PACMotion VFD Syllabus
Section 4
GFK-3167B
December 2020
Modbus/TCP Ethernet Demo (Note 1)
12
Starting the system
4.
As shown in the picture above, connect one ethernet port of the VFD
Modbus/TCP option module to the QuickPanel and connect the other ethernet
port of the VFD Modbus/TCP option module to the top port of CPE100.
5.
Power up the devices.
6.
Using a laptop PC with PAC Machine Edition, load in the PAC Machine Edition
project:
VFD_DEMOCASE_MBTCP_Vx and Download/Run the CPE100 and QuickPanel
targets. This will use the CPE100 as a Modbus/TCP Master.
7.
The QuickPanel Screen should show live PDI/PDO Data. Information on this data
is given below.
Modbus/TCP Process Data Exchange
The mapping of Process Data Output/Input to Modbus/TCP Registers is shown below.
Process Data Word
Modbus/TCP Register
1
*
PDO1
300001
PDO2
300002
PDO3
300003
PDO4
300004
PDI1
400001
PDI2
400002
PDI3
400003
PDI4
400004
Modbus/TCP Connection Timeout
The VFD Modbus/TCP interface allows the user to set the Communication Loss Timeout
and Communication Loss Action values. These parameters are at addresses P5-05 and P5-
06 respectively. The Timeout units are 1 = 0.1 sec and the range is from 0.0 (disable) to
5.0 seconds. A setting of 0.0 seconds will allow the VFD to continue running if
communications are lost.
1
Modbus Clients may address the first Modbus register as register 300001/400001. This assumes an address offset starting at 1. For
Clients that use zero based addressing just subtract 1.