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MIW-MCS-1-LCD-EN-000 - 20 / 07 / 2016
13 - 33
CONTROL FUNCTION
Analogue outputs in function of the normal priority and high priority inputs
The value of an analogue output in control mode follows a linear function of the
input with normal priority until the high priority assigned input reaches its setpoint.
The value then rises to the maximum value in the selected “time to maximum”
timespan. The output stays at maximum until the high priority input value reaches
SP – hysteresis, and then it drops following the linear function of the input with
normal priority.
PID CONTROL
During the PID control the analogue output changes to keep the assigned normal
input value at its selected setpoint level. The proportional gain (Kp), integration
period (Ti) and derivation period (Td) of the PID control are free configurable to set
the required slope, gain or magnitude.
The implemented autotune function calculates the parameters automatically
according to the system.
ANALOGUE OUTPUTS IN FUNCTION OF THE DIGITAL INPUTS
The analogue outputs can individually correspond to the state of the digital input.
When a digital input with remote off function becomes ‘active’, the related analogue
output drops to 0 and goes back to the current function value (Linear, Control or PID)
when it becomes ‘inactive’. When a digital input with ‘maximum output’ function
becomes ‘active’, the related analogue output rises to maximum and goes back to
the current function value (Linear, Control or PID) when it becomes ‘inactive’. All the
digital inputs have priority to all the other inputs (Ai1, Ai2, T1 and T2).
FREE
The second analogue output Ao2 is independent from the first analogue output Ao1.
BALANCED
The value of the second analogue output Ao2 follows the value of the first output Ao1.
UNBALANCED
In unbalanced mode the value of the second analogue output Ao2 follows the function
of the first output Ao1 according to the set offset values. See the
with positive and negative unbalanced (offset) coefficient.
RELAY CONTACT FUNCTION
Depending on the pre-selected active state of a relay, the relay contact switches
open or closed at the previously set setpoint of the assigned analogue or temperature
input, and switches back (closed or open) at the SP - hysteresis value.
In case there is an assigned digital input for relay switching, the relay contact
switches open or closed at the event of active state and switches back (closed or
open) when the state changes to inactive.
MCS-1-LCD
MULTIFUNCTIONAL LOGIC
CONTROLLER
