Mitsubishi Electric QJ71C24N User Manual page 207

8 DATA COMMUNICATION USING THE PRE-DEFINED PROTOCOL
For details, refer to the following manual.
Operating Manual (Pre-defined protocol support function)
(1)
(2)
(2) Numbers of protocols and packets that can be registered
8 - 2
POINT
A protocol used in the pre-defined protocol function is a means for
communicating with an external device.
It comprises of the following information:
• Packet element (packet format)
• Packet data
• Communication type (Send only, Receive only, or Send and receive)
The function cannot be used when the QJ71C24N(-R2/R4) is used with the
following modules.
• Redundant CPU
• C Controller module
• MELSECNET/H remote I/O station
The following are the maximum numbers of protocols and packets that can be
registered.
• Protocols: Up to 128
• Packets: Up to 256
Once a protocol is registered, a packet determined for each protocol is registered
to the packet data area.
Because of this, the available number of protocols is 127 or less when:
1) The number of registered packets reached the maximum (256).
2) The usage rate of the packet data area reached 100%.
The usage rate of the packet data area can be confirmed in GX Configurator-SC
(Pre-defined protocol support function).
Note that the usage rate of the packet data area varies by protocol.
MELSEC-Q
8
8 - 2