
19
CARLO GAVAZZI
CONTROLS
SERIAL COMMUNICATION PROTOCOL
WM4-96
V1 R3
Page
Digital inputs code
kWh Digital input
0 ON
1 OFF
kvarh Digital input
0 ON
1 OFF
F1 Digital input
0 ON
1 OFF
F2 Digital input
0 ON
1 OFF
Gas Digital input
0 ON
1 OFF
Water
Digital input
0 ON
1 OFF
The “Gas” digital input can be used to collect either the gas pulses or the kWh- pulses according to
the chosen working mode (see paragraph 3.1.17).
The “Water” digital input can be used, according to the chosen working mode, to collect the water
pulses, the kvarh- pulses, or to select between day or night gas tariff (see paragraph 3.1.17).
Example 16: reading of the “present modules+digital input status” word
1-word read request frame (8 byte)
01h
04h
08h
00h
00h
01h
CRC
CRC
1-word read answer frmae (8 byte):
01h
04h
02h
70h
F4h
CRC
CRC
Module variable value: 70F4h = 0111000011110100
Available modules: RS232, clock, digital output 1 and 2.
Digital input status: Gas = ON
Water = ON
kWh+ = OFF
kvarh+ = OFF
Tariff F1= OFF
tariff F2= OFF
Comentarios a estos manuales