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14
ENG
c.pCO s0300057EN rel. 1.2 - 29.05.2017
P ort J26 configuration (c.p CO S mall...Extralarge)
c.pCO Small...Extralarge controllers are provided with 4 microswitches for
configuring serial port J26 (see figure):
•
microswitches all down: port J26 set with Fieldbus hardware;
•
microswitches all up: port J26 set with BMS hardware*.
Factory configuration: Fieldbus port.
(*) To use the serial port as a BMS connector, the correct communication
protocol needs to be set in the application, using the c.suite
programming environment.
C1
NO1 NO2 NO3
C1 C4
NO4 NO5 NO6
C4 C7
NO7
C7
NO8
C8
NC8
FieldBus
4 3 2 1
BMS
1 2 3 4
BMS
FieldBus
J26
J26
Fig. 3.b
3.2 Ethernet ports
The c.pCO Small...Extralarge controllers have two 10/100 Mbps/s Ethernet
ports. These two ports are connected internally via a switch that automatically
forwards any pass-through traffic not addressed to the controller. If the
controller is not powered, pass-through between the two ports will be
interrupted. The two ports feature auto crossover (Auto-MDIX). The c.pCOmini
High End controller features one 10/100Mbps/s Ethernet port.
3.3 Controller network connections
Multimaster or Master/Slave networks of c.pCO controllers can be created
using the Ethernet ports and the serial ports:
Connection via Ethernet port
The built-in Ethernet ports on the c.pCO can be used to create multimaster
and multiprotocol networks, with transmission speeds up to 100 Mbps.
The controllers can be connected together via an external switch (see the
figure below). For c.pCO Small...Extralarge models, the two Ethernet ports
are connected by an internal hub-switch, meaning a daisy-chain network
can be created without needing an external switch (see figure 3.c).
PlantVisorPro
S w itch
J3 Disp
+Vterm
L H
J4 FBus J5 CAN J3 Disp
+Vterm
L H
J4 FBus J5 CAN
PGD terminal
touch screen
c.pCO mini
max 100 m
c.pCO mini
J25 BMS2 J26 FBus2
J11 pLAN
c. pCO
MASTER
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
MASTER MASTER
PC
S w itch
J25 BMS2 J26 FBus2
J11 pLAN
c. pCO
MASTER
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
MASTER MASTER
PC
max 100 m max 100 m max 100 m
Fig. 3.c
Connection via serial ports:
A master/slave network of c.pCO controllers can be created by using the
RS485 serial ports. Such networks comprise:
•
one c.pCO controller (Master) that communicates via the Fieldbus
RS485 serial port using Carel Master or Modbus Master protocol;
•
one or more c.pCO controllers (Slaves) connected to the point-to-point
network via the BMS RS485 serial port using Carel Slave or Modbus
Slave protocol.
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
MASTER
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
MASTER - SLAVE network
SLAVE SLAVE
PC
MASTER
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
SLAVE SLAVE
Fig. 3.d
Important warnings:
1.
By applying appropriate impedance, a serial port with Master
hardware (FBus) supplies the network with the bias voltage required
to run all the connected devices, i.e. the master itself and its slaves;
conversely, serial ports with slave hardware (BMS) do not provide bias
voltage, so it is always advisable to connect at least one device with
master hardware (FBus) to the network so that it is correctly biased;
2.
However, no more than two devices with master hardware (FBus)
can be connected to the same network, otherwise the network total
bias impedance becomes too small and incapable of supplying the
required voltage to the RS485 network.
3.
It is recommended to connect the serial probes or other field devices
to an optically-isolated version of the Fieldbus serial port or to serial
port TWO – Fieldbus 1 to exploit the filtering properties of optical
isolation.
Special cases
•
In networks consisting only of Master HW devices, no more than 2
devices can be connected. The max. length allowed for the network
is 1000 m. If the network is longer than 100 m, apply the 120Ω, 1/4W
terminating resistors to the first and last devices in the network;
•
connect the computer to a network with no more than 1 master HW
device or no more than 207 slave HW devices.