Fuji Electric Micro-Controller X Socket type User Manual

32
Parameter functions and setting procedure
HyS
Hysteresis range for ON/OFF control (033)
[Description] –––––––––––––––––––––––––––––––––––––––––––––––––––––––
If you set the control method parameter [CtRL] to “ oNoF ,” set the hysteresis for on/off control in this parameter.
Setting range
0 to 50%FS

The controllability varies with the size of the hysteresis.
Small hysteresis

High-precision control

Frequency of output relays is high, so lifespan becomes short.
Large hysteresis

Low-precision control

Frequency of output relays is low, so lifespan is relatively long.

The relationship between SV and hysteresis in normal and reverse operation is shown below.
PV
ON
OFF
Control
Output
t
SV
Process
Value
PV<SV
PV>SV
Reverse
HYS
PV
ON
OFF
Control
Output
t
SV
Process
Value
PV>SV
PV<SV
Normal
HYS

During ON/OFF control, the [i] and [d] settings do not affect control.

If the hysteresis width is narrow, and PV and SV are nearly equal, the output may frequently switch on and off.
Note that it may affect the life of the contact.
Related parameters: Control algorithm [CtRL] (see page 36)

Fuji Electric Micro-Controller X Socket type Specifications

General

Brand	Fuji Electric
Model	Micro-Controller X Socket type
Category	Temperature Controller
Language	English