The Explanation Of Command Order; The Detail Explanation Of Basic Structure Of Ladder Diagram - Delta Electronics AC Motor Drive VFD-E User Manual

Appendix D How to Use PLC Function|

The explanation of command order:

1
2
3
4
5
6
7
8

The detail explanation of basic structure of ladder diagram

1. LD (LDI) command: give the command LD or LDI in the start of a block.
The structures of command LDP and LDF are similar to the command LD. The difference is
that command LDP and LDF will act in the rising-edge or falling-edge when contact is ON as
shown in the following.
Rising-edge
X0
OFF
2. AND (ANI) command: single device connects to a device or a block in series.
D-12
LD X0
OR M0
AND X1
LD X3
AND M1
ORB
LD Y1
AND X4
LD T0
AND M3
ORB
ANB
OUT Y1
TMR T0 K10
LD command
AND Block
Time
ON
OFF
AND command
LD command
OR Block
X0
OFF
AND command
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
Falling-edge
Time
ON
OFF