MINI and MIX Series I/O modules/Modbus
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3.11.1.8 Input Forwarding
In this mode, any signal from the input is transferred directly to the assigned output without
any modifications. The input forwarding mode functioning can be stopped by Block Input
function (see Block Inputs register).
3.11.1.9 Heating mode (4U4O-H and 4U4O-H-IP only)
In this mode output is controlled as a typical thermostat, based on Setpoint register and
Control value (Input value) with differential parameter defined in Differential register. The
output signal works in 2 states low and high.
When Control value is lower or equal the difference of Setpoint register and differential
register the output is in low state.
When Control value is higher or equal the sum of Setpoint register and differential register
the output is in high state.
Output in low state:
Control value >= Setpoint + Differential
Output in high state:
Control value <= Setpoint – Differential
The heating mode algorithm is shown in chart below.
Figure 30 Heating mode algorithm functioning
WARNING! In the case when temperature sensor is failed (disconnected or shortcut) then
heating mode does not work and output stays in the false state.
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