Pilz PNOZ mmc1p ETH - Manual (Page 10)

2.2 Modbus/TCP with PNOZmulti
2 Communication via Modbus/TCP
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2.2 Modbus/TCP with PNOZmulti 2200 Modbus/TCP with PNOZmulti 2- ModbusTCP_Modbus/TCP Allg-2-PNOZmulti
All base units from the modular safety system PNOZmulti that have an
Ethernet interface (PNOZ m1p ETH from V2.1) support Modbus/TCP.
The same applies for the base units PNOZmulti Mini in conjunction with
a communication module with Ethernet interface.
A PNOZmulti base unit can manage a max. of 8 Modbus/TCP connec-
tions. The PNOZmulti is always the Server in a connection. The Clients
in the connections may be various devices, e.g. PC (PNOZmulti Config-
urator), control system, display unit. They can access the modular safety
system PNOZmulti simultaneously.
The virtual I/Os plus all the information that is polled during fieldbus
communication are contained in data areas. The data is accessed di-
rectly. It's no longer necessary to switch via table/segment.
The configurations required for Modbus/TCP are fully pre-configured in
the PNOZmulti operating system. All that's necessary in the PNOZmulti
Configurator is to activate the virtual inputs and outputs (see PNOZmulti
Configurator's online help, under "Display and edit module selection").
On a modular control system PNOZmulti, port number "502" is fixed as
the default for data exchange via a Modbus/TCP connection. It is not
displayed in the PNOZmulti Configurator and cannot be modified.