Chapter 6 Predefined Protocol Support Function - Mitsubishi Electric FX5 User Manual

6
PREDEFINED PROTOCOL SUPPORT
FUNCTION
This chapter describes predefined protocol support function (built-in Ethernet).
For details on the predefined protocol support function (serial communication), refer to MELSEC iQ-F FX5 User's Manual
(Serial Communication).
Outline
Data can be exchanged between the external device (such as measuring instrument and bar code reader) and the CPU
module following the protocol of the device.
Data that varies according to communication session can be handled by incorporating a device or buffer memory into the
communication packet.
Sets the protocol required for communication with the external device using the engineering tool.
The protocol can be set by selecting from the predefined protocol library (SLMP, MODBUS/TCP
and edited.
*1 The SLMP and MODBUS/TCP are available only in the client.
 Setting protocols
Protocols can be set easily using the predefined
protocol support function of GX Works3.
GX Works3
External device
The number of protocols and packets that can be registered is as follow.
• Protocols: 64 maximum
• Packets: 128 maximum
• Packet data area size: 6144 bytes maximum
When the number of packets reaches the upper limit, protocols cannot be added even if the number of
protocols has not reached the upper limit.
If the packet data area size reaches the upper limit, protocols and packets cannot be added even if the
number of protocols and packets has not reached the upper limit.
Applicable connections
The connections Nos. 1 to 8 can be used for communications using the communication protocol support function.
 Writing protocols
Write the set protocols in the CPU module.
CPU module
 Executing protocols
Execute protocols by dedicated instructions.
Multiple protocols can be executed by one dedicated instruction.
*1
, etc.), or it can be created
Sending
Receiving
Data can be communicated
with protocols appropriate
to each external device.
6 PREDEFINED PROTOCOL SUPPORT FUNCTION
External device
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