Wago 759-302 COMMISSIONING TOOL I/O-CHECK 2 759-302 Ficha De Dados

78  •    Operation (Overview) 

 

The following parameter changes are possible: 

Setting and readjusting the input module for RTDs 750-461/003-000, 

Setting the input module for thermocouples 750-469/003-000, 

Special Modules 

Setting the serial interface module RS 232 C 750-650/003-000, 

Setting the serial interface module RS 485 750-653/003-000. 

Open the parameter dialog box of the selected bus module by executing the 
command Settings in the context menu of the module in the node display or 
navigationbar. 

Note: 
Before changing the parameters make sure that you save the setted values 
in a parameter file. This will enable you to access the original values in the 
case of an incorrect parameterization. To do so, use the S

 and O

 

buttons in the parameter dialog box. 

Select the connected sensor type and set the required operation parameters. 

Press the D

 button to show the default values for this module. You can 

change the shown values if required. 

Store the changed values in the EEPROM of the module by pressing the 
A

 button and quit the parameter dialog box by pressing the C

 

button. 

A suitable calibration device (e.g. an electronic calibrator or highly accurate 
precision resistors) is needed to adjust the module. The adjustment with two 
resistors of 100Ohm and 200Ohm is described below. 100Ohm corresponds to 
0°C and 200Ohm to 266.4°C according to DIN  IEC  751.  

Open the parameter dialog box of the selected bus module. 

Set the module on Pt100 and 3-wire connection (RTD type = Pt100 and 
connection = 3-wire) and switch off the user and WAGO scaling (user and 
WAGO scaling = OFF). The temperature is emitted at intervals of 1/16°C. 
Press the 

button to get to the alignment dialog box. First connect 

the 100Ohm resistor and set the process value to 0x0000 (0°C) by modifying