10
880397M_MSW_GFX4-GFXTERMO4_08-2018_ENG
INPUTS
MAIN INPUT
The modular power controller has 4 main inputs to control 4 temperature zones, to which you can connect temperature
sensors (thermocouples and RTD), linear sensors or custom sensors to acquire process variable (PV) values.
To congure, you always have to dene the type of probe or sensor (tYP), the maximum and minimum scale limit
(Hi.S – Lo.S) for the process variable value, and the position of the decimal point (dP.S).
If the sensor is a thermocouple or resistance thermometer, the minimum and maximum limits can be dened on the specic
scale of the sensor. These limits dene the width of the proportional control band and the range of values settable for the
setpoint and alarm setpoints.
There is a parameter to correct the offset of the input signal (oF.S): the set value is algebraically added to the read of
the process variable.
You can read the state of the main input (Err) in which an input error is reported: when the process variable goes
beyond the upper or lower scale limit, it assumes the value of the limit and the corresponding state reports the error condition:
Lo = process variable < minimum scale limit
Hi = process variable > maximum scale limit
Err = Pt100 in short circuit and input value below minimum limit,
4...20mA transmitter interrupted or not powered
Sbr = Tc probe interrupted or input value above maximum limit
If noise on the main input causes instability of the acquired value, you can reduce its effect by setting a low pass
digital lter (Flt). The default setting of 0.1sec is usually sufcient.
You can also use a digital lter (Fld) to increase the apparent stability of the process variable PV; the lter introduces
a hysteresis on its value: if the input variation remains within the set value, the PV value is considered unchanged.
In the case of a Modbus TCP connection, the parameter ENABLE_DISABLE_BACKGROUND_TASK must be set
to 0 at Modbus address 65527 to make active the control on Dialog timeout.
Settings necessary to use the custom map
1. Set the internal variable of the card Enable serial background to address 65527 (0xfff7) to value 0 (default value for
this parameter is 1)
2. Set the internal variable of the UnLock Custom Map tab to address 65529 (0xfff9) to value 1 (the default value for
this parameter is 1)
Settings required for using the second modbus tcp channel
Set the internal variable of the Enable tab according to the TcpModbus socket at 65528 (0xfff8) to the value 1 (the default
value for this parameter is 0)
Settings required to reset the card to the default values
1. Turn on the instrument (if OFF)
2. Place rotary X10 = C and rotary X1 = 0
3. Wait for more than 10 seconds
4. Turn off the instrument
5. Reposition the rotary to the desired working value between 1 and 99
6. Turn the instrument on
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