2.7 Communications with a Mitsubishi PLC (QnA-compatible 3E Frame Protocol)
Message Functions
2-172
Pro-Typ (Communications Protocol)
Specify the type code of the communications protocol.
Cir-No (Circuit Number)
Specify the circuit number for the communications device.
Specify the same circuit number as displayed in the MPE720 Module Configuration Definition Tab Page.
The following table gives the valid circuit numbers.
Ch-No (Communications Buffer Channel Number)
Specify the channel number of the communications buffer.
You can specify any channel number provided it is within the valid range.
The following table gives the valid channel numbers.
If the communications device is the 218IFD, there are 10 channels of communications buffers available
for both transmission and reception. Therefore, 10 connections may be used for sending and receiving at
the same time by using channels 1 to 10.
Type Code
Communications
Protocol
Remarks
1 MEMOBUS
Select this protocol when using the QnA-compatible 3E Frame proto-
col. MEMOBUS is automatically converted to QnA-compatible 3E
Frame protocol inside the 218IFD.
2
No-protocol communica-
tions 1 (unit: words)
This code is not used for the QnA-compatible 3E Frame protocol.
3
No-protocol communica-
tions 2 (unit: bytes)
This code is not used for the QnA-compatible 3E Frame protocol.
Communications Device Valid Circuit Numbers
218IFD 1 to 8
When executing more than one function at the same time, do not use the same channel number for the
same connection. You can use the same channel number as long as multiple functions are not executed
at the same time.
Communications Device Valid Channel Numbers
218IFD 1 to 10
There must be as many MSG-SNDE or MSG-RCVE functions as the number of connections used at
the same time.
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