FPΣ User's Manual 
 
8.1 Communication Modes 
155 
8.1.2  Ports: Names and Principle Applications 
The TOOL port is provided as a standard feature of the FPΣ. The ports on the communication 
cassette are treated as COM port 1 and COM port 2. The principle applications of the various 
ports are described below. 
Port name  Availability  Communication mode 
TOOL port  Standard equipment (mini DIN 5-pin connector)
• MEWTOCOL-COM Slave 
1)
 
•  Program controlled (in RUN mode only)
2)
 
COM port 1 
Only on optional communication cassette 
• MEWTOCOL-COM Master/Slave 
• Program controlled 
• PLC Link 
•  Modbus RTU Master/Slave 
COM port 2  Only on optional communication cassette 
• MEWTOCOL-COM Master/Slave 
• Program controlled 
•  Modbus RTU Master/Slave 
 
1)
 
The master function cannot be used with the TOOL port. 
2)
 
In PROG mode, the TOOL port is automatically set to MEWTOCOL-COM mode even if program controlled 
mode has been selected. This way it is always possible to communicate in PROG mode with a programming 
software like FPWIN Pro. 
 
8.1.3 MEWTOCOL-COM Master/Slave 
This communication mode uses the proprietary MEWTOCOL-COM protocol to exchange data 
between a master and one or more slaves. This is called 1:1 or 1:N communication. A 1:N 
network is also known as a C-NET. 
 
MEWTOCOL-COM connection between a computer and the FPΣ 
1
 
Command message 
2
Response message 
 
There is a MEWTOCOL-COM master function and a MEWTOCOL-COM slave function. The 
side that issues commands is called master. The slave receives the commands, executes the 
process and sends back responses. The slave answers automatically to the commands 
received from the master, so no program is necessary on the slave. 
 
REFERENCE
 
For detailed information on the MEWTOCOL-COM communication mode, see 
"
MEWTOCOL-COM" on page 171.