Delta MS300 Series User Manual page 668

16-2 Notes before Using a PLC
The MS300 provides two communication serial ports that you can use to download programs to the
1.
PLC (see Figure 16-1 below).
 Channel 1 (USB port) communication format is the same as channel 2.
 Channel 2 has a preset communication format of 7, N, 2, 9600; you can change to ASCII in
Pr.09-01 (transmission speed) and Pr.09-04 (communication protocol).
The PLC preset is node 2; you can change the PLC node in Pr.09-35 (PLC address), but this
2.
address may not be the same as the drive's address setting in Pr.09-00 (communication address).
The host controller can simultaneously access data from the drive and the internal PLC, using the
3.
identifier for the node. For instance, if the drive node is 1 and the internal PLC node is 2, then the
host controller command depends on the node address:
 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.
The PLC program is disabled when uploading / downloading programs.
4.
Note that when using WPR commands to write parameters, you may modify values up to a
5.
maximum of 10 9
modifications depends on whether the parameter value has changed. If you do not change the
value, it does not change the number of modifications; however, if the entered value is different from
before, the number of modifications increases by one.
times; otherwise, after which a memory write error occurs. The number of
Chapter 16 PLC Function ApplicationsMS300
Figure 16-1
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