1.3 Restrictions on Units Combination
1.3.1 Restrictions on the Number of Installed Units
There are following restrictions depending on units to be used.
Unit type Number of installed units Remark
Serial Communication Unit Max. 8 units
1.3.2 Restrictions on the Combination of Extension Cassettes
(Communication Cassettes)
● One communication cassette can be attached to the CPU unit, and two communication
cassettes to the serial communication unit.
● The FP7 communication cassette (Ethernet type) can be attached to the CPU only. It cannot
be attached to the serial communication unit (SCU).
1.3.3 Restrictions on Communication Functions to be Used
There are the following restrictions on functions to be used when using the SCU or ET-LAN that
is built in the CPU unit, or the serial communication unit (SCU).
Function to be used Restrictions
PLC link function
Up to two communication ports can be used. For using two ports, allocate
different link areas to them.
● CPU with built-in SCU (COM.1 port)
● Serial communication unit (COM.1 port)
MEWTOCOL-COM master
MODBUS RTU master
A maximum of 16 communication ports and the number of connections in
combination can be used simultaneously.
● CPU with built-in SCU (COM.0 port to COM.2 port)
● Serial communication unit (COM.1 port to COM.4 port)
● CPU with built-in ET-LAN (User connections 216)
MEWTOCOL-COM slave
MEWTOCOL7-COM slave
MODBUS RTU slave
A maximum of 15 communication ports and the number of connections in
combination can be used simultaneously.
● CPU with built-in SCU (COM.0 port to COM.2 port)
● Serial communication unit (COM.1 port to COM.4 port)
● CPU with built-in ET-LAN (System connections 1 to 4 / User connections
216)
General-purpose communication There is no restriction.
1.3.4 Unit to be Used and Applicable Versions of CPU Unit and FPWIN GR7
For using the unit, the following versions of CPU unit and FPWIN GR7 are required.
1.3 Restrictions on Units Combination
WUME-FP7COM-07 1-9
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