Functions of Computer Communication Unit | FP2−CCU |
1.2Unit Operation
1.2Unit Operation
1.2.1Operation Overview
The Computer Communication Unit reads and writes data and contacts of the CPU unit by the host computer, through an RS232C interface.
When a command is sent from a host side, a response is returned from the PLC side. The formats of commands and responses are determined by the MEWTOCOL, which is the communication protocol for the FP series of PLCs.
Programs for host side devices such as computers and display panels are created in accordance with the protocol “MEWTOCOL”.
More than 20 types of commands are available, including commands for reading and writing the data area and contacts, etc.
No program is necessary on the PLC side in order to carry out communication.
Example:
When the contents of the data registers are read to a host computer:
DT0 5
DT1 10
DT2 3
Command
%01#RDD0000000001**CR |
|
|
RS232C | Computer | |
%01$RD05000A0062CR |
|
|
Response | AM 5 |
|
| メインメニュー 3時15 | |
| 照明制御を選択 |
|
| 空調制御 |
|
| ～ ～ 館内掲¦板 | |
| ～～～～ | ～～ |
| L | ～ |
Display panel
Tip
The display panel for the FP series was designed ahead of time in conformance with the MEWTOCOL communication protocol, so there is no need to take the contents of commands into consideration.
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