Hitachi L2002 manual 192

4–48

Using Intelligent Output Terminals

Operations and Monitoring

Option

Terminal

Function Name

Output

Description

Code

Symbol

State

07

FBV

Feedback Value

ON

• Transitions to ON when the inverter is in RUN

Check

Mode and the PID Process Variable (PV) is

less than the Feedback Low Limit (C053)

OFF

• Transitions to OFF when the PID Feedback

Value (PV) exceeds the PID High Limit

(C052)

• Transitions to OFF when the inverter goes

from Run Mode to Stop Mode

Valid for outputs:

11, 12, AL0 – AL2

Example (requires output configuration—

see page 3–54):

Required settings:

A076, C052, C053

Inverter output

FBV

Notes:

terminal circuit

• The [FBV] is designed for implementing two-stage

control. The PV high limit and PV low limit param-

CM2

12

11

eters, C052 and C053, do not function as process

alarm thresholds. Terminal [FBV] does not provide

a PID alarm function.

• The example circuit for terminal [12] drives a relay

+

–

RY

coil. Note the use of a diode to prevent the negative-

going turn-off spike generated by the coil from

damaging the inverter’s output transistor.

Example for terminals [AL0], [AL1], [AL2]

(requires output configuration—

see pages 4–36 and 3–54):

Inverter logic

FBV

circuit board

		AL0	AL1		AL2
	Power
See I/O specs				Load
	supply
on page 4–6.