Delta Electronics VFD-E manual RST M0 RST M1, Zrst M0 M2 RST M2

Appendix D How to Use PLC Function

Explanations:

1.Operand D occupies 3 consecutive devices.

2.See the specifications of each model for their range of use.

3.The contents in S1 and S2 are compared and the result will be stored in D.

4.The two comparison values are compared algebraically and the two values are signed binary values. When b15 = 1 in 16-bit instruction, the comparison will regard the value as negative binary values.

Program Example:

1.Designate device Y0, and operand D automatically occupies Y0, Y1, and Y2.

2.When X10 = On, CMP instruction will be executed and one of Y0, Y1, and Y2 will be On. When X10 = Off, CMP instruction will not be executed and Y0, Y1, and Y2 remain their status before X10 = Off.

3.If the user need to obtain a comparison result with ≥ ≤, and ≠, make a series parallel

connection between Y0 ~ Y2.

X10

CMP K10 D10 Y0

Y0

If K10>D10, Y0 = On

Y1

If K10=D10, Y1 = On

Y2

If K10<D10, Y2= On

4.To clear the comparison result, use RST or ZRST instruction.

X10

RST M0

RST M1

X10

ZRST M0 M2

RST M2

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-47