Carel MPXPRO User Manual page 28

ENG
PH: Type of refrigerant
IThe type of refrigerant is essential for calculating the superheat.
In addition, it is used to calculate the evaporation and condensing
temperature based on the pressure probe reading. Below is the table of
refrigerants allowed and their compatibility with the CAREL E
Par. Description
PH Type of refrigerant
1 = R22
2 = R134a
3 = R404A
4 = R407C
5 = R410A
6 = R507A
7 = R290
8 = R600
9 = R600a
10 = R717
11 = R744
12 = R728
13 = R1270
14 = R417A
In: Type of unit
Parameter In assigns the controller the function of Master or Slave.
To convert a Master controller to a Slave:
1. set parameter In=0.
To convert a Slave controller to Master:
1. install the RTC and RS485 interface card (MX3OP48500);
2. set parameter In=1.
Par. Description
In Type of unit
0 = Slave; 1 = Master
Sn: Number of Slaves in the local network
This parameter tells the Master controller how many Slave controllers it
has to manage in the local network. If Sn = 0, it is a stand alone display
case. The maximum number of Slave controllers in a subnetwork is 5. On
Slave controllers the parameter must be left at 0.
Par. Description
Sn Number of Slaves in the local network
0 = no Slave
H0: Serial or Master Slave network address
On a Master controller this represents the address of the controller in
the CAREL or Modbus® supervisory network. On a Slave controller, it
represents the address of the controller in the local network (1 to 5). In
this case, the address in the CAREL or Modbus® supervisory network will
be the address of the Master added to the address of the Slave.
Par. Description
H0 Serial or Master Slave network address
Important: if more than one Master, with their own local networks,
are connected to a supervisor network, the address set for each
Master must consider the number of Slaves in the previous network.
MPXPRO - + 0300055EN rel. 1.0 30/08/10
2
V valve.
Def Min
3 1
Compatibility
2
with CAREL E V valve
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




Def Min Max
0 0 1
Def Min Max
0 0 5
Def Min Max
199 0 199
Example: to confi gure the addresses in a supervisor network made
up of three Master controllers that manage 5, 3 and 1 Slave controllers
respectively.
Solution: assign, for example, the fi rst Master controller serial address
H0=31, which also represents the controller address in the supervisor
network, the serial address of the second Master controller will be 37 and
Max
the third 41.
14
See the following fi gure.
Note: only the Master controller must be connected to the RS485
serial line, all Slave controllers communicate with the supervisor
via the Master controller over the tLAN.
Note: MPXPRO works with CAREL and Modbus® supervisory
network. The controller automatically identifi es the protocol type.
Tab. 4.h
UoM
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Tab. 4.i
UoM
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Tab. 4.j
UoM
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Tab. 4.k
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