LS Industrial Systems SV-iS7 PLC

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Chapter 7 Exclusive Functions for iS7 Inverter Control/Monitoring

7-17

(2) Monitoring inverter operation statuses (forward/reverse, constant speed,

accelerating/decelerating, stopped, etc)

It is possible to monitor the operation status of iS7 inverter, and make out a ladder program for the sequence

suitable for the operation status with PLC option card.

▶ Common area of inverter

Referring to the parameters (exclusively for monitoring) of inverter common area in the “App. 4-1, page 4,

Appendix,” the addresses of the common area of the inverter operation status are as follows.

Common Area

Address

Function Detailed Description

BIT0

BIT1

BIT2

BIT3

0: Stop

1: Forward operation

2: Reverse operation

3: DC operation (or 0 speed control)

BIT4

BIT5

BIT6

BIT7

1: During speed searching

2: Accelerating

3: Constant speed

4: Decelerating

5: Deceleration to stop

6: During H/W OC restraint

7: During S/W OC restraint

8: Dwell operating

BIT8

BIT9

BIT10

BIT11

Reserved

BIT8

BIT9

BIT10

0305 Hex

Inverter Operation

Status

BIT11

0: Normal Status

4: Warning Status

8: Fault Status

▶ Special D registers of PLC for inverter status monitoring corresponding to APO76 ~ 83

D4474