Toho-electronics TTM200 Manual de usuario descargar pdf (Pagina 195)

48-7009-E 6-47

■ Valve motor stroke time

SEt04

CNt

Setting content

Initial value

VLt

0.1 to 999.9 (seconds)

3.0

Set the valve motor stroke time.

Output is generated for the time set for VLt (valve motor stroke time) when PV (measurement value) changes in range by the

amount identical to the proportional band range.

For the valve motor stroke time, set the time period from full open to full close of the valve used.

Setting example: For the position proportional control of the heating control, where settings are as follows: SV of 200°C,

proportional band range of 200°C and VLt of 10 seconds.

Output change is described as an example when the temperature changes as shown in the diagram below.

The temperature changes from 0 to 200°C, where the amount of the change is equivalent to the

proportional band range. This change results in the secondary control output (close) being output for 10

seconds, which is equivalent to the setting time for VLt.

Then, the temperature changes from 200°C to 100°C, which is equivalent to the half the proportional band

range. This change results in the primary control output (open) being output for 5 seconds, which is

equivalent to a half the setting time for VLt.

１００℃

Temperature

２００℃

０℃

ＳＶ＝２００℃

Proportional

band range

200℃

Secondary control

output (close)

Primary control

output (open)

10 seconds

5 seconds

Note Take care when selecting a valve, as the output is not turned off when the operating amount is in either 0 % or 100 %.

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Toho-electronics TTM200 Manual de usuario Pagina 195