DELTA VFD MS300 PLC Function Applications (USING DELTA MS300 IN PLC MODE) ENGLISH

Introduction
The commands provided by the MS300's built-in PLC functions, including the ladder diagram editing
tool WPLSoft, as well as the usage of basic commands and applications commands, chiefly retain
the operating methods of Delta's PLC DVP series.

16-1-2 WPLSoft ladder diagram editing tool
WPLSoft is Delta's program editing software for the DVP and MS300 programmable controllers in the
Windows operating system environment. Apart from general PLC program design general Windows
editing functions (such as cut, paste, copy, multiple windows, etc.), WPLSoft also provides many
Chinese/English annotation editing and other convenience functions (such as registry editing,
settings, file reading, saving, and contact graphic monitoring and settings, etc.).

Notes before PLC use
1. The MS300 provides 2 communications serial ports that can be used to download PLC
programs (see figure below).
2. Channel 1 communications format is the same as channel 2.
3. Channel 2 has a preset communications format of 7,N, 2, 9600, ASCII can be changed in Pr.
09-01 (transmission speed) and Pr. 09-04 (communication protocol).
4. The PLC preset is node 2; the PLC node can be changed in Pr. 09-35, but this address may not
be the same as the drive's address setting of Pr. 09-00.
5. The client can simultaneously access data from the drive and internal PLC, which is performed
through identification of the node. For instance, if the drive node is 1 and the internal PLC node
is 2, then the client command will be
 01 (node) 03 (read) 0400 (address) 0001 (1 data item), indicating that it must read the data
in drive Pr. 04-00
 02 (node) 03 (read) 0400 (address) 0001 (1 data item), indicating that it must read the data
in internal PLC X0
6. The PLC program will be disabled when uploading/downloading programs.
7. Please note when using WPR commands to write in parameters, values may be modified up to
a maximum of 106 times, otherwise a memory write error will occur. The calculation of
modifications is based on whether the entered value has been changed. If the entered value is
left unchanged, the modifications will not increase afterwards. But if the entered value is
different from before, the number of modifications will increase by one.
Chapter 16 PLC Function ApplicationsMS300 16-4
8. When Pr. 00-04 is set as 28, the displayed value will be the value of PLC register D1043 (see
figure below):
Digital Keypad KPC-CC01 (optional)
Can display 0~65535
9. In the PLC Run and PLC Stop mode, the content 9 and 10 of Pr. 00-02 cannot be set and cannot
be reset to the default value.
10. The PLC can be reset to the default value when Pr. 00-02 is set as 6.
11. The corresponding MI function will be disabled when the PLC writes to input contact X.
12. When the PLC controls drive operation, control commands will be entirely controlled by the PLC
and will not be affected by the setting of Pr. 00-21.
13. When the PLC controls drive frequency commands (FREQ commands), frequency commands
will be entirely controlled by the PLC, and will not be affected by the setting of Pr. 00-20 or the
Hand ON/OFF configuration.
14. When the PLC controls drive operation, if the keypad Stop setting is valid, this will trigger
an FStP error and cause stoppage.