MASTER unit
J11
Plan
Modbus
SLAVE unit
J11
Plan
Modbus
1
2
345
7
8910
6
pLAN cable characteriscs for MASTER/SLAVE connecon
36
Notes on connecng two Master/Slave units
Index Element Unit
Address
pLAN MODBUS
1
Display touch screen pGDTouch
Master
6
2
pCO5+ control board 1
3
EEV electronic valve driver 198
4
Driver turbocor 1 1
5
Driver turbocor 2 2
6
Display touch screen pGDTouch
Slave
7
7
pCO5+ control board 2
8
EEV electronic valve driver 198
9
Driver turbocor 1 1
10
Driver turbocor 2 2
The Master/Slave electrical connecon of the two chillers is performed
via a pLAN line cable as shown in the gure (doed line).
The pLAN address of the Master board must be set to 1 manually
(default seng).
The pLAN address of the Slave board must be set to 2 manually, according
to the following procedure:
1. Using a suitable screwdriver, press the "A" key for 5 seconds. The
pLAN address will start to ash;
2. Repeatedly press the key unl reaching the desired address and
remove the screwdriver;
3. wait unl the address starts ashing quickly, in this stage the
address is stored but not yet acve for the applicaon program;
4. Disconnect power from the control;
5. Return power to the control, now the address is acve;
IMPORTANT 1: Provide the "evaporator common output probe" of the
master and place it in a point where the water temperature change is
detected with only the master on or with only the slave on. If a storage
tank is present posion it inside it.
IMPORTANT 2: In case of WMX/G and TW110 should you wish to
change the mode (COOLING/HEATING) it must be done both on the
master and on the slave. The master does NOT force change of the
operang mode of the slave.
Connect the screen to the ground
L > 300 mm