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5.5 Interfacing via MODBUS TCP/IP
The drive in the upper part has 2 ethernet ports which are related to a single network interface,
the ethernet parameters of the drive can be configured through a "DC Control" program that will
be supplied with the drive. The drive is a Modbus server, to implement the communication it will
be necessary to implement a Modbus Client on the PLC or on the controller to read and write the
variables on the drive.
The variables of the Drive program are exchanged using the 16Bit Modbus Holding registers. The
program variables, being 32-bit, use 2 consecutive holding registers and it is necessary to pay
attention to the endian of the controller used compared to the one configured on the drive. In the
Profinet interface table it is possible to see the reference addresses of the variables in the Modbus
holding register column.
When implementing the Modbus Client, it must be considered that in some functions already
implemented as for Siemens PLCs, the index of the Modbus register is shifted by 1 forward, for
example the "Modbus Commands" register will be between register 1203 and 1204.
To give the correct commands to the pumps it is also necessary to consider the reducer present on
each model:
• PCP 005, 015, 050 reducer 62:1
• PCP 150, 500, 1000 reducer 76:1
An FB block is available on request for Siemens S7 1200/1500, which completely manages the
communication with the drive.
The programming of the IP ADDRESS for the only Modbus TCP / IP communication can be done
through the specific software supplied DCCONTROL.
6 CONNECTION BETWEEN DRIVE AND PUMP
The cable supplied for the connection of the PCP pump is a 7 meter long shielded PUR cable
suitable for handling. Below the connection table:
PIN
DESCRIPTION
1
+ Motor
2
+ 5V Encoder
3
GND Encoder
4
- Motor
5
Channel A Encoder
6
Encoder A_ Channel
7
Channel B Encoder
8
Encoder B_ Channel
PCP VOLUMETRIC PUMP DRIVE
CABLE COLOR
PIN DRIVE
Black
M1-4
Brown
M2-1
Red
M2-2
Orange
M1-3
Yellow
M2-6
Green
M2-3
Blue
M2-7
White
M2-4
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