
Bit 2 is 1: Heating element #2# is on.
-
Bit 1 is 1: Heating element #1# is on.
-
Bit 0 is 1: There is water flow.
71 34
is the CRC.
The read states correspond to a heater that is warming since the water temperature is below the set
point.
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