Toho-electronics TTM200 Manual do Utilizador descarregar pdf (Página 196)

48-7009-E 6-48

■ Valve motor drive dead band

SEt04

CNt

Setting content

Initial value

Vdb

0.0 to 100.0 (%)

1.0

Set a range such that the position proportional output is not provided even when the operating amount changes.

The range is represented as a ratio to the proportional band range.

When the proportional band is 200°C and Vdb (valve motor drive dead band) is set to 10.0 %, the actual range is 20°C.

Setting example: In such a case that the range of the valve motor drive dead band is 20°C as shown in the diagram below, no

output is provided when the temperature increases by 20°C.

Then, further increase by 5°C results in the output equivalent to 25 % (= 25°C ÷ 200°C).

When VLt (valve motor stroke time) is 10.0 seconds, the resultant time value is 2.5 seconds.

Temperature

２００

０

ＳＶ＝２００℃

Proportional

band range

200℃

Secondary control

output (close)

Primary control

output (open)

ＡＡ

PV increased by +20℃

and further by +5℃

■ Post-AT initial opening ratio

SEt04

CNt

Setting content

Initial value

ASP

0.0 to 100.0 (%)

50.0

Set the valve opening ratio for a value to be after the auto-tuning is conducted in the position proportional control.

The value of 50 % is normally appropriate.

After the auto-tuning is complete, the calculated operating amount is compared to the set operating amount in order to

determine a first output.

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Toho-electronics TTM200 Manual do Utilizador Página 196