TOHO ELECTRONICS TTM200 - Manual (Page 195)

48-7009-E 6-47
■ Valve motor stroke time
SEt04
CNt
Setting content Initial value
58 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 %.