Delta CT2000 Series User Manual page 444

16-2 Notes before PLC use
1. The PLC has a preset communications format of 7,N,2,9600, with node 2; the PLC node can be
changed in parameter 09-35, but this address may not be the same as the converter's address
setting of 09-00.
2. The CT2000 provides 2 communications serial ports that can be used to download PLC
programs (see figure below). Channel 1 has a fixed communications format of 19200,8,N,2
RTU.
3. The client can simultaneously access data from the converter and internal PLC, which is
performed through identification of the node. For instance, if the converter 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
converter parameter 04-00
02 (node) 03 (read) 0400 (address) 0001 (1 data item), indicating that it must read the data in
internal PLC X0
4. The PLC program will be disabled when uploading/downloading programs.
5. Please note when using WPR commands to write in parameters, values may be modified up to
a maximum of 10
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.
6. When parameter 00-04 is set as 28, the displayed value will be the value of PLC register D1043
(see figure below):
Digital Keypad KPC-CC01
Can display 0~65535
Channel 1
SG+
9
times, otherwise a memory write error will occur. The calculation of
16-3
Chapter 16 PLC Function CT2000 Series
SG-
Channel 2
8 1
M odbus RS-485
Pin 1~2, 7, 8:
Pin 3, 6:GND
Pin 4:SG-
Pin 5:SG+
RS-485
Digital Keypad KPC-CE01
0~9999
Reserved